Image processing using a profile selection based on photographing condition
AssigneeCanon Kabushiki Kaisha
InventorJun Kiyokawa
Life of this patent
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Abstract
For an image photographed by a digital still camera or the like, color matching cannot be performed because photographing conditions of the image cannot be specified. The effect of a CMS cannot be expected even when one profile is prepared for such an input device as a digital still camera. In this invention, a photographed image and the photographing conditions of the image are input. An input profile closest to the photographing conditions is selected from a plurality of input profiles stored in an external storage. On the basis of the selected input profile, color matching processing is performed on the input image.
Claims15
An image processing apparatus comprising:
- a memory storing reference image data obtained by photographing a reference image including a plurality of color chips, and color data in a device independent color space of the color chips;
- selecting means for selecting, from the reference image data in the memory, reference image data corresponding to a photographing condition of a color image;
- and
- calculating means for calculating, on the basis of photographing data of the color chips obtained from the selected reference image data and color data of the color chips, a conversion characteristic for converting the photographing data into the color data.
An image processing method comprising the steps of:
- selecting, from a memory storing reference image data obtained by photographing a reference image including a plurality of color chips and color data in a device independent color space of the color chips, reference image data corresponding to a photographing condition of a color image;
- acquiring photographing data of the color chips from the selected reference image data;
- acquiring color data of the color chips from said memory;
- and
- calculating, on the basis of the acquired photographing data and color data, a conversion characteristic for converting the photographing data into the color data.
A computer program product comprising a computer readable medium having computer program code, for executing image processing, said product comprising:
- selection process procedure code for selecting, from a memory storing reference image data obtained by photographing a reference image including a plurality of color chips and color data in a device independent color space of the color chips, reference image data corresponding to a photographing condition of a color image;
- first acquisition process procedure code for acquiring photographing data of the color chips from the selected reference image data;
- second acquisition process procedure code for acquiring color data of the color chips from the memory;
- and
- calculation process procedure code for calculating, on the basis of the acquired photographing data and color data, a conversion characteristic for converting the photographing data into the color data.
A computer readable medium color conversion characteristic data for performing color matching processing on image data, wherein the color conversion characteristic data is obtained by image processing comprising the steps of:
- selecting, from a memory storing reference image data obtained by photographing a reference image including a plurality of color chips and color data in a device independent color space of the color chips, reference image data corresponding to a photographing condition of a color image;
- acquiring photographing data of the color chips from the selected reference image data;
- acquiring color data of the color chips from said memory;
- and
- calculating the conversion characteristic data on the basis of the acquired photographing data and color data.
An image processing method comprising the steps of:
- inputting reference image data obtained by photographing a plurality of color chips by an image sensing device and standard values of the color chips;
- performing extrapolation on the basis of the reference image data and the standard values;
- and
- generating color correction data for the image sensing device on the basis of a result of the extrapolation.
A computer program product comprising a computer readable medium having computer program code, for executing image processing, said product comprising:
- input process procedure code for inputting reference image data obtained by photographing a plurality of color chips by an image sensing device and standard values of the color chips;
- correction process procedure code for performing extrapolation on the basis of the reference image data and the standard values;
- and
- generation process procedure code for generating color correction data for the image sensing device on the basis of a result of the extrapolation.
Dependencies are inferred from the claim text.