Add resize_from_cvimage method to Image class

[jibinmathew69]

Resize cv image in-memory, rather than reading from file

[thealokkr]

Hi @jibinmathew69 jibinmathew69. Could you elaborate your use case.

[jibinmathew69]

Write now the image needs to be read from a file to perform a resize+crop, but in case the image is already loaded in the memory as a numpy ndarray(say after being read using opencv) then it would be really useful to be able resize and crop in-memory.