# US 2021/0243368 A1 · Wide-angle image providing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243368 A1 - Document ID: US20210243368A1 - Status: Published application - Kind: A1 - Application number: 17/050,461 - Filed: 2019-04-26 - Published: 2021-08-05 - Earliest claimed: 2018-04-26 - Assignees: Tenntwo Co., Ltd. - Applicants: Tenntwo Co., Ltd. - Inventors: Seong Yeul PARK - Web page: https://patentgrep.com/patent/US20210243368A1 ## CPC - H04N 23/951: by using two or more images to influence resolution, frame rate or aspect ratio - G06T 5/50: using two or more images, e.g. averaging or subtraction - G06T 5/80: Geometric correction - G06T 7/80: Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration - H04N 7/183: {for receiving images from a single remote source} - H04N 9/68: for controlling the amplitude of colour signals, e.g. automatic chroma control circuits (H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86) - H04N 17/002: {for television cameras} - H04N 23/45: for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images - H04N 23/51: Housings - H04N 23/698: for achieving an enlarged field of view, e.g. panoramic image capture - G06T 2207/10016: Video; Image sequence - G06T 2207/10024: Color image - G06T 2207/30232: Surveillance - H04N 23/90: Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract The present invention relates to a wide-angle image providing method including: an image taking step of generating a first region image obtained by taking an image of a first region and generating a second region image obtained by taking an image of a second region adjacent to the first region by a second camera module; a distortion calibration step of correcting distortion of each of the first and second region images by a distortion calibration unit; a phase difference calibration step of correcting a phase difference of each of the first and second region images; an overlap calibration step of correcting the first and second region images while overlapping the first and second region images to be adjacent to each other by an overlap calibration unit; and a color calibration step of correcting colors of the first and second region images which have been overlapped and calibrated. ## Claims ### Claim 1 A method of providing a wide-angle image, comprising: a photographing step of generating, by a first camera module, a first area image of a first area and generating, by a second camera module, a second area image of a second area neighboring the first area; a distortion calibration step of calibrating, by a distortion calibration unit, distortion of each of the first and second area images; a phase difference calibration step of calibrating, by a phase difference calibration unit, a phase difference between the first and second area images whose distortion has been calibrated; an overlap calibration step of calibrating, by an overlap calibration unit, the first and second area images whose phases have been calibrated in an overlap manner so that the first and second area images neighbor each other; and a color calibration step of calibrating, by a color calibration unit, a color of the superimposed and calibrated first and second images. ### Claim 2 (depends on 1) The method of claim 1, wherein: the distortion calibration step comprises calibrating, by the distortion calibration unit, wide-angle distortion of each of the first and second area images and then calibrating distance distortion, the phase difference calibration step comprises extracting, by the phase difference calibration unit, a horizontal reference point of the first and second area images and then adjusting locations of the first and second area images by rotating and moving coordinates, the overlap calibration step comprises adjusting, by the overlap calibration unit, a size of each of the first and second area images and then adjusting locations of the first and second area images so that the first and second area images are superimposed by moving the coordinates, and the color calibration step comprises calibrating, by the color calibration unit, brightness and chromatic aberration of the superimposed and calibrated overlap image. ### Claim 3 (depends on 1) The method of claim 1, wherein the photographing step further comprises a step of adjusting an angle formed by the first and second camera modules. ### Claim 4 A method of providing a wide-angle image, comprising: a photographing step of generating, by a first camera module, a first area image of a first area, generating, by a second camera module, a second area image of a second area neighboring a right of the first area, generating, by a third camera module, a third area image of a third area neighboring a lower side of the first area, and generating, by a fourth camera module, a fourth area image of a fourth area neighboring a lower side of the second area and a right of the third area; a distortion calibration step of calibrating, by a distortion calibration unit, distortion of each of the first, second, third and fourth area images; a phase difference calibration step of calibrating, by a phase difference calibration unit, a phase difference of each of the first, second, third and fourth area images whose distortion has been calibrated; an overlap calibration step of calibrating, by an overlap calibration unit, the first, second, third and fourth area images whose phases have been calibrated in an overlap manner so that the first, second, third and fourth area images neighbor each other; and a color calibration step of calibrating, by a color calibration unit, a color of the superimposed and calibrated overlap image. ### Claim 5 (depends on 4) The method of claim 4, wherein: the distortion calibration step comprises calibrating, by the distortion calibration unit, wide-angle distortion of each of the first, second, third and fourth area images and then calibrating distance distortion, the phase difference calibration step comprises extracting, by the phase difference calibration unit, a horizontal reference point of the first, second, third and fourth area images and then adjusting locations of the first, second, third and fourth area images by rotating and moving coordinates, the overlap calibration step comprises adjusting, by the overlap calibration unit, a size of each of the first, second, third and fourth area images and then adjusting locations of the first, second, third and fourth area images so that the first, second, third and fourth area images are superimposed by moving the coordinates, and the color calibration step comprises adjusting, by the color calibration unit, brightness and chromatic aberration of the superimposed and calibrated overlap image. ### Claim 6 (depends on 4) The method of claim 4, wherein the photographing step further comprises a step of adjusting an angle formed between the first, second, third and fourth camera modules. ### Claim 7 A method of providing a wide-angle image, comprising: a photographing step of generating, by a first camera module, a first area image of a first area, generating, by a second camera module, a second area image of a second area neighboring a right of the first area, generating, by a third camera module, a third area image of a third area which is an opposite side of the first area, and generating, by a fourth camera module, a fourth area image of a fourth area which is an opposite side of the second area and neighbors a left of the third area; a distortion calibration step of calibrating, by a distortion calibration unit, distortion of each of the first, second, third and fourth area images; a phase difference calibration step of calibrating, by a phase difference calibration unit, a phase difference of each of the first, second, third and fourth area images whose distortion has been calibrated; an overlap calibration step of calibrating, by an overlap calibration unit, the first, second, third and fourth area images whose phases have been calibrated in an overlap manner so that the first, second, third and fourth area images neighbor each other; and a color calibration step of calibrating, by a color calibration unit, a color of the superimposed and calibrated overlap image. ### Claim 8 (depends on 7) The method of claim 7, wherein: the distortion calibration step comprises calibrating, by the distortion calibration unit, wide-angle distortion of each of the first, second, third and fourth area images and then calibrating distance distortion, the phase difference calibration step comprises extracting, by the phase difference calibration unit, a horizontal reference point of the first, second, third and fourth area images and then adjusting locations of the first, second, third and fourth area images by rotating and moving coordinates, the overlap calibration step comprises adjusting, by the overlap calibration unit, a size of each of the first, second, third and fourth area images and then adjusting locations of the first, second, third and fourth area images so that the first, second, third and fourth area images are superimposed by moving the coordinates, and the color calibration step comprises adjusting, by the color calibration unit, brightness and chromatic aberration of the superimposed and calibrated overlap image. ### Claim 9 (depends on 7) The method of claim 7, wherein the photographing step further comprises steps of: adjusting an angle formed by the first and second camera modules; and adjusting an angle formed by the third and fourth camera modules.