# US 10,455,125 B2 · Image processing method and device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,125 B2 - Document ID: US10455125B2 - Status: Granted - Kind: B2 - Application number: 15/562,477 - Filed: 2016-03-30 - Published: 2018-05-24 - Granted: 2019-10-22 - Earliest claimed: 2015-04-01 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Byung-seok Min; Jong-man Kim - Web page: https://patentgrep.com/patent/US10455125B2 ## CPC - H04N 1/6061: {involving the consideration or construction of a gamut surface} - G06T 1/00: General purpose image data processing - G09G 5/02: characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} - H04N 1/46: Colour picture communication systems - H04N 1/60: Colour correction or control {(H04N1/54 takes precedence)} - H04N 1/6008: {with primary colour signals, e.g. RGB or CMY(K)} - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2340/06: Colour space transformation - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 method includes obtaining color information of each of a plurality of pixels included in an input image signal; determining whether a color value of each of the plurality of pixels corresponds to a gamut boundary of the input image signal based on the obtained color information; determining a gain value for allowing the color value of at least one of the plurality of pixels to correspond to the gamut boundary, based on a result of the determining; and converting the color value of the at least one pixel based on the determined gain value. ## Claims ### Claim 1 An image processing method comprising: obtaining color information of each of a plurality of pixels included in an input image signal; determining whether a color value of each of the plurality of pixels corresponds to a gamut boundary of the input image signal based on the obtained color information; determining whether a color value of at least one pixel, that is determined to not correspond to the gamut boundary, is included in a preset preservation color; and converting the color value of the at least one pixel according to a gain value determined based on whether the color value of the at least one pixel is included in the preset preservation color, wherein a gain value of a first pixel among the at least one pixel, that has a color value that is included in the preset preservation color, is determined as a threshold value preset to the preservation color, wherein a gain value of a second pixel among the at least one pixel, that has a color value that is not included in the preset preservation color, is determined as a value for allowing the color value to correspond to the gamut boundary, and wherein a threshold value for each of a plurality of preservation colors is set differently. ### Claim 2 (depends on 1) The image processing method of claim 1, further comprising: selecting at least one pixel having the preset preservation color from the plurality of pixels based on the obtained color information. ### Claim 3 (depends on 1) The image processing method of claim 1, further comprising: classifying the plurality of pixels into at least one group based on a preset color value with respect to the input image signal, wherein the gain value of the second pixel is determined with respect to each of the at least one group based on the color information of the pixels included in the at least one classified group. ### Claim 4 (depends on 1) The image processing method of claim 1, further comprising: selecting the pixels included in a preset region from the input image signal, wherein the gain value of the second pixel is determined based on the color information of the selected pixels. ### Claim 5 (depends on 1) The image processing method of claim 1, wherein the gain value of the second pixel is determined based on a predetermined gain value with respect to at least one pixel included in a previously obtained input image signal. ### Claim 6 (depends on 1) The image processing method of claim 1, further comprising: detecting a preset object from the input image signal; and selecting a pixel corresponding to a position of the detected preset object, wherein a gain value of a third pixel among the at least one pixel except for the selected pixel, that has a color value that is not included in the preset preservation color, is determined as a value for allowing the color value to correspond to the gamut boundary. ### Claim 7 (depends on 1) A non-transitory computer readable recording medium having recorded thereon a program for implementing the image processing method of claim 1, by using a computer. ### Claim 8 An image processing apparatus comprising: at least one processor configured to obtain color information of each of a plurality of pixels included in an input image signal, to determine whether a color value of each of the plurality of pixels corresponds to a gamut boundary of the input image signal based on the obtained color information, to determine whether a color value of at least one pixel, that is determined not to correspond to the gamut boundary, is included in a preset preservation color, and to convert the color value of the at least one pixel according to a gain value determined based on whether the color value of the at least one pixel is included in the preset preservation color, wherein a gain value of a first pixel among the at least one pixel, that has a color value that is included in the preset preservation color, is determined as a threshold value preset to the preservation color, wherein a gain value of a second pixel among the at least one pixel, that has a color value that is not included in the preset preservation color, is determined as a value for allowing the color value to correspond to the gamut boundary, and wherein a threshold value for each of a plurality of preservation colors is set differently. ### Claim 9 (depends on 8) The image processing apparatus of claim 8, wherein the at least one processor is further configured to select at least one pixel having the preset preservation color from the plurality of pixels based on the obtained color information. ### Claim 10 (depends on 8) The image processing apparatus of claim 8, wherein the at least one processor is further configured to classify the plurality of pixels into at least one group based on a preset color value with respect to the input image signal, and determine the gain value of the second pixel with respect to each of the at least one group based on the color information of the pixels included in the at least one classified group. ### Claim 11 (depends on 8) The image processing apparatus of claim 8, wherein the at least one processor is further configured to select the pixels included in a preset region from the input image signal, and determine the gain value of the second pixel based on the color information of the selected pixels. ### Claim 12 (depends on 8) The image processing apparatus of claim 8, wherein the at least one processor is further configured to determine the gain value of the second pixel based on a predetermined gain value with respect to at least one pixel included in a previously obtained input image signal. ### Claim 13 (depends on 8) The image processing apparatus of claim 8, wherein the at least one processor is further configured to detect a preset object from the input image signal, to select a pixel corresponding to a position of the detected preset object, and to determine a gain value of a third pixel among the at least one pixel except for the selected pixel, that has a color value that is is not included in the preset preservation color, for allowing the color value to correspond to the gamut boundary.