# US 10,313,603 B2 · Photograph generation apparatus that controls light source and corrects photograph > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,313,603 B2 - Document ID: US10313603B2 - Status: Granted - Kind: B2 - Application number: 15/833,174 - Filed: 2017-12-06 - Published: 2018-05-10 - Granted: 2019-06-04 - Earliest claimed: 2015-06-10 - Assignees: I-Aurora Co., Ltd. - Applicants: I-Aurora Co., Ltd. - Inventors: Young Su Chang; Hye Kyung Kim; Hoon Kim; Tae Sung Kim; Hye Young Kim; Han Soo Lee - Web page: https://patentgrep.com/patent/US10313603B2 ## CPC - H04N 23/73: by influencing the exposure time - H04N 1/60: Colour correction or control {(H04N1/54 takes precedence)} - H04N 5/265: Mixing - H04N 9/76: for mixing of colour signals (H04N9/75 takes precedence) - H04N 23/56: provided with illuminating means - H04N 23/611: where the recognised objects include parts of the human body - H04N 23/71: Circuitry for evaluating the brightness variation - H04N 23/74: by influencing the scene brightness using illuminating means - H04N 23/80: Camera processing pipelines; Components thereof - H04N 25/58: involving two or more exposures - H04N 1/3871: {the composed originals being of different kinds, e.g. low- and high-resolution originals} - H04N 1/628: {Memory colours, e.g. skin or sky} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A photograph generation apparatus that controls a light source and corrects a picture using an illuminance sensor and a transparent liquid crystal, the photograph generation apparatus includes: a camera part configured to take a photographed picture of a user using the photograph generation apparatus; a lighting part configured to provide lighting for an object to be photographed using the photograph generation apparatus; an illuminance sensor part configured to measure an illuminance within a predetermined range of the photograph generation apparatus to use the measured illuminance in controlling the lighting of the lighting part; and a transparent liquid crystal panel mounted at a front surface of the camera part and configured to control an amount of a light source radiated to the camera part when the picture is being taken. ## Claims ### Claim 1 A photograph generation apparatus that controls a light source and corrects a picture using an illuminance sensor and a transparent liquid crystal, the photograph generation apparatus comprising: a camera part configured to take a photographed picture of a user using the photograph generation apparatus; a lighting part configured to provide lighting for an object to be photographed using the photograph generation apparatus; an illuminance sensor part configured to measure an illuminance within a predetermined range of the photograph generation apparatus to use the measured illuminance in controlling the lighting of the lighting part; and a transparent liquid crystal panel mounted at a front surface of the camera part and configured to control an amount of a light source radiated to the camera part when the picture is being taken, wherein the lighting part and the transparent liquid crystal panel respectively control a brightness of the lighting and opening/closing of the transparent liquid crystal panel on the basis of the illuminance measured by the illuminance sensor, wherein the camera part captures an image of a user to which results of controlling the lighting part and the transparent liquid crystal panel are reflected and generates a photographed picture of the user, wherein the photograph generation apparatus generates an composite image in which the photographed picture of the user and a photograph object are composited, wherein, when generating the composite image, the photograph generation apparatus performs image correcting for each channel for the photographed picture of the user and the photograph object using a pre-installed program and then generates the composite image, wherein the image correcting for each channel includes separating a brightness component and a chromaticity component using color space conversion for each of the photographed picture of the users and the photograph object and enhancing color and contrast of the separated brightness component, wherein the image correcting for each channel further includes performing histogram comparison for the separated brightness component, analyzing an increase in gradation and distribution for each level of gray gradation, and correcting a saturation and correcting a skin color region for each of the photographed picture of the user and the photograph object on the basis of a result of the analysis. ### Claim 2 (depends on 1) The photograph generation apparatus of claim 1, wherein: brightness levels of the lighting provided by the lighting part are classified as Low, Normal, and High; and the lighting part controls the brightness level of the lighting due to the lighting part on the basis of the illuminance measured by the illuminance sensor part. ### Claim 3 (depends on 2) The photograph generation apparatus of claim 2, wherein the lighting part controls the brightness of the lighting to be set as High when the illuminance measured by the illuminance sensor part is a low illuminance that is lower than a predetermined reference, and the lighting part controls the brightness of the lighting to be set as Low when the illuminance measured by the illuminance sensor part is a high illuminance that is higher than the predetermined reference. ### Claim 4 (depends on 3) The photograph generation apparatus of claim 3, wherein: a transmittance of a light source radiated to the camera part is controlled by controlling opening/closing of the transparent liquid crystal panel; and the opening/closing of the transparent liquid crystal panel is controlled on the basis of the illuminance measured by the illuminance sensor part. ### Claim 5 (depends on 4) The photograph generation apparatus of claim 4, wherein the transparent liquid crystal panel is controlled to be open when the illuminance measured by the illuminance sensor part is a low illuminance that is lower than a predetermined reference, and the transparent liquid crystal panel is controlled to be closed when the illuminance measured by illuminance sensor part is a high illuminance that is higher than the predetermined reference. ### Claim 6 (depends on 1) The photograph generation apparatus of claim 1, further comprising a printer configured to print the image in which the photographed picture of the user and the photograph object are composited. ### Claim 7 (depends on 1) The photograph generation apparatus of claim 1, wherein: the image correcting includes one or more of histogram matching, filtering, and color correcting; the histogram matching includes estimating a minimum value and a maximum value for each channel for the photographed picture of the user and the photograph object and performing histogram stretching on the basis of the estimated minimum value and maximum value; the filtering includes processing the photographed picture of the user using a bilateral filter; and the color correcting includes correcting color or correcting skin color through face detection for the photographed picture of the user and the photograph object. ### Claim 8 (depends on 7) The photograph generation apparatus of claim 7, wherein the color correcting is performed by extracting a saturation component using color space conversion, in which brightness and chromaticity are separated, and increasing the extracted saturation component for the photographed picture of the user and the photograph object. ### Claim 9 (depends on 7) The photograph generation apparatus of claim 7, wherein the correcting of the skin color includes detecting a skin color region from each of the photographed picture of the user and the photograph object, comparing the detected skin color region with a predetermined preferred skin color, proportionally calculating a skin color difference between the skin color regions and the predetermined preferred skin color, and correcting the skin color region of each of the photographed picture of the user and the photograph object by the calculated skin color difference. ### Claim 10 (depends on 1) The photograph generation apparatus of claim 1, wherein the image correcting further includes estimating a light source brightness of each of the photographed picture of the user and the photograph object using the Retinex algorithm and correcting the estimated light source brightness. ### Claim 11 (depends on 10) The photograph generation apparatus of claim 10, wherein the correcting of the estimated light source brightness further includes performing multiple Retinex using the estimated light source brightness. ### Claim 12 (depends on 1) The photograph generation apparatus of claim 1, wherein the histogram comparison reduces over-enhancement that occurs when the photographed picture of the user and the photograph object are globally enhanced while maintaining a histogram shape of the brightness component of each of the photographed picture of the user and the photograph object to be constant. ### Claim 13 (depends on 1) The photograph generation apparatus of claim 1, wherein the photograph generation apparatus is a kiosk that includes functions of photographing and editing a picture.