Transforms a color image to a grayscale image

[grayscale,color_boost] = cv.decolor(src)
[grayscale,color_boost] = cv.decolor(src, 'OptionName',optionValue, ...)

Input

• src Input 8-bit 3-channel color image.

Output

• grayscale Output 8-bit 1-channel grayscale image.
• color_boost Output 8-bit 3-channel contrast-boosted color image. It is obtained by converting src to Lab color space, replacing the lightness channel with grayscale, and converting back to RGB color space.

Options

• FlipChannels whether to flip the order of color channels in input src and output color_boost, between MATLAB's RGB order and OpenCV's BGR (input: RGB->BGR, output: BGR->RGB). default true

It is a basic tool in digital printing, stylized black-and-white photograph rendering, and in many single channel image processing applications [CL12].

This function is to be applied on color images.

References

[CL12]:

Cewu Lu, Li Xu, and Jiaya Jia. "Contrast preserving decolorization". In Computational Photography (ICCP), 2012 IEEE International Conference on, pages 1-7. IEEE, 2012.