image_preprocess resizing

[lukqw]

hi,
I just stumbled upon the code of image_preprocess in yolov3/utils.py
why is the image padded instead of resized (stretched) correctly?
is this why the boxes work better in my example with cv2 vs tf?

[lukqw]

on a sidenote: I removed the second cv2.cvtColor from my code as well as mentioned in this issue (#131)
that's why the resized cv2 image is correctly colored

[lukqw]

I have made the following changes to the utils functions:
image_preprocess

postprocess_boxes

I do realize a PR would be easier to follow but I am kinda lazy right now and would rather discuss if this is the right approach or not.

Results:

[pythonlessons]

Hi, you did interesting testing. I'll try this by myself and measure mAP before and after this change. I Will let you know the results.

[lukqw]

looking forward to your results!