# US 9,439,261 B2 · Light compensating system and method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,439,261 B2 - Document ID: US9439261B2 - Status: Granted - Kind: B2 - Application number: 14/481,353 - Filed: 2014-09-09 - Published: 2015-03-12 - Granted: 2016-09-06 - Earliest claimed: 2013-09-11 - Assignees: Vivotek Inc. - Applicants: Vivotek Inc. - Inventors: Li-Shan Shih; Yi-Chuan Chen; Chih-Hung Chang; Wen-Yuan Li - Web page: https://patentgrep.com/patent/US9439261B2 ## CPC - H04N 23/56: provided with illuminating means - G01J 1/4257: {applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam (monitoring arrangements for lasers in general H01S3/0014)} - H04N 23/71: Circuitry for evaluating the brightness variation - H04N 23/72: Combination of two or more compensation controls - H04N 23/74: by influencing the scene brightness using illuminating means - H05B 45/10: Controlling the intensity of the light - H05B 47/125: by using cameras - Y02B 20/40: Control techniques providing energy savings, e.g. smart controller or presence detection - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A light compensating system in accordance with this invention comprises a plurality of light emitting devices, an image capturing device, and a processing device. The processing device is respectively coupled to the plurality of light emitting devices and the image capturing device. Each light emitting device is used for emitting light to illuminate a certain area in space. The image capturing device is used for capturing a first image, which can be defined as a plurality of image blocks. Each image block is affected by the light from at least one corresponding light emitting device. The processing device is used for analyzing a brightness value of at least one of the plurality image block and adjusting at least one light emitting device corresponding to the analyzed image block based on the brightness value. ## Claims ### Claim 1 A light compensating system, comprising: a plurality of light emitting devices, each of the light emitting devices adapted for emitting light and producing a beam pattern to illuminate different areas; an image capturing device adapted for capturing a first image, wherein the first image comprises a plurality of image blocks and each of the image blocks is affected by the light from at least one corresponding light emitting device, wherein each of the plurality of light emitting devices has a correlation coefficient corresponding to one of the plurality of image blocks, and the correlation coefficient indicates a level of a luminous effect of the corresponding light emitting device upon the corresponding image block; and a processing device adapted for analyzing a brightness value of the at least one image block and adjusting the at least one light emitting device corresponding to the analyzed image block based on the brightness value and the correlation coefficient of the at least one light emitting device. ### Claim 2 (depends on 1) The light compensating system of claim 1, wherein the processing device further determines whether the brightness value is within a first brightness interval to generate a first comparison result, and further adjusts the at least one light emitting device corresponding to the analyzed image block according to the first comparison result. ### Claim 3 (depends on 1) The light compensating system of claim 1, wherein the beam pattern produced by the light emitting devices is a symmetric beam pattern. ### Claim 4 (depends on 1) The light compensating system of claim 1, wherein the beam pattern produced by the light emitting devices is an asymmetric beam pattern. ### Claim 5 (depends on 1) The light compensating system of claim 1, wherein the processing device further executes an object recognition procedure for the first image to extract a foreground object, and analyzes the brightness value of the at least one image block of the image blocks containing the foreground object, and further adjusts the at least one light emitting device corresponding to the analyzed image block based on the brightness value of the analyzed image block. ### Claim 6 (depends on 5) The light compensating system of claim 5, wherein the processing device further determines whether the brightness value of the at least one image block of the image blocks containing the foreground object is within a second brightness interval to generate a second comparison result, and further adjusts the at least one light emitting device corresponding to the analyzed image block according to the second comparison result. ### Claim 7 (depends on 1) The light compensating system of claim 1, wherein the processing device adjusts the at least one light emitting device corresponding to the analyzed image block, including adjusting at least one of a luminous intensity, a beam pattern, and an illumination area of the light emitting device. ### Claim 8 A light compensating method, comprising: using a plurality of light emitting devices to emit light and produce beam pattern for illumination; capturing a first image, wherein the first image comprises a plurality of image blocks and each of the image blocks is affected by the light from at least one corresponding light emitting device, wherein each of the plurality of light emitting devices has a correlation coefficient corresponding to one of the plurality of image blocks, and the correlation coefficient indicates a level of a luminous effect of the corresponding light emitting device upon the corresponding image block; analyzing a brightness value of the at least one image block; and adjusting the at least one light emitting device corresponding to the analyzed image block based on the brightness value and the correlation coefficient of the at least one light emitting device. ### Claim 9 (depends on 8) The light compensating method of claim 8, wherein adjusting the at least one light emitting device corresponding to the analyzed image block comprises: determining whether the brightness value is within a first brightness interval to generate a first comparison result; and adjusting the at least one light emitting device corresponding to the analyzed image block according to the first comparison result. ### Claim 10 (depends on 8) The light compensating method of claim 8, wherein the beam pattern produced by the light emitting devices is a symmetric beam pattern. ### Claim 11 (depends on 8) The light compensating method of claim 8, wherein the beam pattern produced by the light emitting devices is an asymmetric beam pattern. ### Claim 12 (depends on 8) The light compensating method of claim 8, further comprising: executing a object recognition procedure for the first image to extract a foreground object; analyzing the brightness value of the at least one image block of the image blocks containing the foreground object; and adjusting the at least one light emitting device corresponding to the analyzed image block based on the brightness value of the analyzed image block. ### Claim 13 (depends on 12) The light compensating method of claim 12, wherein adjusting the at least one light emitting device corresponding to the analyzed image block comprises: determining whether the brightness value of the at least one image block of the image blocks containing the foreground object is within a second brightness interval to generate a second comparison result; and adjusting the at least one light emitting device corresponding to the analyzed image block according to the second comparison result. ### Claim 14 (depends on 8) The light compensating method of claim 8, wherein adjusting the at least one light emitting device corresponding to the analyzed image block includes adjusting at least one luminous intensity, a beam pattern, or an illumination area of the light emitting device.