Conversion between any/all of BGR, RGB, and GBR may be necessary when working with
- Matplotlib
pyplot.imshow()
:M x N x 3
image, where last dimension is RGB. - OpenCV
cv2.imshow()
:M x N x 3
image, where last dimension is BGR - Scientific Cameras: some output
M X N x 3
image, where last dimension is GBR
Python BGR to RGB code: RGB_BGR_GBR_conv.py
BGR to RGB
OpenCV image to Matplotlib
rgb = bgr[...,::-1]
RGB to BGR
Matplotlib image to OpenCV
bgr = rgb[...,::-1]
RGB to GBR
gbr = rgb[...,[2,0,1]]
Axis order for Python images
- 3-D: W x H x 3, where the last axis is color (e.g. RGB)
- 4-D: W x H x 3 x 1, where the last axis is typically an alpha channel
参考:
https://www.scivision.co/numpy-image-bgr-to-rgb/
https://blog.youkuaiyun.com/yuanlulu/article/details/79982347