Image processing apparatus, image processing method and program, and image display apparatus

An image processing apparatus that converts, according to intensity of light radiated on an image printed based on an input image data, the input image data into image data for illumination output to be superimposed on the image by an illuminating apparatus, the image processing apparatus comprising:

• a producing unit that produces print image data from the input image data using printer gradation converting characteristics;
• a deriving unit that derives an observing condition upon radiation at illumination intensity of the illuminating apparatus;
• an estimating unit that estimates print chromatic characteristics corresponding to the print image data based on the observing condition and reflectance characteristics corresponding to the print image data;
• an introducing unit that introduces target chromatic characteristics in the observing condition based on the print chromatic characteristics;
• a setting unit that sets illumination converting characteristics for converting the input image data into the image for illumination output based on the print chromatic characteristics and the target chromatic characteristics;
• and
• a converting unit that converts gradation of the input image data using the illumination converting characteristics,
• wherein the introducing unit introduces the target chromatic characteristics such that, in a case where reproducing ranges of illumination intensity in the print chromatic characteristics are different, a linear region of output luminance in a case where the reproducing range is relatively large becomes larger than a linear region of output luminance in a case where the reproducing range is relatively small.

A non-transitory computer-readable recording medium storing a readable program for operating a computer to function as each unit of an image processing apparatus that converts, according to intensity of light radiated on an image printed based on an input image data, the input image data into image data for illumination output to be superimposed on the image by an illuminating apparatus, the image processing apparatus comprising:

• a producing unit that produces print image data from the input image data using printer gradation converting characteristics;
• a deriving unit that derives an observing condition upon radiation at illumination intensity of the illuminating apparatus;
• an estimating unit that estimates print luminance characteristics corresponding to the print image data based on the observing condition and reflectance characteristics corresponding to the print image data;
• an introducing unit that introduces target luminance characteristics in the observing condition based on the print luminance characteristics;
• a setting unit that sets illumination converting characteristics for converting the input image data into the image data for illumination output based on the print luminance characteristics and the target luminance characteristics;
• and
• a converting unit that converts gradation of the input image data using the illumination converting characteristics,
• wherein the introducing unit introduces the target luminance characteristics such that, in a case where reproducing ranges of illumination intensity in the print luminance characteristics are different, a linear region of output luminance in a case where the reproducing range is relatively large becomes larger than a linear region of output luminance in a case where the reproducing range is relatively small.

An image processing method at an image processing apparatus that converts, according to intensity of light radiated on an image printed based on an input image data, the input image data into image data for illumination output to be superimposed on the image by an illuminating apparatus, the image processing method comprising:

• producing print image data from the input image data using printer gradation converting characteristics;
• deriving an observing condition upon radiation at illumination intensity of the illuminating apparatus;
• estimating print luminance characteristics corresponding to the print image data based on the observing condition and reflectance characteristics corresponding to the print image data;
• introducing target luminance characteristics in the observing condition based on the print luminance characteristics;
• setting illumination converting characteristics for converting the input image data into the image data for illumination output based on the print luminance characteristics and the target luminance characteristics;
• and
• converting gradation of the input image data using the illumination converting characteristics,
• wherein, in introducing, the target luminance characteristics are introduced such that, in a case where reproducing ranges of illumination intensity in the print luminance characteristics are different, a linear region of output luminance in a case where the reproducing range is relatively large becomes larger than a linear region of output luminance in a case where the reproducing range is relatively small.