Image processing device, image processing method, and program

An image processing method of performing an image signal process in an image processing device comprising:

• an edge detection step of enabling an edge detection unit to generate edge information including an edge direction and strength information corresponding to each pixel by interpreting an RGBW arrangement signal which is generated from an RGB pixel and a white (W) pixel;
• a texture detection step of enabling a texture detection unit to generate texture information indicating texture extent corresponding to each pixel by interpreting the RGBW arrangement signal;
• a parameter calculation step of being a parameter calculation step of enabling a parameter calculation unit to calculate the parameter for converting the RGBW arrangement to an RGB arrangement, and to generate the parameter corresponding to an interpolation pixel value calculated by an interpolation process of changing an application pixel position according to the edge direction corresponding to the conversion pixel;
• and
• a blend process step of enabling a blend process unit to input the parameter which the parameter calculation unit calculates and the edge information and the texture information and determine the conversion pixel value by performing the blend process by changing the blend ratio of the parameter which the parameter calculation unit calculates, according to the edge information and the texture information corresponding to the conversion pixel, wherein the parameter calculation step performs the calculation process of calculating the parameter using at least any of first correlation information and second correlation information, the first correlation information on a correlation between the pixel which is the main component of the brightness signal included in the two-dimensional pixel arrangement signal or the color information component of the pixel after conversion, and the second correlation information on a correlation between the color information component of which a distribution rate is the highest among the color information components and the color information component of the pixel after the conversion, in the calculation process of calculating the parameter which are applied to the pixel conversion process;
• wherein the parameter calculation unit selects which one of first correlation information on a correlation between the W pixel configuring the RGBW arrangement signal and the color information component of the pixel after the conversion and second correlation information on a correlation between a green (G) pixel configuring the RGBW arrangement and the color information component of the pixel after the conversion is used, according to 4 kinds of edge directions, longitudinal, traverse, left gradient upward, and right gradient upward, which the edge detection unit detects.

A non-transitory computer-readable medium storing a program for causing the performing of an image signal process in an image processing device, the image signal process comprising:

• an edge detection step of enabling an edge detection unit to generate edge information including an edge direction and strength information corresponding to each pixel by interpreting an RGBW arrangement signal which is generated from an RGB pixel and a white (W) pixel,
• a texture detection step of enabling a texture detection unit to generate texture information indicating texture extent corresponding to each pixel by interpreting the RGBW arrangement signal,
• a parameter calculation step of being a parameter calculation step of enabling a parameter calculation unit to calculate the parameter for converting the RGBW arrangement to the RGB arrangement, and to generate the parameter corresponding to an interpolation pixel value calculated by an interpolation process of changing an application pixel position according to the edge direction corresponding to the conversion pixel, and
• a blend process step of enabling a blend process unit to input the parameter which the parameter calculation unit calculates, the edge information and the texture information and determine the conversion pixel value by performing the blend process by changing the blend ratio of the parameter which the parameter calculation unit calculates, according to the edge information and the texture information corresponding to the conversion pixel,
• wherein the parameter calculation step is caused to perform the calculation process of calculating the parameter using at least any of first correlation information and second correlation information, the first correlation information on a correlation between the pixel which is the main component of the brightness signal included in the two-dimensional pixel arrangement signal and the color information component of the pixel after conversion, and the second correlation information on a correlation between the color information component of which the distribution rate is the highest among the color information components and the color information component of the pixel after the conversion, in the calculation of calculating the parameter which are applied to the pixel conversion process;
• wherein the parameter calculation unit selects which one of first correlation information on a correlation between the W pixel configuring the RGBW arrangement and the color information component of the pixel after the conversion and second correlation information on a correlation between a green (G) pixel configuring the RGBW arrangement and the color information component of the pixel after the conversion is used, according to 4 kinds of edge directions, longitudinal, traverse, left gradient upward, and right gradient upward, which the edge detection unit detects.