# US 10,122,937 B2 · Method and apparatus for processing image obtained by camera > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,937 B2 - Document ID: US10122937B2 - Status: Granted - Kind: B2 - Application number: 15/467,097 - Filed: 2017-03-23 - Published: 2017-09-28 - Granted: 2018-11-06 - Earliest claimed: 2016-03-28 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sang-jun Yu - Web page: https://patentgrep.com/patent/US10122937B2 ## CPC - H04N 23/745: Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method of processing an image obtained by a camera includes: obtaining the image using an image sensor; identifying an image signal in a direction perpendicular to a line scan direction of the image sensor, with respect to at least one region of the image; detecting a signal indicating a flicker, using the image signal; and generating an image in which a flicker is corrected, based on the signal indicating a flicker and the image. ## Claims ### Claim 1 A method of processing an image obtained by a camera, the method comprising: obtaining the image using an image sensor; identifying an image signal in a direction perpendicular to a line scan direction of the image sensor, with respect to at least one region of the image; determining an average of the image signal as a reference signal; detecting a signal indicating a flicker based on a ratio of the image signal to the reference signal; and generating an image in which a flicker is corrected, based on the signal indicating a flicker and the image. ### Claim 2 (depends on 1) The method of claim 1, wherein the identifying of the image signal comprises: dividing the at least one region of the image into a plurality of blocks, and identifying the signal indicating a flicker, by identifying an image signal of at least one of the plurality of blocks. ### Claim 3 (depends on 2) The method of claim 2, wherein the dividing of the at least one region of the image comprises dividing the image into a first number of blocks in a vertical direction and a second number of blocks in a horizontal direction, wherein the first number is set to be greater than a number of lines in which flicker occurs. ### Claim 4 (depends on 1) The method of claim 1, further comprising: comparing the image signal with the reference signal. ### Claim 5 (depends on 1) The method of claim 1, wherein the detecting of the signal comprises: determining the signal indicating a flicker from the image signal, when the ratio of the image signal to the reference signal corresponds to a sine wave shape. ### Claim 6 (depends on 1) The method of claim 1, wherein the generating of the image comprises: identifying a gain signal with respect to the signal indicating a flicker, and generating the image in which a flicker is corrected, by multiplying the image signal by the gain signal. ### Claim 7 (depends on 6) The method of claim 6, wherein the generating of the image comprises: determining the gain signal based on a ratio of the reference signal to the image signal. ### Claim 8 (depends on 1) The method of claim 1, wherein the generating of the image is performed together with correcting a lens shading phenomenon of the image. ### Claim 9 An electronic device configured to process an image obtained by a camera, the electronic device comprising: an image sensor configured to obtain the image; and a controller configured to identify an image signal in a direction perpendicular to a line scan direction of the image sensor with respect to at least one region of the image, to determine an average of the image signal as a reference signal, to detect a signal indicating a flicker based on a ratio of the image signal to the reference signal, and to generate an image in which a flicker is corrected, based on the signal indicating a flicker and the image. ### Claim 10 (depends on 9) The electronic device of claim 9, wherein the controller is configured to divide the at least one region of the image into a plurality of blocks, and to identify the signal indicating a flicker by identifying an image signal of at least one of the plurality of blocks. ### Claim 11 (depends on 10) The electronic device of claim 10, wherein the controller is configured to divide the image into a first number of blocks in a vertical direction and a second number of blocks in a horizontal direction, wherein the first number is set to be greater than the number of lines in which flickers occur. ### Claim 12 (depends on 9) The electronic device of claim 9, wherein the controller is configured to compare the image signal with the reference signal. ### Claim 13 (depends on 9) The electronic device of claim 9, wherein the controller is configured to determine the signal indicating a flicker from the image signal, when the ratio of the image signal to the reference signal corresponds to a sine wave shape. ### Claim 14 (depends on 9) The electronic device of claim 9, wherein the controller is configured to identify a gain signal with respect to the signal indicating a flicker, and to generate the image in which a flicker is corrected by multiplying the image signal by the gain signal. ### Claim 15 (depends on 14) The electronic device of claim 14, wherein the controller is configured to determine the gain signal based on a ratio of the reference signal to the image signal. ### Claim 16 (depends on 9) The electronic device of claim 9, wherein the controller is configured to generate the image in which a flicker is corrected, while correcting a lens shading phenomenon of the image. ### Claim 17 (depends on 1) A non-transitory computer-readable recording medium having recorded thereon a computer program for executing the method of claim 1.