US 10,380,725 B2 · Image processing apparatus, image processing method, and storage medium

Abstract

Image processing apparatuses, methods and storage mediums for use therewith are provided herein. At least one image processing apparatus includes, a first acquisition unit configured to, in order to generate a converted image having a narrower dynamic range than an input image, acquire gradation values of a plurality of neighborhood pixels positioned in a predetermined range from a processing target pixel of the input image, a second acquisition unit configured to acquire conversion information from a holding unit holding the conversion information used to generate the converted image having a narrower dynamic range than the input image, and a determination unit configured to determine a gradation value of a pixel on the converted image corresponding to the processing target pixel by using the gradation values of the plurality of neighborhood pixels acquired by the first acquisition unit and the conversion information acquired by the second acquisition unit.

Claims18

Dependent claims

An image processing apparatus generating an image for displaying an input image with dynamic range smaller than the dynamic range of the input image by a display device, the image processing apparatus comprising:

one or more processors that operate to:
perform a first process of expanding a contrast of a light portion on the input image;
perform a second process of expanding a contrast of an intermediate portion on the input image;
perform a third process of expanding a contrast of a dark portion on the input image;
acquire gradation values of a plurality of neighborhood pixels positioned in a predetermined range from a processing target pixel of the input image;
and
determine a gradation value of a pixel on a converted image corresponding to the processing target pixel by using the acquired gradation values of the plurality of neighborhood pixels, the converted gradation values output by the first process, the converted gradation values output by the second process, and the converted gradation values output by the third process.

4 more elements

An image processing method for generating an image for displaying an input image with dynamic range smaller than the dynamic range of the input image by a display device, the image processing method comprising:

performing a first process of expanding a contrast of a light portion on the input image;
performing a second process of expanding a contrast of an intermediate portion on the input image;
performing a third process of expanding a contrast of a dark portion on the input image;
acquiring, in order to generate a converted image having a narrower dynamic range than an input image, gradation values of a plurality of neighborhood pixels positioned in a predetermined range from a processing target pixel of the input image;
and
determining a gradation value of a pixel on a converted image corresponding to the processing target pixel by using the acquired gradation values of the plurality of neighborhood pixels, the converted gradation values output by the first process, the converted gradation values output by the second process, and the converted gradation values output by the third process.

3 more elements

A non-transitory computer-readable storage medium storing a program for causing a computer to execute an image processing method for generating an image for displaying an input image with dynamic range smaller than the dynamic range of the input image by a display device, the image processing method comprising:

performing a first process of expanding a contrast of a light portion on the input image;
performing a second process of expanding a contrast of an intermediate portion on the input image;
performing a third process of expanding a contrast of a dark portion on the input image;
acquiring, in order to generate a converted image having a narrower dynamic range than an input image, gradation values of a plurality of neighborhood pixels positioned in a predetermined range from a processing target pixel of the input image;
and
determining a gradation value of a pixel on a converted image corresponding to the processing target pixel by using the acquired gradation values of the plurality of neighborhood pixels, the converted gradation values output by the first process, the converted gradation values output by the second process, and the converted gradation values output by the third process.

3 more elements

Dependencies are inferred from the claim text.

Image processing apparatus, image processing method, and storage medium

Life of this patent

Image processing apparatus, image processing method, and storage medium

Life of this patent

Abstract

Claims18