First, the relevant image color space introduced
1. RGB color space
RGB color space to Red, Green, Blue three basic colors, based on varying degrees of superposition, resulting in a rich and wide range of colors, so called three-color mode.
Common RGB formats: RGB_565, RGB_888, ARGB_8888, ARGB_4444 and so on.
2. YUV color space
In the YUV color space, Y is used to represent the luminance, U and V represent chrominance used.
Common YUV format in the following categories:
planar: Y, U, V all successively stored, such as I420, YV12, i.e. three plane
packed: Y, U, V interleaved, such as YUYV, i.e. a plane
semi-planar: Y stored contiguously, U, V interleaved, such NV21 (Hass YVU in image format), in NV12, i.e. two plane
Second, the relevant image format introduced
Here are just Hass describes commonly used in YUV format:
1. NV21 image format
NV21 image format YUV color space belongs YUV420SP format, each set of four Y components share a U and V components, consecutively ordered Y, U and V cross-sorting.
The arrangement:
2. NV12 image format
NV12 image format YUV color space belongs YUV420SP format, each set of four Y components share a U and V components, consecutively ordered Y, U and V cross-ordering (NV12 and NV21 position just opposite to the U and V).
The arrangement:
3. I420 image format
I420 image format YUV color space belongs YUV420P format, each set of four Y components share a U and V components, Y, U, V are each consecutively ordered.
The arrangement:
4. YV12 image format
YV12 image format YUV color space belongs YUV420P format, each set of four Y components share a U and V components, Y, U, V are each successive sorting (YV12 and I420 position just opposite to the U and V).
The arrangement:
5. YUYV format images
YUYV image format YUV color space belonging to the YUV422 format, each of the two components share a Y U and V components, Y, U, V intersect sort.
The arrangement:
