OpenCV some basic concepts encountered in the study

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1. Image depth

Image depth: is the number of bits used for each pixel is stored, is also a measure for the color resolution of the image.

2. alpha channel

Alpha channel (Alpha Channel) refers to the transparency and translucency of a picture. For example: a 16-bit storage of pictures, may 5 represent red, green represents 5, 5 denotes blue, and an Alpha. In this case, it either means transparent or not. A 32-bit image stored in each 8 bits red, green and blue, and alpha channel. In this case, light may not represent a transparent or opaque, may also represent the alpha channel 256 of translucency.