# US 2021/0241056 A1 · Image processing apparatus, image processing method, 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 2021/0241056 A1 - Document ID: US20210241056A1 - Status: Published application - Kind: A1 - Application number: 17/161,869 - 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/US20210241056A1 ## CPC - G06K 15/1872: {Image enhancement} - H04N 1/644: {using a reduced set of representative colours, e.g. each representing a particular range in a colour space} - G06K 15/1886: {Storage of the print image data or of parts thereof} - G06T 5/92: based on global image properties - G06T 7/11: Region-based segmentation - G09G 5/10: Intensity circuits - H04N 1/6005: {with luminance or chrominance signals, e.g. LC1C2, HSL or YUV} - G06T 2207/20208: High dynamic range [HDR] image processing - G09G 2320/066: for control of contrast - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## 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 setting unit configured to set luminance information to be a target of the HDR data obtained by the first obtainment unit; and a conversion unit configured to convert a dynamic range of luminance of the HDR data, which has been obtained by the first obtainment unit and has been set by the setting unit with the luminance information to be the target, 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 setting unit configured to set luminance information to be a target of the HDR data obtained by the first obtainment unit; and a conversion unit configured to convert a dynamic range of luminance of the HDR data, which has been obtained by the first obtainment unit and has been set by the setting unit with the luminance information to be the target, 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 print information is information for specifying a dynamic range to be obtained by the conversion by the conversion unit. ### Claim 3 (depends on 2) The apparatus according to claim 2, wherein the print information includes information which indicates a type of a sheet to be printed. ### Claim 4 (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 5 (depends on 4) The apparatus according to claim 4, wherein the HDR data obtained by the first obtainment unit is pre-luminance conversion data on an output side. ### Claim 6 (depends on 5) The apparatus according to claim 5, 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 7 (depends on 1) The apparatus according to claim 1, further comprising: a third obtainment unit configured to obtain display information of a display apparatus, wherein the setting unit sets the luminance information to be the target based on the display information obtained by the third obtainment unit. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein in a case in which the third obtainment unit is to obtain display information of a plurality of display apparatuses, the setting unit sets the luminance information to be the target based on display information corresponding to the plurality of display apparatuses. ### Claim 9 (depends on 1) The apparatus according to claim 1, further comprising: a storage unit configured to hold the luminance information to be the target. ### Claim 10 (depends on 1) The apparatus according to claim 1, wherein the conversion unit performs dynamic range conversion by using conversion information for converting a dynamic range. ### Claim 11 (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 within a predetermined luminance range. ### Claim 12 (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 13 (depends on 12) The apparatus according to claim 12, wherein the division unit performs region division on a low-frequency component of the image represented by the HDR data. ### Claim 14 (depends on 13) The apparatus according to claim 13, further comprising: a unit configured to perform contrast correction on a high-frequency component of the image represented by the HDR data. ### Claim 15 (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 16 (depends on 1) The apparatus according to claim 1, wherein, in an image transfer function of the HDR data, a tone of each pixel is defined based on a relative luminance value. ### Claim 17 (depends on 1) The apparatus according to claim 1, wherein the HDR data is data defined by an HLG (Hybrid Log Gamma) method. ### Claim 18 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; setting luminance information to be a target of the obtained HDR data; and converting a dynamic range of luminance of the obtained HDR data, which has been set with the luminance information to be the target, into a dynamic range by which printing is to be performed based on the obtained print information. ### Claim 19 (depends on 18) The method according to claim 18, wherein, in an image transfer function of the HDR data, a tone of each pixel is defined based on a relative luminance value. ### Claim 20 (depends on 18) The method according to claim 18, wherein the HDR data is data defined by an HLG (Hybrid Log Gamma) method. ### Claim 21 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; set luminance information to be a target of the obtained HDR data; and convert, a dynamic range of luminance of the obtained HDR data, which has been set with the luminance information to be the target, into a dynamic range by which printing is to be performed based on the obtained print information. ### Claim 22 (depends on 21) The medium according to claim 21, wherein, in an image transfer function of the HDR data, a tone of each pixel is defined based on a relative luminance value. ### Claim 23 (depends on 21) The medium according to claim 21, wherein the HDR data is data defined by an HLG (Hybrid Log Gamma) method.