Image processing apparatus and image processing method, and program
First Claim
1. An image processing apparatus for picking up and processing an image, comprising:
- an image obtaining unit for obtaining a mosaic image by an image sensor having at least four kinds of filters with different spectral sensitivities, one of the at least four kinds of filters being used for each pixel of the mosaic image; and
an image processing unit for generating a color image such that intensity information at a position of each pixel, the intensity information corresponding to a plurality of colors determined by the spectral sensitivities of the filters, is computed for all pixels of the mosaic image obtained by the image obtaining unit;
wherein in a color filter arrangement of the image sensor of the image obtaining unit, filters possessed by pixels arranged in a checkered manner in half of all the pixels have at least one spectral characteristic having a strong correlation with a spectral characteristic of luminance; and
wherein the image processing unit calculates estimated intensity values of colors possessed by the pixels arranged in the checkered manner at each pixel and calculates a luminance value of each pixel on a basis of the estimated intensity values.
1 Assignment
0 Petitions
Accused Products
Abstract
An image processing apparatus is provided which includes: an image obtaining unit for obtaining a mosaic image by an image sensor having at least four kinds of filters with different spectral sensitivities, one of the at least four kinds of filters being used for each pixel; and an image processing unit for generating a color image such that intensity information at a position of each pixel, the intensity information corresponding to a number of colors determined by the spectral sensitivities of the filters, is computed for all pixels, from the mosaic image obtained by the image obtaining unit. In a color filter arrangement of the image sensor of the image obtaining unit, filters possessed by pixels arranged in a checkered manner in half of all the pixels have at least some spectral characteristics having a strong correlation with the spectral characteristic of luminance. The image processing unit calculates estimated intensity values of colors possessed by the pixels arranged in the checkered manner at each pixel and calculates a luminance value of each pixel on a basis of the estimated intensity values.
-
Citations
32 Claims
-
1. An image processing apparatus for picking up and processing an image, comprising:
-
an image obtaining unit for obtaining a mosaic image by an image sensor having at least four kinds of filters with different spectral sensitivities, one of the at least four kinds of filters being used for each pixel of the mosaic image; and
an image processing unit for generating a color image such that intensity information at a position of each pixel, the intensity information corresponding to a plurality of colors determined by the spectral sensitivities of the filters, is computed for all pixels of the mosaic image obtained by the image obtaining unit;
wherein in a color filter arrangement of the image sensor of the image obtaining unit, filters possessed by pixels arranged in a checkered manner in half of all the pixels have at least one spectral characteristic having a strong correlation with a spectral characteristic of luminance; and
wherein the image processing unit calculates estimated intensity values of colors possessed by the pixels arranged in the checkered manner at each pixel and calculates a luminance value of each pixel on a basis of the estimated intensity values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. An image processing method of an image processing apparatus for picking up and processing an image, the method comprising:
-
an obtaining step for obtaining a mosaic image by an image sensor having at least four kinds of filters with different spectral sensitivities, one of the at least four kinds of filters being used for each pixel of the mosaic image; and
an image processing step for generating a color image such that intensity information at a position of each pixel, the intensity information corresponding to a plurality of colors determined by the spectral sensitivities of the filters, is computed for all pixels of the mosaic image obtained by a process of the obtaining step;
wherein in the step of obtaining, the mosaic image is obtained which has a color arrangement such that filters possessed by pixels arranged in a checkered manner in half of all the pixels have at least some spectral characteristics having a strong correlation with the spectral characteristic of luminance; and
wherein in the step of generating, estimated intensity values are calculated of colors possessed by the pixels arranged in the checkered manner at each pixel, and a luminance value is calculated of each pixel on a basis of the estimated intensity values.
-
-
32. A program for enabling a computer to perform a process of picking up and processing an image, the program comprising:
-
an obtaining step for obtaining a mosaic image by an image sensor having at least four kinds of filters with different spectral sensitivities, one of the at least four kinds of filters being used for each pixel; and
an image processing step for generating a color image such that intensity information at a position of each pixel, the intensity information corresponding to a plurality of colors determined by the spectral sensitivities of the filters, is computed for all pixels, from the mosaic image obtained by the obtaining step;
wherein in the process of the obtaining step, the mosaic image which has a color arrangement such that filters possessed by pixels arranged in a checkered manner in half of all the pixels have at least some spectral characteristics having a strong correlation with a spectral characteristic of luminance is obtained; and
the image processing step includes a calculating step for calculating estimated intensity values of colors possessed by the pixels arranged in the checkered manner at each pixel and a calculating step for calculating a luminance value of each pixel on a basis of the estimated intensity values.
-
Specification