colorbalance_lib.h File Reference

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Functions
unsigned char *	colorbalance_rgb_u8 (unsigned char *rgb, size_t size, size_t nb_min, size_t nb_max)
	simplest color balance on RGB channels
float *	colorbalance_irgb_f32 (float *rgb, size_t size, size_t nb_min, size_t nb_max)
	simplest color balance based on the I axis applied to the RGB channels, bounded

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Function Documentation

float* colorbalance_irgb_f32	(	float *	rgb,
		size_t	size,
		size_t	nb_min,
		size_t	nb_max
	)

simplest color balance based on the I axis applied to the RGB channels, bounded

The input image is normalized by affine transformation on the I axis, saturating a percentage of the pixels at the beginning and end of the axis. This transformation is linearly applied to the R, G and B channels. The RGB cube is not stable by this operation, so some projections towards (0,0,0) on the RGB cube will be performed if needed.

Todo:

compute I=R+G+B instead of (R+G+B)/3 to save a division

Definition at line 72 of file colorbalance_lib.c.

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unsigned char* colorbalance_rgb_u8	(	unsigned char *	rgb,
		size_t	size,
		size_t	nb_min,
		size_t	nb_max
	)

simplest color balance on RGB channels

The input image is normalized by affine transformation on each RGB channel, saturating a percentage of the pixels at the beginning and end of the color space on each channel.

Definition at line 46 of file colorbalance_lib.c.

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