How to use the trollimage.image.rgb2ycbcr function in trollimage
To help you get started, we’ve selected a few trollimage examples, based on popular ways it is used in public projects.
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pytroll / satpy / satpy / composites / __init__.py View on Github 
projectables = self.match_data_arrays(projectables)
luminance = projectables[0].copy()
luminance /= 100.
# Limit between min(luminance) ... 1.0
luminance = da.where(luminance > 1., 1., luminance)
# Get the enhanced version of the composite to be sharpened
rgb_img = enhance2dataset(projectables[1])
# This all will be eventually replaced with trollimage convert() method
# ycbcr_img = rgb_img.convert('YCbCr')
# ycbcr_img.data[0, :, :] = luminance
# rgb_img = ycbcr_img.convert('RGB')
# Replace luminance of the IR composite
y__, cb_, cr_ = rgb2ycbcr(rgb_img.data[0, :, :],
rgb_img.data[1, :, :],
rgb_img.data[2, :, :])
r__, g__, b__ = ycbcr2rgb(luminance, cb_, cr_)
y_size, x_size = r__.shape
r__ = da.reshape(r__, (1, y_size, x_size))
g__ = da.reshape(g__, (1, y_size, x_size))
b__ = da.reshape(b__, (1, y_size, x_size))
rgb_img.data = da.vstack((r__, g__, b__))
return super(LuminanceSharpeningCompositor, self).__call__(rgb_img, *args, **kwargs)
