# US 2021/0241055 A1 · Image processing apparatus, image processing method, and non-transitory computer-readable storage medium storing program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241055 A1 - Document ID: US20210241055A1 - Status: Published application - Kind: A1 - Application number: 17/161,862 - Filed: 2021-01-29 - Published: 2021-08-05 - Earliest claimed: 2020-01-31 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Shinichi Miyazaki - Web page: https://patentgrep.com/patent/US20210241055A1 ## CPC - G06F 3/1208: {resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview} - H04N 1/407: Control or modification of tonal gradation or of extreme levels, e.g. background level - G06T 3/00: Geometric image transformations in the plane of the image - G06T 5/92: based on global image properties - G06T 5/94: based on local image properties, e.g. for local contrast enhancement - H04N 1/6027: {Correction or control of colour gradation or colour contrast (H04N1/6058 takes precedence)} - H04N 1/6058: {Reduction of colour to a range of reproducible colours, e.g. to ink- reproducible colour gamut} - H04N 1/6072: {adapting to different types of images, e.g. characters, graphs, black and white image portions} - H04N 1/6097: {depending on the characteristics of the output medium, e.g. glossy paper, matt paper, transparency or fabrics} - G06K 15/188: {with provisions for treating some of the print data differently} - G06T 2207/20056: Discrete and fast Fourier transform, [DFT, FFT] - G06T 2207/20208: High dynamic range [HDR] image processing - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract An image processing apparatus comprises: a first obtainment unit configured to obtain HDR data which represents a high-dynamic range (HDR) image; a second obtainment unit configured to obtain print information to perform printing based on the HDR data obtained by the first obtainment unit; a third obtainment unit configured to obtain display information of a display apparatus which is to perform display based on the HDR data; and a conversion unit configured to convert, based on the display information obtained by the third obtainment unit, a dynamic range of luminance of the HDR data obtained by the first obtainment unit into a dynamic range by which printing is to be performed based on the print information obtained by the second obtainment unit. ## Claims ### Claim 1 An image processing apparatus comprising: a first obtainment unit configured to obtain HDR data which represents a high-dynamic range (HDR) image; a second obtainment unit configured to obtain print information to perform printing based on the HDR data obtained by the first obtainment unit; a third obtainment unit configured to obtain display information of a display apparatus which is to perform display based on the HDR data; and a conversion unit configured to convert, based on the display information obtained by the third obtainment unit, a dynamic range of luminance of the HDR data obtained by the first obtainment unit into a dynamic range by which printing is to be performed based on the print information obtained by the second obtainment unit. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the display information includes dynamic range information of the display apparatus. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the print information is information for specifying a dynamic range to be obtained by the conversion by the conversion unit. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein the print information includes information which indicates a type of a sheet to be printed. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the HDR data to be obtained by the first obtainment unit is post-luminance conversion data on an image capturing side. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein the HDR data obtained by the first obtainment unit is pre-luminance conversion data on an output side. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein the conversion unit executes luminance conversion on the output side and performs dynamic range conversion on HDR data on which the luminance conversion has been executed. ### Claim 8 (depends on 5) The apparatus according to claim 5, wherein the HDR data obtained by the first obtainment unit is post-luminance conversion data on an output side. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the conversion unit performs dynamic range conversion by using conversion information which corresponds to the display apparatus and is for converting a dynamic range. ### Claim 10 (depends on 1) The apparatus according to claim 1, wherein the conversion unit converts the dynamic range of the luminance of the HDR data obtained by the first obtainment unit into a dynamic range by which printing is to be performed so that input luminance and output luminance will match in a predetermined luminance range. ### Claim 11 (depends on 1) The apparatus according to claim 1, further comprising: a division unit configured to divide an image represented by the HDR data into regions, wherein the conversion unit performs dynamic range conversion by using conversion information which is used to convert a dynamic range and is set for each region divided by the division unit. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the division unit performs region division on a low-frequency component of the image represented by the HDR data. ### Claim 13 (depends on 12) The apparatus according to claim 12, further comprising: a unit configured to perform contrast correction on a high-frequency component of the image represented by the HDR data. ### Claim 14 (depends on 1) The apparatus according to claim 1, further comprising: a printing unit configured to perform printing based on data that has undergone dynamic range conversion by the conversion unit. ### Claim 15 (depends on 1) The apparatus according to claim 1, wherein the display apparatus is an HDR display. ### Claim 16 (depends on 1) The apparatus according to claim 1, wherein the display apparatus is an SDR display. ### Claim 17 An image processing method to be executed in an image processing apparatus, the method comprising: obtaining HDR data which represents a high-dynamic range (HDR) image; obtaining print information to perform printing based on the obtained HDR data; obtaining display information of a display apparatus which is to perform display based on the HDR data; and converting, based on the obtained display information, a dynamic range of luminance of the obtained HDR data into a dynamic range by which printing is to be performed based on the obtained print information. ### Claim 18 A non-transitory computer-readable storage medium storing a program to cause a computer to function to obtain HDR data which represents a high-dynamic range (HDR) image; obtain print information to perform printing based on the obtained HDR data; obtain display information of a display apparatus which is to perform display based on the HDR data; and convert, based on the obtained display information, a dynamic range of luminance of the obtained HDR data into a dynamic range by which printing is to be performed based on the obtained print information.