US 2020/0007712 A1 · IMAGE PROCESSING APPARATUS, CONTROL METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

Abstract

An image processing apparatus for converting a first image having a first range of a brightness into a second image having a second range of the brightness narrower than the first range obtains information of sizes of the first range and the second range, divides the first image based on the information such that the number of areas obtained by dividing the first image when a ratio of the second range to the first range is a first value becomes smaller than that when the ratio is smaller than the first value, sets, for each of the areas, relationship information that associates input brightness values in the first range with output brightness values in the second range, and converts brightness values of pixels included in the first image into brightness values of pixels of the second image based on the relationship information.

Claims17

Dependent claims

An image processing apparatus for executing image processing of converting a first image having a first range of a brightness into a second image having a second range of the brightness narrower than the first range and outputting the second image, comprising:

at least one processor;
and
at least one memory coupled to the at least one processor, wherein the at least one memory stores a computer program that causes, when executed by the at least one processor, the image processing apparatus to:
obtain information of a size of the first range and information of a size of the second range;
divide the first image based on the obtained information such that the number of areas obtained by dividing the first image in a case in which a ratio of the second range to the first range is a first value becomes smaller than the number in a case in which the ratio is a second value smaller than the first value;
and
set, for each of the areas, relationship information that associates an input brightness value in the first range with an output brightness value in the second range, and converts a brightness value of a pixel included in the first image into a brightness value of a pixel of the second image based on the relationship information, and output the second image obtained by the conversion.

4 more elements

A control method of an image processing apparatus for executing image processing of converting a first image having a first range of a brightness into a second image having a second range of the brightness narrower than the first range and outputting the second image, comprising:

obtaining information of a size of the first range and information of a size of the second range;
dividing the first image based on the obtained information such that the number of areas obtained by dividing the first image in a case in which a ratio of the second range to the first range is a first value becomes smaller than the number in a case in which the ratio is a second value smaller than the first value;
and
setting, for each of the areas, relationship information that associates an input brightness value in the first range with an output brightness value in the second range, and converting a brightness value of a pixel included in the first image into a brightness value of a pixel of the second image based on the relationship information, and outputting the second image obtained by the conversion.

1 more element

Dependencies are inferred from the claim text.

Image processing apparatus, control method, and non-transitory computer-readable storage medium

Life of this patent

Image processing apparatus, control method, and non-transitory computer-readable storage medium

Life of this patent

Abstract

Claims17