Source code for moviepy.video.fx.lum_contrast
[docs]def lum_contrast(clip, lum=0, contrast=0, contrast_threshold=127):
"""Luminosity-contrast correction of a clip."""
def image_filter(im):
im = 1.0 * im # float conversion
corrected = im + lum + contrast * (im - float(contrast_threshold))
corrected[corrected < 0] = 0
corrected[corrected > 255] = 255
return corrected.astype("uint8")
return clip.image_transform(image_filter)