RGB to CMYK

Convert image from RGB color space to CMYK color space and split the channels.

plantcv.rgb2gray_cmyk(rgb_img, channel)

returns split image (c, m, y or k channel)

  • Parameters:

    • rgb_img - RGB image data
    • channel - Split 'c' (cyan), 'm' (magenta), 'y' (yellow) or 'k' (black) channel

  • Context:

    • Used to help differentiate plant and background

Original RGB image

Screenshot


from plantcv import plantcv as pcv

# Set global debug behavior to None (default), "print" (to file), 
# or "plot" (Jupyter Notebooks or X11)
pcv.params.debug = "plot"

# image converted from RGB to CMYK, channels are then split. 
y_channel = pcv.rgb2gray_cmyk(rgb_img=rgb_img, channel='Y')

Cyan channel image

Screenshot


# Cyan ('c') channel is output
c_channel = pcv.rgb2gray_cmyk(rgb_img=rgb_img, channel='C')

Magenta channel image

Screenshot


# Magenta ('m') channel is output
m_channel = pcv.rgb2gray_cmyk(rgb_img=rgb_img, channel='M')

Yellow channel image

Screenshot


# Yellow ('a') channel is output
y_channel = pcv.rgb2gray_cmyk(rgb_img=rgb_img, channel='Y')

Black channel image

Screenshot


# Black ('k') channel is output
k_channel = pcv.rgb2gray_cmyk(rgb_img=rgb_img, channel='K')

Source Code: Here