Color dependent luminance processing

A method of developing a photographic image comprising:

• inputting an image from a camera;
• filtering said image;
• and
• developing said image,
• wherein said filtering of said image comprises:
• separating said image into a luminance channel and chrominance channels;
• altering said luminance channel by controlling saturation and hue to produce an altered luminance channel;
• and
• recombining said chrominance channels and said altered luminance channel.

A method of filtering a photographic image comprising:

• converting said image into a linear exposure;
• converting said linear exposure to a logarithmic space;
• separating said image into a luminance channel and a chrominance channels;
• altering said luminance channel by controlling saturation and hue to produce an altered luminance channel, wherein said altering comprises creating a filtered RGB to YCrCb matrix and applying said matrix to said logarithmic space to produce a filtered logarithmic space;
• and
• recombining said chrominance channels and said altered luminance channel, wherein said recombining comprises applying a YCrCb to RGB matrix to said filtered logarithmic space.

A system for developing a photographic image comprising

• a filter applied to said image, said filter comprising:
• a divider adapted to separate said image into a luminance channel and chrominance channels;
• a saturation control and a hue control adapted to alter said luminance channel and to produce an altered luminance channel;
• and
• an adder adapted to recombine said chromaniance channels and said altered luminance channel.