Why OpenCV Using BGR Colour Space Instead of RGB

asked 2013-01-26 01:50:38 -0600

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Hi all. Can any one explain why OpenCV using BGR colour space instead of RGB. We all know that RGB is the convenient colour model for most of the computer graphics and also the human visual system works in a way that is similar to an RGB colour space. Is there any reason behind OpenCV BGR colour space ?.

Thanks in advance.......

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answered 2013-01-26 06:54:13 -0600

Mostafa Sataki

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updated 2013-01-26 13:51:45 -0600

SR
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I think because the standard bitmap has the following properties.

Bitmaps are saved row-based.
When the height is positive, it is a bottom-up bitmap, that is, the last line comes first in memory.
A row must be aligned on a 4-byte boundary.
Color channel order is BGR (unless specified otherwise by BI_BITFIELDS masks).