Image processing apparatus and method, and computer program
AssigneeSony Corporation
InventorYuichi Hasegawa
Life of this patent
Estimating the term…
Abstract
A representative point for pixel value adjustment at which the same pixel value is to be set is selected from each of a correction image to be corrected and a reference image of a mosaic image. A tone curve that defines an output pixel value with respect to an input pixel value is generated by a line that passes through a pixel-value-conversion coordinate point defined by pixel values indicating the representative points selected from the correction image and the reference image, which are set as input and output values. This line is generated by a spline curve. The pixel value of the correction image is converted based on the generated tone curve.
Claims17
An image processing apparatus that generates a mosaic image in which a plurality of images are connected, the mosaic image including a reference image and a correction image to be corrected, the apparatus comprising an image processing unit that corrects a pixel value of the correction image based on the reference image,
- wherein the image processing unit determines a tone curve that defines an output pixel value with respect to an input pixel value, and converts the pixel value of the correction image using the tone curve,
- the tone curve being generated so as to pass through a pixel-value-conversion coordinate point that is defined by a correction-image pixel value and a reference-image pixel value set as input and output values, the correction-image pixel value constituting a pixel-value-adjustment representative point that is selected from the correction image, the reference-image pixel value constituting a pixel-value-adjustment representative point that is selected from the reference image, the pixel-value-adjustment representative points selected from the correction image and the reference image being points at which the same pixel value is to be set, and
- the pixel value of the correction image is converted based on the generated tone curve.
An image processing method for generating a mosaic image in which a plurality of images are connected, the mosaic image including a reference image and a correction image to be corrected, the method comprising:
- a tone curve determining step of determining a tone curve that defines an output pixel value with respect to an input pixel value, the tone curve being generated by a line that passes through a pixel-value conversion coordinate point that is defined by a correction-image pixel value and a reference-image pixel value set as input and output values, the correction-image pixel value constituting a pixel-value-adjustment representative point that is selected from the correction image, the reference-image pixel value constituting a pixel-value-adjustment representative point that is selected from the reference image, the pixel-value-adjustment representative points selected from the correction image and the reference image being points at which the same pixel value is to be set;
- and
- a pixel value converting step of converting the pixel value of the correction image based on the tone curve.
A computer-readable medium comprising instructions which, when executed by a processor, perform a method for generating a mosaic image in which a plurality of images are connected, the mosaic image including a reference image and a correction image to be corrected, the method including:
- determining a tone curve that defines an output pixel value with respect to an input pixel value, the tone curve being generated by a line that passes through a pixel-value-conversion coordinate point that is defined by a correction-image pixel value and a reference-image pixel value set as input and output values, the correction-image pixel value constituting a pixel-value-adjustment representative point that is selected from the correction image, the reference-image pixel value constituting a pixel-value-adjustment representative point that is selected from the reference image, the pixel-value-adjustment representative points selected from the correction image and the reference image being points at which the same pixel value is to be set;
- and
- converting the pixel value of the correction image based on the tone curve.
Dependencies are inferred from the claim text.