guides/yolo-common-issues/

[giscus[bot]]

guides/yolo-common-issues/

A comprehensive guide to troubleshooting common issues encountered while working with YOLOv8 in the Ultralytics ecosystem.

https://docs.ultralytics.com/guides/yolo-common-issues/

[FarhAnonymous]

I trained my model on custom dataset but it's only detecting object which I trained it on. And I want it to detect other objects as well as pre-trained model do.
Is there any way where I can use both the models together? like combining the pre-trained one and my own model?

Thanks in advance!

[pderrenger]

@FarhAnonymous hey there! 👋

To combine the strengths of a pre-trained model with your custom-trained model, you can consider a few approaches:

1. Fine-tuning: Start with a pre-trained model and continue training on your custom dataset. This way, the model retains its ability to detect objects it was originally trained on while adapting to your specific use case.

2. Ensemble Models: Run both models separately on the same input and combine their predictions. This could be as simple as taking the union of their detection sets or more complex strategies like weighted averaging based on confidence scores.

Here's a quick example of how you might fine-tune a pre-trained model on your custom dataset:

yolo train data=custom_dataset.yaml model=pretrained_model.pt

Make sure your custom_dataset.yaml points to your custom dataset and that pretrained_model.pt is the pre-trained model you wish to fine-tune.

Hope this helps, and best of luck with your object detection tasks! If you have any more questions, feel free to ask. 😊

[FarhAnonymous]

I used these both codes for my custom training, Can you choose either one of them and let me know what changes need to be done?

1st Code -

`import os

from ultralytics import YOLO

model = YOLO("yolov8n.pt") # build a new model from scratch

results = model.train(data=os.path.join(ROOT_DIR, "google_colab_config.yaml"), epochs=100) # train the model`

2nd Code -

!yolo task=detect mode=train model=yolov8l.pt data=../content/drive/MyDrive/Khalisha_Project/Datasets/HelmetDataset/data.yaml epochs=80 imgsz=640

Thank you!

[pderrenger]

Hello! Both of your code snippets are a good start for training a custom YOLOv8 model. Let's go with the first code example, and I'll suggest a few changes to ensure it's set up correctly:

import os
from ultralytics import YOLO

# Assuming ROOT_DIR is defined and points to the root directory of your project
ROOT_DIR = 'path/to/your/project/root'  # Replace with your actual root directory path

# Load a pretrained YOLOv8n model
model = YOLO('yolov8n.pt')

# Train the model on your custom dataset
results = model.train(data=os.path.join(ROOT_DIR, "google_colab_config.yaml"), epochs=100)

Make sure that:

• ROOT_DIR is correctly defined and points to the directory where your google_colab_config.yaml is located.
• Your google_colab_config.yaml is properly configured with the correct paths to your training and validation datasets, class names, and any other relevant settings.

If you encounter any issues or have further questions, feel free to reach out. Happy training! 😊🚀

[FarhAnonymous]

I tried the same approach but it didn't work.

Let me explain it, when I used the pre-trained model it was able to detect every object inside the image.

Then, I trained it on bicycle helmets using the same approach mentioned in the above threads but now it's only detecting bicycle helmets, not the other objects as the pre-trained model did. That's why I want to use both models together.

Can you please provide me with the best possible way to use both of them together so that they can detect other objects like cars, buses, and bicyclist helmets as well?

[glenn-jocher]

Hey there! 👋 It looks like you've trained your model specifically on bicycle helmets, which is why it's now focused on detecting just that. To detect helmets alongside other objects like cars and buses, you can try a couple of approaches:

1. Multi-Model Inference: Run inference with both models separately and combine the results. Here's a quick example in Python:

from ultralytics import YOLO

# Load your custom helmet model and the pre-trained model
helmet_model = YOLO('path/to/helmet_model.pt')
pretrained_model = YOLO('yolov8n.pt')

# Run inference with both models
helmet_results = helmet_model('path/to/image.jpg')
pretrained_results = pretrained_model('path/to/image.jpg')

# Combine results (this is a simplified example)
combined_results = helmet_results + pretrained_results

2. Fine-Tuning: Instead of training from scratch, fine-tune the pre-trained model on your helmet dataset. This way, the model retains its knowledge of other objects while learning about helmets.

Remember to adjust the confidence thresholds and non-max suppression as needed to get the best combined results. Hope this helps! 😊 Let me know if you have any more questions.

[FarhAnonymous]

Thank you so much for the reply!

The multi-model inference is working but I am not able to save the results, please guide me on how to save the results

And, Can you please provide me the code for Fine-Tuning? I used the large model and trained it on my custom helmet dataset, what am I doing different than fine-tuning?

[glenn-jocher]

Hey there! 😊

Great to hear that multi-model inference is working for you! To save the combined results, you can simply use the .save() method on each Results object and then merge the saved files as needed. Here's a quick example:

# After running inference with both models
helmet_results.save('helmet_detections')  # This saves helmet detection results
pretrained_results.save('pretrained_detections')  # This saves pretrained model results

Regarding fine-tuning, it's all about starting with a pre-trained model and continuing the training on your custom dataset. If you've already trained on your helmet dataset using the large model, you might have done fine-tuning without realizing it! The key is to load the pre-trained weights before training:

# Load the pre-trained model
model = YOLO('yolov8n.pt')  # pre-trained YOLOv8n

# Continue training on your custom dataset
model.train(data='helmet_data.yaml', epochs=50, imgsz=640)

Make sure your helmet_data.yaml points to your custom dataset. This way, the model retains its knowledge of other objects while learning about helmets. 🚴‍♂️👍

If you have any more questions or need further assistance, feel free to ask!

[FarhAnonymous]

As per your suggestions, I loaded the model before training it.

It shows that it transferred the items from pretrained weights

This is what I got at the end of the training and it looks good.

I used "best.pt" file to test whether it's working fine or not

Still, my model is not able to detect the items from pretrained weight and only detects helmets

Can you please look into my codes and all the steps and guide me on what exactly I am doing wrong?

[pderrenger]

Hey there! 👋 It looks like you've made great progress with your model training and testing. From the images you've shared, it seems like the model is doing well in detecting helmets, which is a good sign of learning. However, if it's not detecting other items from the pretrained weights as expected, here are a few things you might want to check:

1. Data Diversity: Ensure your training dataset is diverse enough, covering all the classes you want the model to detect. Sometimes, models might overfit to particular objects (like helmets in your case) if those objects are overrepresented or if the dataset lacks variety.

2. Learning Rate: If the learning rate is too high or too low, it might affect the model's ability to learn effectively from the pretrained weights. You might want to experiment with adjusting the learning rate.

3. Class Labels: Double-check your class labels in the training dataset to ensure they match the pretrained model's labels. A mismatch here could lead to the model not detecting certain objects correctly.

4. Model Architecture: If you've made any modifications to the model architecture, ensure those changes are compatible with the pretrained weights. Sometimes, even minor changes can impact the model's performance.

5. Inference Settings: When testing your model, ensure the inference settings (like confidence threshold and non-maximum suppression threshold) are not too restrictive, leading to missed detections.

Here's a quick example of how you might adjust the confidence threshold during inference to see if it helps with detection:

from ultralytics import YOLO

# Load your trained model
model = YOLO('path/to/best.pt')

# Run inference with a lower confidence threshold
results = model.predict('path/to/image.jpg', conf=0.2)  # Lowering the threshold
results.show()  # To visualize the results

If you've already checked these and are still facing issues, it might be helpful to share more details about your training process (like the loss curves) and the specific classes you're expecting to detect but aren't. This could provide more clues on what adjustments might be necessary. Keep up the great work, and don't hesitate to reach out for more assistance! 🚀

[FarhAnonymous]

First of all, thank you to all the team members. You all have been so helpful in my entire journey.

I tried it again considering each suggestion you provided but still, it didn't work. I trained on 100, 50, and 30 epochs but it didn't retain the pretrained weights. Following up on your last statement I am attaching my graphs and matrix (of 50 epochs cus it worked best among all).

Let me know if you need anything except than this.

Additionally, I want to calculate the distance between the bicyclist and the other passing-by vehicles. So, my approach is to train my model on a bicycle helmet so it can make it more unique to detect and then find the center point of the helmet and other passing-by vehicle bounding boxes and calculate the distance between them. If you can suggest a better approach, it would be really helpful.

Lastly, considering the final outcome please let me know what is the best and easiest possible way to calculate the distance between the bicycle helmet and other passing-by vehicles.

(If it can't retain the pre-trained weights, I am thinking of adding more classes into my custom dataset like cars, buses, trucks, and motorcycles which are the most common vehicles found on the roads.)

[glenn-jocher]

Hey there! 🌟 Thanks for the kind words and for sharing your journey with us. It looks like you've put in a lot of effort, and we're here to help you get across the finish line.

From the graphs and matrix you've shared, it seems like there might be a slight hiccup in retaining the pretrained weights. One common reason could be the way the model is loaded or the training script's setup. Could you double-check if you're using the .load() method correctly when initializing your model with the pretrained weights? Here's a quick example:

from ultralytics import YOLO

# Load a pretrained model and transfer weights
model = YOLO('yolov8n.yaml').load('yolov8n.pt')

Regarding calculating the distance between the bicyclist and passing vehicles, your approach sounds solid! Training on a unique feature like a bicycle helmet can indeed make detection more precise. For calculating distances, once you have the center points of the detected objects, you could use simple Euclidean distance if the camera perspective allows for it. However, for more accuracy, especially in varying perspectives or distances, considering camera calibration and depth estimation techniques might be beneficial.

If retaining pretrained weights continues to be an issue, diversifying your dataset with more classes is a smart move. It can help the model generalize better and improve detection robustness.

Let's keep the conversation going. If you have any more details or code snippets you're unsure about, feel free to share! 🚀

[FarhAnonymous]

After so many attempts to retain the pre-trained weights and failing every time, I trained my model on a dataset with more classes and finally, it's showing the desired result.

Now, can you please help me with calculating the distance between the helmet and other vehicles? I tried the approach given in the guides section but I need to do it manually every time. Is there any way where I just give my images/videos and it calculates the distance between the helmet and other vehicles?

[glenn-jocher]

Great to hear you've achieved the desired result with your model training! 🎉 For calculating the distance between the helmet and other vehicles, you can leverage the bounding box coordinates from your model's predictions. Here's a simplified approach assuming you have the coordinates:

from scipy.spatial import distance

# Assuming box1 = [x1, y1, x2, y2] for the helmet and box2 for the vehicle
# Calculate the centers of each box
center1 = ((box1[0]+box1[2])/2, (box1[1]+box1[3])/2)
center2 = ((box2[0]+box2[2])/2, (box2[1]+box2[3])/2)

# Calculate the Euclidean distance between the two centers
dist = distance.euclidean(center1, center2)
print(f"Distance: {dist}")

This code calculates the Euclidean distance between the centers of two bounding boxes. For a more automated solution, you could iterate over all detected helmets and vehicles in your images/videos, calculating distances as shown above. If you're looking for depth-wise distance (in 3D space), additional information like camera parameters or object size references would be needed.

If you have any more questions or need further assistance, feel free to ask!

[FarhAnonymous]

Thank you for the reply and help!

Can you please guide me to find the coordinates of each bounding box?

[glenn-jocher]

@FarhAnonymous hello! 😊

To find the coordinates of each bounding box after running predictions with your YOLOv8 model, you can access the boxes attribute of the results object. Here's a quick example:

from ultralytics import YOLO

# Load your model
model = YOLO('yolov8n.pt')  # or your custom model path

# Run predictions
results = model.predict('path/to/your/image.jpg')

# Access bounding box coordinates
for box in results[0].boxes.xyxy:
    x1, y1, x2, y2, conf, cls = box
    print(f"Coordinates: ({x1}, {y1}), ({x2}, {y2}) with confidence {conf} and class {cls}")

This will print the coordinates (x1, y1) for the top-left corner and (x2, y2) for the bottom-right corner of each bounding box, along with the confidence score and class ID for each detection.

Hope this helps! If you have any more questions, feel free to ask.

[FarhAnonymous]

While printing the coordinates, why am I getting this error?

Kindly, go through my code and the errors and please help me out what changes I need to do.

[glenn-jocher]

Hey there! 👋 It looks like you're encountering an error while trying to print coordinates. Without seeing the specific error message and your code, it's a bit tricky to pinpoint the exact issue. However, a common mistake could be related to how you're accessing or interpreting the results from your model predictions.

If you're working with YOLOv8 and trying to print out bounding box coordinates, make sure you're correctly extracting them from the results object. Here's a quick example on how to do it:

from ultralytics import YOLO

# Load your model
model = YOLO('path/to/your/model.pt')

# Run predictions
results = model.predict('path/to/your/image.jpg')

# Extract and print bounding box coordinates
for result in results:
    boxes = result.boxes.xyxy  # This gives you [xmin, ymin, xmax, ymax] format
    for box in boxes:
        print(f"Bounding box coordinates: {box}")

Make sure your path to the model and the image are correct. Also, adjust the result.boxes.xyxy based on the format you need (e.g., xywh for [x_center, y_center, width, height]).

If this doesn't solve your issue, could you please share more details about the error message? That would help in providing a more accurate solution. 😊

[FarhAnonymous]

I have attached the image, it's written there.

x1, y1, x2, y2, conf, cls = box

ValueError: not enough values to unpack (expected 6, got 4)

[glenn-jocher]

Hey there! It looks like you're trying to unpack the results into x1, y1, x2, y2, conf, cls, but you're getting fewer values than expected. This usually happens when the output format doesn't match your unpacking code. 😊

If you're using YOLOv8 and getting this error, it's likely because the results are returned as a list of Results objects, and you're trying to directly unpack the bounding box coordinates without accessing the boxes attribute first.

Here's a quick fix:

from ultralytics import YOLO

# Load your model
model = YOLO('path/to/your/model.pt')

# Run predictions
results = model.predict('path/to/your/image.jpg')

# Assuming you're working with the first image in the batch
boxes = results[0].boxes.xyxy[0]  # This gives you [xmin, ymin, xmax, ymax, conf, cls] for the first detection

# Now you can unpack the values
x1, y1, x2, y2, conf, cls = boxes

Make sure to adjust the indexing [0] based on which detection or image you're interested in. Hope this helps! Let me know if you have any more questions.

[FarhAnonymous]

Thank you soo much! It's working and I added a few extra lines of code and it's able to calculate the distance.

And got the distance but not sure what its unit is..

Please check the images attached and can you tell me what is the default unit of calculated distance?
And, I am not able to save the final result, can you guide me on how to save the detected and calculated distance image for better visualization?

[glenn-jocher]

Hey there! 🎉 I'm thrilled to hear that you've successfully integrated distance calculation into your project. Regarding the units of the calculated distance, it typically depends on the scale set during the distance calculation process. If you haven't applied any specific scaling, the units might be in pixels or relative to the image dimensions.

To save the final result with the detected objects and calculated distances for better visualization, you can use OpenCV. Here's a quick example on how to do it:

import cv2
# Assuming 'annotated_frame' is your image with detections
# and you want to add text for the distance
cv2.putText(annotated_frame, "Distance: {:.2f} units".format(distance), (x, y), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (255, 255, 255), 2)
# Save the result
cv2.imwrite('path/to/save/your_image.jpg', annotated_frame)

Make sure to replace "Distance: {:.2f} units".format(distance) with your actual distance variable and (x, y) with the coordinates where you want the text to appear.

Hope this helps! If you have any more questions or need further assistance, feel free to ask. Happy coding! 🚀

[FarhAnonymous]

Okay, I understand I need to import and use CV to download the results.

Can you please guide me on how to add my image in place of the annotated frame? like need to provide the source? Please refer to my image above which I used to calculate the distance.

[glenn-jocher]

Hey there! 😊 To add your own image in place of the annotated frame, you just need to load your image using OpenCV and then proceed with the distance calculation and annotation as you've done before. Here's a quick example:

import cv2
from ultralytics import YOLO

# Load your image
image_path = 'path/to/your/image.jpg'
image = cv2.imread(image_path)

# Load the model
model = YOLO('yolov8n.pt')

# Run prediction on your image
results = model(image)

# Assuming you've calculated distance and want to annotate it on the image
distance = "Your calculated distance"
cv2.putText(image, f"Distance: {distance}", (50, 50), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 0, 0), 2)

# Save the annotated image
cv2.imwrite('path/to/save/annotated_image.jpg', image)

Make sure to replace 'path/to/your/image.jpg' with the actual path to your image and 'path/to/save/annotated_image.jpg' with where you want to save the annotated image. The cv2.putText() function is used to add the distance annotation to your image. Adjust the position (50, 50) and other parameters as needed for your specific case.

Hope this helps! If you have any more questions, feel free to ask. Happy coding! 🚀

[FarhAnonymous]

Thank you @glenn-jocher , it worked.

But is it possible to detect, calculate, and show the results live using cv? Like, I have watched some videos on Linkedin, it shows distance live or we can say on video(moving objects)

[glenn-jocher]

Great to hear it worked out for you! 😊 Regarding detecting and showing results live using cv2 on videos, absolutely! You can achieve live detection and distance calculation by processing video frames in real-time. Here's a quick example to get you started:

import cv2
from ultralytics import YOLO

# Load the model
model = YOLO('yolov8n.pt')

# Open your video source (0 for the default webcam)
cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()
    if not ret:
        break
    
    # Run prediction on the current frame
    results = model(frame)
    
    # Add your distance calculation code here
    # For demonstration, let's assume 'distance' is the calculated distance
    distance = "Your calculated distance"
    
    # Annotate frame with the distance
    cv2.putText(frame, f"Distance: {distance}", (50, 50), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 0, 0), 2)
    
    # Display the frame
    cv2.imshow('YOLOv8 Live Detection', frame)
    
    # Break the loop with the 'q' key
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the capture
cap.release()
cv2.destroyAllWindows()

This script captures video frames from your default webcam, performs object detection and distance calculation on each frame, and overlays the results live on the video feed.

As for the default unit of calculated distance, it depends on how you've implemented the distance calculation. Typically, without real-world scale calibration, it might be in pixels or relative units based on image dimensions.

And to save the resulting image for better visualization, you can use the cv2.imwrite('filename.jpg', frame) function right after calculating the distance and annotating the frame.

If anything else pops up or you need further assistance, feel free to ask. Happy coding! 🚀

[tryprncp]

hi, I'm implementing yolov8 model in android gallery's search mechanism. the purpose of yolov8 model is to scan media files and return images that has a bounding box label that matches the search query. i can make it work with yolov5s.torchscript.ptl using org.pytorch:pytorch_android_lite:1.10.0 and org.pytorch:pytorch_android_torchvision_lite:1.10.0 but it wont work with yolov8s.torchscript. i really need help with this.

[glenn-jocher]

@tryprncp hi there! It seems you're facing some compatibility issues with exporting the YOLOv8 model for use on Android with PyTorch Android Lite. Here's a quick check you can do:

1. Ensure your YOLOv8 model is correctly converted to TorchScript using:

   model = YOLO('yolov8s.pt')  # Load YOLOv8 model
   model.cpu()  # Move the model to CPU
   traced_model = torch.jit.trace(model, torch.rand(1, 3, 640, 640))
   traced_model.save("yolov8s.torchscript.ptl")

2. Try updating PyTorch Android Lite and PyTorch Android TorchVision Lite libraries to the latest versions in your app's build.gradle. Sometimes, version mismatches can cause unexpected issues.

3. Verify that the YOLOv8 model doesn’t utilize any unsupported operations in TorchScript or PyTorch Mobile. The documentation on TorchScript operators compatibility could be helpful.

If these steps don’t resolve the issue, could you please share any error messages or logs you're encountering? This might give us more context to provide a more specific solution. 🛠️😊

For any advanced troubleshooting, our docs include several sections that might be beneficial, like dealing with export challenges.

[pramudithaSJ]

I have trained a custom model using yolov8 to identify a door as a obstacle. Using that custom model I have run a python script on raspberry pi 4 2gb detect the door from live feed( used a usb web cam with opencv capture the frame). but when the model is loaded fresh rate goes more slower. can I accelerate that refresh rate. I am undergraduate student and please help me. as a group we are going to make a wearable device for blind student in sri lanka to enhance the mobility.

[pderrenger]

It sounds like a wonderful project you're working on! To help speed up the inference on your Raspberry Pi 4, you might consider a few optimization techniques:

1. Model Simplification: Simplify your model if possible. Using a smaller version of YOLOv8, like YOLOv8n, can accelerate inference times with minimal impact on accuracy.
2. Quantization: Implement model quantization to reduce the precision of the numbers used in the model, which can lead to faster computation.
3. Optimized Libraries: Ensure you are using the most optimized version of libraries. Running pip install -U ultralytics might help update and optimize.

Here’s a small tweak you can incorporate when loading your model to use the TensorFlow Lite model, which is typically faster on devices like the Raspberry Pi:

from ultralytics import YOLO
model = YOLO('path/to/yolov8n-fp16.tflite')

Make sure to convert your PyTorch model to a TensorFlow Lite model with quantization to make the most of this approach. It can drastically reduce the computational overhead.

Let me know if this helps, or if you encounter any issues! 🚀

[pramudithaSJ]

I have tried to convert the model tflite file. https://docs.ultralytics.com/integrations/tflite/#usage
using this doc file but got an error.

TensorFlow SavedModel: export failure ❌ 41.5s: generic_type: cannot initialize type "StatusCode": an object with that name is already defined
Traceback (most recent call last):
File "/usr/local/bin/yolo", line 8, in

But . I got the two .tflite file best_16 and best_32

[pderrenger]

It looks like you encountered an error during the conversion, but the process still generated the .tflite files which is good news!

The error you're seeing might be linked to a version conflict or a problem during the model saving process in TensorFlow. Here’s a quick suggestion to possibly resolve the issue:

1. Ensure Environment Cleanliness: Sometimes, previous installations or residual files can cause conflicts. Consider setting up a fresh virtual environment and reinstall the required packages.
2. Update All Packages: Ensure that TensorFlow and Ultralytics libraries are up to date. You can update them via pip:

pip install --upgrade tensorflow ultralytics

3. Retry the Export: After setting up your environment, try to export the model again. If the issue persists, it could be helpful to look into the specific TensorFlow version compatibility or any known issues with the model format.

If this doesn't work or you need more detailed assistance, feel free to share additional details or ask for help on the Ultralytics GitHub Issues page. The community and developers there can offer tailored support. Keep pushing on your project; you're doing great work! 🚀

[pramudithaSJ]

I converted my .pt model into .tflite model
here is the comparison of those models
but it didn't work I think. what can I do for it now?

(1) best.pt model
0: 384x640 (no detections), 97.4ms
Speed: 1.4ms preprocess, 97.4ms inference, 0.2ms postprocess per image at shape (1, 3, 384, 640)

(2) best_floalt32.lite
0: 640x640 (no detections), 438.3ms
Speed: 1.2ms preprocess, 438.3ms inference, 0.6ms postprocess per image at shape (1, 3, 640, 640)

import cv2
import time
from ultralytics import YOLO

# Load the YOLOv8 model
model = YOLO('models/best_float32.tflite')

# Open the video file
cap = cv2.VideoCapture(0)

# Initialize variables for FPS calculation
start_time = time.time()
frame_count = 0

# Loop through the video frames
while cap.isOpened():
    # Read a frame from the video
    success, frame = cap.read()

    if success:
        # Run YOLOv8 inference on the frame
        results = model(frame)

        # Visualize the results on the frame
        annotated_frame = results[0].plot()

        # Calculate FPS
        frame_count += 1
        elapsed_time = time.time() - start_time
        fps = frame_count / elapsed_time

        # Overlay FPS on the annotated frame
        cv2.putText(annotated_frame, f"FPS: {fps:.2f}", (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2)

        # Display the annotated frame
        cv2.imshow("YOLOv8 Inference", annotated_frame)

        # Break the loop if 'q' is pressed
        if cv2.waitKey(1) & 0xFF == ord("q"):
            break
    else:
        # Break the loop if the end of the video is reached
        break

# Release the video capture object and close the display window
cap.release()
cv2.destroyAllWindows()




 

[pderrenger]

It looks like you've successfully converted your model to .tflite format, but the inference time has increased significantly. This can happen due to various reasons, including the computational capabilities of the device or the optimization of the model.

Here are a few suggestions to potentially improve the performance:

1. Optimize the TFLite Model: If not already done, consider using TensorFlow Lite's optimization options such as quantization. You can convert the model with dynamic range or full integer quantization to reduce the model size and potentially increase the inference speed.

2. Use Edge TPU: If you have access to an Edge TPU, such as the Coral USB Accelerator, you can compile the .tflite model for the Edge TPU. This specialized hardware can significantly speed up inference times for TFLite models.

3. Adjust the Input Size: Reducing the input size of the model can decrease inference time but might affect the accuracy. Experiment with different sizes to find a good balance for your application.

4. Experiment with Different Interpreters: If you're using the TensorFlow Lite Interpreter, try adjusting its settings, such as the number of threads (num_threads parameter) to see if it improves performance.

Here's an example of how you might implement quantization during the conversion process:

import tensorflow as tf

converter = tf.lite.TFLiteConverter.from_saved_model(saved_model_dir)
converter.optimizations = [tf.lite.Optimize.DEFAULT]
tflite_quant_model = converter.convert()

# Save the quantized model
with open('best_quantized.tflite', 'wb') as f:
    f.write(tflite_quant_model)

Try these adjustments and see if they help improve the inference speed! 🚀

[boncer99]

I have installed yolo ultralytics (!pip install ultralytics) in my PC with jupyter notebook using Anaconda Navigator,
but it detects all classes with a confidence value equal to one. On google colab, the same code works fine.

When I run this:
results = model.predict(source="https://files.pucp.education/puntoedu/wp-content/uploads/2023/06/10050905/bus-pucp-plaza-san-miguel-rutas-horario-2023.jpg", save=True, classes=[0,5]) # predict on an image

I get:
Found https://files.pucp.education/puntoedu/wp-content/uploads/2023/06/10050905/bus-pucp-plaza-san-miguel-rutas-horario-2023.jpg locally at bus-pucp-plaza-san-miguel-rutas-horario-2023.jpg
image 1/1 E:\datos2024\cursos\6julio_cursoPUCPsegm\miclases\3\bus-pucp-plaza-san-miguel-rutas-horario-2023.jpg: 384x640 158 persons, 43 buss, 177.4ms
Speed: 3.4ms preprocess, 177.4ms inference, 2.5ms postprocess per image at shape (1, 3, 384, 640)
Results saved to runs\detect\predict4

I hope you can help me. Thanks.

[glenn-jocher]

@boncer99 it seems like the issue might be related to the environment setup on your local machine. Please ensure that you are using the latest versions of the Ultralytics package and its dependencies. Also, verify that your local environment matches the configuration in Google Colab, especially the versions of Python and PyTorch. If the problem persists, try running a fresh installation in a new virtual environment. For further troubleshooting, you can refer to our Common Issues Guide.

[boncer99]

Thanks for the replies. I have run the installation and execution steps (https://docs.ultralytics.com/quickstart/#use-ultralytics-with-cli), just with the line "yolo predict model=yolov8n.pt imgsz=640 conf=0.25", and I get the same results
That's the image I get, and those are the versions I detected installed in Colab and in Anaconda Navigator

import ultralytics
print(ultralytics.version)
import torch
print(torch.version)
import cv2
print(cv2.version)
!python --version

In Google Colab
8.2.76
2.3.1+cu121
4.10.0
Python 3.10.12

In Anaconda Navigator (Jupyter Notebook)
8.2.76
2.4.0+cpu
4.10.0
Python 3.10.0

[glenn-jocher]

It looks like the issue might be due to the difference in PyTorch versions between your local setup and Google Colab. Please ensure you have the latest version of PyTorch installed locally. You can update PyTorch using the following command:

pip install torch --upgrade

If the issue persists, consider creating a new virtual environment and reinstalling the dependencies. For further troubleshooting, you can refer to our Common Issues Guide.

[ddhyani]

@boncer99 try the following command. It will update all the packages. I was facing the same problem and it fixed it.

This method is an excellent alternative to pip and ensures compatibility with other packages in your environment. For CUDA environments, it's best to install ultralytics, pytorch, and pytorch-cuda simultaneously to resolve any conflicts:

conda install -c pytorch -c nvidia -c conda-forge pytorch torchvision pytorch-cuda=11.8 ultralytics

[ManojShakya]

Subject: Issue with False Object Detections in YOLOv8 Pre-Trained Model

Dear Ultralytics Team,

I am encountering an issue while using a pre-trained YOLOv8 model for object detection. When I input an image containing two objects, such as a cat and a dog, the model unexpectedly detects multiple other objects like a keyboard, sheep, car, train, bus, and more—none of which are actually present in the image and with 100 percentage probability score.

Could you please provide guidance on how to resolve this issue? Any advice or recommendations would be greatly appreciated.

[glenn-jocher]

@ManojShakya thank you for reaching out. It sounds like there might be an issue with the model's confidence threshold or potential data inconsistencies. First, ensure you're using the latest version of the YOLOv8 package. If the issue persists, try adjusting the confidence threshold to filter out low-confidence detections. Additionally, verify that your input images and annotations are correctly formatted. For more detailed troubleshooting, please refer to our Common Issues Guide.

[xsvebmx]

Please help (

cmd> yolo task=detect mode=train model=yolov8s.pt data=data_custom.yaml epochs=50 imgsz=640 batch=8

train: Scanning X:\Desktop\NNXTSSS\train\labels.cache... 1 images, 12 backgrounds, 0 corrupt: 100%|██████████| 12/12 [00:00<?, ?it/s]
WARNING ⚠️ No labels found in X:\Desktop\NNXTSSS\train\labels.cache, training may not work correctly. See https://docs.ultralytics.com/datasets for dataset formatting guidance.
val: Scanning X:\Desktop\NNXTSSS\val\labels.cache... 0 images, 5 backgrounds, 0 corrupt: 100%|██████████| 5/5 [00:00<?, ?it/s]
WARNING ⚠️ No labels found in X:\Desktop\NNXTSSS\val\labels.cache, training may not work correctly. See https://docs.ultralytics.com/datasets for dataset formatting guidance.
Plotting labels to runs\detect\train7\labels.jpg...
zero-size array to reduction operation maximum which has no identity

WARNING ⚠️ no labels found in detect set, can not compute metrics without labels

  Epoch    GPU_mem   box_loss   cls_loss   dfl_loss  Instances       Size
   2/50      2.02G          0      210.6          0          0        640: 100%|██████████| 2/2 [00:02<00:00,  1.45s/it]
             Class     Images  Instances      Box(P          R      mAP50  mAP50-95):   0%|          | 0/1 [00:00<?, ?it/s]

data_custom.yaml

val: X:/Desktop/NNXTSSS/val
nc: 1

names: ["hat"]```

[xsvebmx]

https://imgur.com/a/6mbq5I8

[glenn-jocher]

@xsvebmx it seems like there are no labels found in your dataset, which is causing the training issues. Please ensure that your label files are correctly formatted and located in the specified directories. You can refer to the dataset formatting guide at https://docs.ultralytics.com/datasets for more details. If the issue persists, double-check the paths in your data_custom.yaml file to ensure they point to the correct locations.

[xsvebmx]

I was stupid , I compiled the data set incorrectly, and because of this, an error was issued, Thank you for support😁 (i wanna sleep😭)

[glenn-jocher]

I'm glad you figured it out! If you need further assistance, feel free to reach out. Rest well!

[tylerfrisinger01]

is it possible that YOLOv11 will take a lot longer to train compared to YOLOv8? My model is currently doing about 1 epoch every hour and a half. I currently have it so it will do 300 epochs as recommended on the training page. Should i switch to YOLOv8 instead?

[Y-T-G]

YOLOv8 trains faster. But not a lot faster.

[tylerfrisinger01]

Is there anything I can do to increase the speed of training either v8 or v11? At this point I’m concerned it may take days. Should I only do 100 epochs the first training round and then train it again at 100? And again and again?

[Y-T-G]

You can try training on Google Colab