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Merge remote-tracking branch 'upstream/3.4' into merge-3.4

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Alexander Alekhin
2020-12-11 19:27:20 +00:00
parent 5bb45baa6c 1bfc75ac23
commit dd1494eebf
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samples/dnn/README.md
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@@ -19,6 +19,36 @@ Check `-h` option to know which values are used by default:
python object_detection.py opencv_fd -h
```
### Sample models
You can download sample models using ```download_models.py```. For example, the following command will download network weights for OpenCV Face Detector model and store them in FaceDetector folder:
```bash
python download_models.py --save_dir FaceDetector opencv_fd
```
You can use default configuration files adopted for OpenCV from [here](https://github.com/opencv/opencv_extra/tree/master/testdata/dnn).
You also can use the script to download necessary files from your code. Assume you have the following code inside ```your_script.py```:
```python
from download_models import downloadFile
filepath1 = downloadFile("https://drive.google.com/uc?export=download&id=0B3gersZ2cHIxRm5PMWRoTkdHdHc", None, filename="MobileNetSSD_deploy.caffemodel", save_dir="save_dir_1")
filepath2 = downloadFile("https://drive.google.com/uc?export=download&id=0B3gersZ2cHIxRm5PMWRoTkdHdHc", "994d30a8afaa9e754d17d2373b2d62a7dfbaaf7a", filename="MobileNetSSD_deploy.caffemodel")
print(filepath1)
print(filepath2)
# Your code
```
By running the following commands, you will get **MobileNetSSD_deploy.caffemodel** file:
```bash
export OPENCV_DOWNLOAD_DATA_PATH=download_folder
python your_script.py
```
**Note** that you can provide a directory using **save_dir** parameter or via **OPENCV_SAVE_DIR** environment variable.
#### Face detection
[An origin model](https://github.com/opencv/opencv/tree/master/samples/dnn/face_detector)
with single precision floating point weights has been quantized using [TensorFlow framework](https://www.tensorflow.org/).
@@ -48,7 +78,7 @@ AR @[ IoU=0.50:0.95 | area= large | maxDets=100 ] | 0.528 | 0.528 |
```
## References
* [Models downloading script](https://github.com/opencv/opencv_extra/blob/master/testdata/dnn/download_models.py)
* [Models downloading script](https://github.com/opencv/opencv/samples/dnn/download_models.py)
* [Configuration files adopted for OpenCV](https://github.com/opencv/opencv_extra/tree/master/testdata/dnn)
* [How to import models from TensorFlow Object Detection API](https://github.com/opencv/opencv/wiki/TensorFlow-Object-Detection-API)
* [Names of classes from different datasets](https://github.com/opencv/opencv/tree/master/samples/data/dnn)