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--- |
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license: other |
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license_name: sla0044 |
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license_link: >- |
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https://github.st.com/AIS/stm32ai-modelzoo/raw/master/object_detection/LICENSE.md |
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pipeline_tag: object-detection |
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--- |
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# ST YOLO LC V1 quantized |
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## **Use case** : `Object detection` |
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# Model description |
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ST Yolo LC v1 is a real-time object detection model targeted for real-time processing implemented in Tensorflow. |
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The model is quantized in int8 format using tensorflow lite converter. |
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## Network information |
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| Network information | Value | |
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|-------------------------|-----------------| |
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| Framework | TensorFlow Lite | |
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| Quantization | int8 | |
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| Paper | https://pjreddie.com/media/files/papers/YOLO9000.pdf | |
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The models are quantized using tensorflow lite converter. |
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## Network inputs / outputs |
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For an image resolution of NxM and NC classes |
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| Input Shape | Description | |
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| ----- | ----------- | |
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| (1, W, H, 3) | Single NxM RGB image with UINT8 values between 0 and 255 | |
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| Output Shape | Description | |
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| ----- | ----------- | |
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| (1, WxH, NAx(5+NC)) | FLOAT values Where WXH is the resolution of the output grid cell, NA is the number of anchors and NC is the number of classes| |
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## Recommended Platforms |
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| Platform | Supported | Recommended | |
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|----------|-----------|-------------| |
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| STM32L0 | [] | [] | |
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| STM32L4 | [] | [] | |
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| STM32U5 | [] | [] | |
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| STM32H7 | [x] | [x] | |
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| STM32MP1 | [x] | [x] | |
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| STM32MP2 | [x] | [] | |
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| STM32N6 | [x] | [] | |
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# Performances |
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## Metrics |
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Measures are done with default STM32Cube.AI configuration with enabled input / output allocated option. |
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### Reference **NPU** memory footprint based on COCO Person dataset (see Accuracy for details on dataset) |
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| Model | Dataset | Format | Resolution | Series | Internal RAM (KiB) | External RAM (KiB) | Weights Flash (KiB) | STM32Cube.AI version | STEdgeAI Core version | |
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|---------------------------------------------------------------------------------------------------------------------|-------------|----------|--------------|----------|----------------------|----------------------|-----------------------|------------------------|-------------------------| |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_192/st_yolo_lc_v1_192_int8.tflite) | COCO-Person | Int8 | 192x192x3 | STM32N6 | 252 | 0 | 316.69 | 10.2.0 | 2.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_224/st_yolo_lc_v1_224_int8.tflite) | COCO-Person | Int8 | 224x224x3 | STM32N6 | 343 | 0 | 316.69 | 10.2.0 | 2.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_256/st_yolo_lc_v1_256_int8.tflite) | COCO-Person | Int8 | 256x256x3 | STM32N6 | 576 | 0 | 316.69 | 10.2.0 | 2.2.0 | |
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### Reference **NPU** inference time based on COCO Person dataset (see Accuracy for details on dataset) |
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| Model | Dataset | Format | Resolution | Board | Execution Engine | Inference time (ms) | Inf / sec | STM32Cube.AI version | STEdgeAI Core version | |
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|---------------------------------------------------------------------------------------------------------------------|-------------|----------|--------------|---------------|--------------------|-----------------------|-------------|------------------------|-------------------------| |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_192/st_yolo_lc_v1_192_int8.tflite) | COCO-Person | Int8 | 192x192x3 | STM32N6570-DK | NPU/MCU | 1.96 | 510.2 | 10.2.0 | 2.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_224/st_yolo_lc_v1_224_int8.tflite) | COCO-Person | Int8 | 224x224x3 | STM32N6570-DK | NPU/MCU | 2.36 | 423.73 | 10.2.0 | 2.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_224/st_yolo_lc_v1_256_int8.tflite) | COCO-Person | Int8 | 256x256x3 | STM32N6570-DK | NPU/MCU | 3.02 | 331.13 | 10.2.0 | 2.2.0 | |
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### Reference **MCU** memory footprint based on COCO Person dataset (see Accuracy for details on dataset) |
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| Model | Format | Resolution | Series | Activation RAM | Runtime RAM | Weights Flash | Code Flash | Total RAM | Total Flash | STM32Cube.AI version | |
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|---------------------------------------------------------------------------------------------------------------------|----------|--------------|----------|------------------|---------------|-----------------|--------------|-------------|---------------|------------------------| |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_192/st_yolo_lc_v1_192_int8.tflite) | Int8 | 192x192x3 | STM32H7 | 166.29 | 8.09 | 276.73 | 52.81 | 174.38 | 329.54 | 10.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_224/st_yolo_lc_v1_224_int8.tflite) | Int8 | 224x224x3 | STM32H7 | 217.29 | 8.09 | 276.73 | 52.82 | 225.38 | 329.55 | 10.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_256/st_yolo_lc_v1_256_int8.tflite) | Int8 | 256x256x3 | STM32H7 | 278.29 | 8.09 | 276.73 | 52.81 | 286.38 | 329.54 | 10.2.0 | |
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### Reference **MCU** inference time based on COCO Person dataset (see Accuracy for details on dataset) |
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| Model | Format | Resolution | Board | Execution Engine | Frequency | Inference time (ms) | STM32Cube.AI version | |
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|---------------------------------------------------------------------------------------------------------------------|----------|--------------|------------------|--------------------|-------------|-----------------------|------------------------| |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_192/st_yolo_lc_v1_192_int8.tflite) | Int8 | 192x192x3 | STM32H747I-DISCO | 1 CPU | 400 MHz | 179.36 | 10.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_224/st_yolo_lc_v1_224_int8.tflite) | Int8 | 224x224x3 | STM32H747I-DISCO | 1 CPU | 400 MHz | 244.75 | 10.2.0 | |
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| [st_yolo_lc_v1](https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/st_yolo_lc_v1/ST_pretrainedmodel_public_dataset/coco_2017_person/st_yolo_lc_v1_256/st_yolo_lc_v1_256_int8.tflite) | Int8 | 256x256x3 | STM32H747I-DISCO | 1 CPU | 400 MHz | 320.79 | 10.2.0 | |
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### Reference **MPU** inference time based on COCO Person dataset (see Accuracy for details on dataset) |
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| Model | Format | Resolution | Quantization | Board | Execution Engine | Frequency | Inference time (ms) | %NPU | %GPU | %CPU | X-LINUX-AI version | Framework | |
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|---------------|--------|------------|---------------|-------------------|------------------|-----------|---------------------|-------|-------|------|--------------------|-----------------------| |
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| st_yolo_lc_v1 | Int8 | 192x192x3 | per-channel** | STM32MP257F-DK2 | NPU/GPU | 800 MHz | 11.88 ms | 2.62 | 97.38 |0 | v6.1.0 | OpenVX | |
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| st_yolo_lc_v1 | Int8 | 224x224x3 | per-channel** | STM32MP257F-DK2 | NPU/GPU | 800 MHz | 17.60 ms | 3.33 | 96.67 |0 | v6.1.0 | OpenVX | |
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| st_yolo_lc_v1 | Int8 | 256x256x3 | per-channel** | STM32MP257F-DK2 | NPU/GPU | 800 MHz | 13.93 ms | 5.12 | 94.88 |0 | v6.1.0 | OpenVX | |
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| st_yolo_lc_v1 | Int8 | 192x192x3 | per-channel | STM32MP157F-DK2 | 2 CPU | 800 MHz | 33.38 ms | NA | NA |100 | v6.1.0 | TensorFlowLite 2.18.0 | |
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| st_yolo_lc_v1 | Int8 | 224x224x3 | per-channel | STM32MP157F-DK2 | 2 CPU | 800 MHz | 45.43 ms | NA | NA |100 | v6.1.0 | TensorFlowLite 2.18.0 | |
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| st_yolo_lc_v1 | Int8 | 256x256x3 | per-channel | STM32MP157F-DK2 | 2 CPU | 800 MHz | 58.80 ms | NA | NA |100 | v6.1.0 | TensorFlowLite 2.18.0 | |
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| st_yolo_lc_v1 | Int8 | 192x192x3 | per-channel | STM32MP135F-DK2 | 1 CPU | 1000 MHz | 52.63 ms | NA | NA |100 | v6.1.0 | TensorFlowLite 2.18.0 | |
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| st_yolo_lc_v1 | Int8 | 224x224x3 | per-channel | STM32MP135F-DK2 | 1 CPU | 1000 MHz | 72.51 ms | NA | NA |100 | v6.1.0 | TensorFlowLite 2.18.0 | |
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| st_yolo_lc_v1 | Int8 | 256x256x3 | per-channel | STM32MP135F-DK2 | 1 CPU | 1000 MHz | 95.84 ms | NA | NA |100 | v6.1.0 | TensorFlowLite 2.18.0 | |
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** **To get the most out of MP25 NPU hardware acceleration, please use per-tensor quantization** |
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### AP on COCO Person dataset |
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Dataset details: [link](https://cocodataset.org/#download) , License [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/legalcode) , Quotation[[1]](#1) , Number of classes: 80, Number of images: 118,287 |
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| Model | Format | Resolution | AP | |
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|-------|--------|------------|----| |
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| st_yolo_lc_v1 | Int8 | 192x192x3 | 30.7 % | |
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| st_yolo_lc_v1 | Float | 192x192x3 | 31.2 % | |
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| st_yolo_lc_v1 | Int8 | 224x224x3 | 34.2 % | |
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| st_yolo_lc_v1 | Float | 224x224x3 | 33.8 % | |
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| st_yolo_lc_v1 | Int8 | 256x256x3 | 35.6 % | |
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| st_yolo_lc_v1 | Float | 256x256x3 | 36.4 % | |
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\* EVAL_IOU = 0.5, NMS_THRESH = 0.5, SCORE_THRESH = 0.001, MAX_DETECTIONS = 100 |
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## Retraining and Integration in a simple example: |
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Please refer to the stm32ai-modelzoo-services GitHub [here](https://github.com/STMicroelectronics/stm32ai-modelzoo-services) |
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# References |
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<a id="1">[1]</a> |
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“Microsoft COCO: Common Objects in Context”. [Online]. Available: https://cocodataset.org/#download. |
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@article{DBLP:journals/corr/LinMBHPRDZ14, |
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author = {Tsung{-}Yi Lin and |
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Michael Maire and |
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Serge J. Belongie and |
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Lubomir D. Bourdev and |
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Ross B. Girshick and |
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James Hays and |
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Pietro Perona and |
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Deva Ramanan and |
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Piotr Doll{'{a} }r and |
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C. Lawrence Zitnick}, |
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title = {Microsoft {COCO:} Common Objects in Context}, |
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journal = {CoRR}, |
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volume = {abs/1405.0312}, |
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year = {2014}, |
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url = {http://arxiv.org/abs/1405.0312}, |
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archivePrefix = {arXiv}, |
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eprint = {1405.0312}, |
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timestamp = {Mon, 13 Aug 2018 16:48:13 +0200}, |
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biburl = {https://dblp.org/rec/bib/journals/corr/LinMBHPRDZ14}, |
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bibsource = {dblp computer science bibliography, https://dblp.org} |
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} |
