Color processing apparatus and method thereof for color conversion using ambient light parameter
Color processing is performed for an image such that more preferable color representation can be obtained under viewing environments having different viewing conditions. Hence, a setting unit inputs a plurality of viewing conditions of the output side of an image. A calculation unit sets a viewing condition used to calculate an ambient light parameter, based on the plurality of viewing conditions, and calculates an ambient light parameter based on the set viewing condition. A conversion unit performs inverse conversion of a color appearance model to color data by using the ambient light parameter.
1. A color processing apparatus comprising:
an inputting section, constructed to input a plurality of viewing conditions of an image at an output destination, wherein the plurality of viewing conditions comprise first and second viewing conditions which indicate a range of viewing conditions, and a third viewing condition which is assumed to be frequently used by a user or is a representative viewing condition of the image at the output destination;
a setting section, constructed to set a viewing condition to suppress variation in color representation when color data is represented under a plurality of viewing environments corresponding to the range of viewing conditions, wherein the viewing condition is set based on a weighting calculation among the first and second viewing conditions and a weighting of the third viewing condition;
a calculator, constructed to calculate an ambient light parameter based on the set viewing condition; and
a color processor, constructed to perform conversion of the color data using the ambient light parameter.
2. The apparatus according to claim 1 , wherein the inputting section presents classification information used to input the plurality of viewing conditions.
3. A color processing method comprising the steps of:
inputting a plurality of viewing conditions of an image at an output destination, wherein the plurality of the viewing conditions comprise first and second viewing conditions which indicate a range of viewing conditions, and a third viewing condition which is assumed to be frequently used by a user or is a representative viewing condition of the image at the output destination;
setting a viewing condition to suppress variation in color representation when color data is represented under a plurality of viewing environments corresponding to the range of viewing conditions, wherein the viewing condition is set based on a weighting calculation among the first and second viewing conditions and a weighting of the third viewing condition;
calculating an ambient light parameter based on the set viewing condition; and
performing conversion of the color data using the ambient light parameter.
4. A non-transitory computer-readable medium storing a computer-executable program for causing a computer to perform a color processing method, comprising the steps of:
inputting a plurality of viewing conditions of an image at an output destination, wherein the plurality of the viewing conditions comprise first and second viewing conditions which indicate a range of viewing conditions, and a third viewing condition which is assumed to be frequently used by a user or is a representative viewing condition of the image at the output destination;
setting a viewing condition to suppress variation in color representation when color data is represented under a plurality of viewing environments corresponding to the range of viewing conditions, wherein the viewing condition is set based on a weighting calculation among the first and second viewing conditions and a weighting of the third viewing condition;
calculating an ambient light parameter based on the set viewing condition; and
performing conversion of the color data using the ambient light parameter.