Please enable cv.imencode and cv.imdecode in opencv.js while supporting PNG, JPEG and WEBP.

Add Seam Carving transform for images, masks, bounding boxes, landmarks:

https://www.pyimagesearch.com/2017/01/23/seam-carving-with-opencv-python-and-scikit-image/

https://github.com/andrewdcampbell/seam-carving

This feature is implemented in many graphics hardwares at least of most gaming consoles. Adding this feature would enable ImageSharp to natively allow for these specifications of graphics hardware to be supported out of the box.

As per OpenCV naming and implementation this feature is most likely known as "Remapping" or "Point remapping". So as the naming goes, it should incorporate either one.

Description

Consider this very short piece of code:

testimg = np.array([0, 1, 2, 3, 4, 3.5, 4, 5, 4, 3, 2, 1, 0])
morphology.h_maxima(testimg, 1)
morphology.h_maxima(testimg, 2)
morphology.h_maxima(testimg, 3)

The results show that the element with value 5 is always picked up by this function, even though it is not a local maximum with height h for any h; rather it i