Tag Archives: numpy

Using Single Shot Detection to detect birds (Episode three)

In the previous article, I reached mAP 0.740 for VOC2007 test. After one month, I found out that the key to boost the performance of object detction is not only based on cutting edge model, but also depends on sophisticated augmentation methodology. Therefore I manually checked every image generated by… Read more »

Some tips for opencv-python

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Type conversion Using opencv-python to add object-detection rectangle for the image:

The result looks like this But in a more complicated program, I processed a image from float32 type. Therefore the code looks like:

But this time, the rectangle disappeared. The reason is opencv-python use numpy array for… Read more »

Some errors in dataset pipeline of Tensorflow

To extend image datasets by using mixup´╝îI use this snippet to mix two images:

But after generating images by using this snippet, the training report errors:

The size of each image is 512x512x4 = 1048576 bytes. But I can’t understand why there is image has the size of… Read more »