Updated resize function to use cv2.INTER_LINEAR when upsizing images …

[west-rynes]

…& cv2 is available (downsizing still uses cv2.INTER_AREA). This gives better image quality while still being about as fast.

[Zulko]

Thanks, do you have a reference link or image examples to document the issue ?

[west-rynes]

I couldn't find a good companion of the different opencv interpolation algorithms so I wrote up a little comparison of the algorithms showing the image quality and the computation time:
http://tanbakuchi.com/posts/comparison-of-openv-interpolation-algorithms/

Hope this shows the difference. Mainly nicer not to have jagged edges when upsizing the images. But the inter_area is better for downsizing.

[Zulko]

Thanks, that's great !