An image signal processor includes a first sharpening filter configured to perform a first filtering operation on a raw data output from an external image device to output first sharpness data. A second sharpening filter is configured to perform a second filtering operation on the raw data in parallel with the first filtering operation to output second sharpness data. An edge determiner is configured to determine an edge strength of an image corresponding to the raw data based on the raw data and to adjust a first weight and a second weight based on the determined edge strength. A combiner configured to combine first weight data in which the adjusted first weight is reflected in the first sharpness data and second weight data in which the adjusted second weight is reflected in the second sharpness data to generate output data.

A system and method for processing an image including the steps of receiving an input image having a plurality of pixels, wherein each of the plurality of pixels have one or more pixel characteristics; and processing the input image to generate an enhanced image by applying a pixel/image relationship to each of the plurality of pixels of the input image, wherein the pixel/image relationship is arranged to adjust the one or more pixel characteristics of each of the plurality of pixels of the input image.

A display device (101) includes: an output luminance calculation section (83) configured to generate an output luminance for an input luminance for a first reference point residing in a low luminance region, an output luminance for an input luminance for a second reference point residing in a high luminance region, and an output luminance for an input luminance for a third reference point residing between the first and second reference points in such a manner that a straight line connecting the first and third reference points has a different slope than does a straight line connecting the third and second reference points; and a luminance conversion section (85) configured to convert input luminances in the input image to output luminances based on a gamma curve specified using the input and output luminances for the first, second, and third reference points, to output the output image.

A video processing system is provided for reducing distortion in video signals. The system includes a first transfer function that applies a transfer function to a received video signal to generate a gamma corrected video signal in a first color space; and a first matrix component that transforms the gamma corrected video signal in the first color space to a gamma corrected signal in a second color space, and extracts a luminance component from the gamma corrected signal in the second color space. Moreover, the system includes a second transfer function that generates a gamma corrected downsampled video signal in the first color space, and a second matrix component that transforms the gamma corrected video signal in the first color space to a gamma corrected video signal in the second color space, and extracts the chroma component in the second color space.

A video processing system is provided for reducing distortion in video signals. The system includes a first transfer function that applies a transfer function to a received video signal to generate a gamma corrected video signal in a first color space; and a first matrix component that transforms the gamma corrected video signal in the first color space to a gamma corrected signal in a second color space, and extracts a luminance component from the gamma corrected signal in the second color space. Moreover, the system includes a second transfer function that generates a gamma corrected downsampled video signal in the first color space, and a second matrix component that transforms the gamma corrected video signal in the first color space to a gamma corrected video signal in the second color space, and extracts the chroma component in the second color space.

A display device for displaying image data includes: a gradation conversion circuit that converts a gradation of input image data; a display panel that displays the image data with the gradation converted by the gradation conversion circuit; an illuminance sensor that detects illuminance of an environment where the display device is placed; and a gamma characteristic corrector that controls a gradation conversion circuit so as to convert the gradation by use of a gamma characteristic corresponding to the detected illuminance.

A method for calibrating a wearable device includes displaying an image with a plurality of pixels for each of three primary colors using the wearable device, and determining RGB and XYZ values for each of the plurality of pixels. The method includes selecting a subset of the plurality of pixels to form a group of grid points, and dividing the image into a group of tile regions, with each tile region including a grid point. Grid XYZ values are determined for each grid point, based on averaging XYZ values of all pixels in a corresponding tile region, and a grid RGB-to-XYZ conversion matrix is determined for each grid point. The method also includes determining a correction matrix for each grid point by multiplying an inverse of the grid RGB-to-XYZ conversion matrix for the grid with an sRGB-to-XYZ conversion matrix.

A method for calibrating a wearable device includes displaying an image with a plurality of pixels for each of three primary colors using the wearable device, and determining RGB and XYZ values for each of the plurality of pixels. The method includes selecting a subset of the plurality of pixels to form a group of grid points, and dividing the image into a group of tile regions, with each tile region including a grid point. Grid XYZ values are determined for each grid point, based on averaging XYZ values of all pixels in a corresponding tile region, and a grid RGB-to-XYZ conversion matrix is determined for each grid point. The method also includes determining a correction matrix for each grid point by multiplying an inverse of the grid RGB-to-XYZ conversion matrix for the grid with an sRGB-to-XYZ conversion matrix.

A system and method for processing an image including the steps of receiving an input image having a plurality of pixels, wherein each of the plurality of pixels have one or more pixel characteristics; and processing the input image to generate an enhanced image by applying a pixel/image relationship to each of the plurality of pixels of the input image, wherein the pixel/image relationship is arranged to adjust the one or more pixel characteristics of each of the plurality of pixels of the input image.

Techniques described herein include receiving a first video frame including a first color map, receiving at least one second video frame, receiving a third video frame including a second color map, generating at least one color map based on the first color map and the second color map, associating the at least one third color map with the at least one second frame, the associated at least one second frame being sequentially positioned between the first frame and the second frame, tone correcting the associated at least one second frame based on the at least one generated third color map and color correcting the at least one second frame based on the at least one generated third color map.