# US 2019/0174047 A1 · Method and device for photographing images > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0174047 A1 - Document ID: US20190174047A1 - Status: Published application - Kind: A1 - Application number: 16/178,549 - Filed: 2018-11-01 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Heng SUN; Zhehong LIN - Web page: https://patentgrep.com/patent/US20190174047A1 ## CPC - H04N 23/74: by influencing the scene brightness using illuminating means - G03B 7/08: Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device - G03B 7/17: Selection of modes in flash units by exposure control arrangements - G03B 15/02: Illuminating scene - G03B 30/00: Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles - H04N 23/56: provided with illuminating means - H04N 23/71: Circuitry for evaluating the brightness variation - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract A method for photographing images, applied to a mobile terminal having a source, the method including: obtaining a current ambient light intensity; determining a target luminous intensity based on the current ambient light intensity, wherein the target luminous intensity is a luminous intensity of the light source upon a photographing operation is performed; and controlling the light source to emit light according to the target luminous intensity. ## Claims ### Claim 1 A method for photographing images, applied to a mobile terminal having a source, the method comprising: obtaining a current ambient light intensity; determining a target luminous intensity based on the current ambient light intensity, wherein the target luminous intensity is a luminous intensity of the light source upon a photographing operation is performed; and controlling the light source to emit light according to the target luminous intensity. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: detecting the ambient light intensity during every preset period upon a front camera component being turned on; wherein obtaining the current ambient light intensity comprises: obtaining the ambient light intensity detected in a period closest to a current time point as the current ambient light intensity. ### Claim 3 (depends on 1) The method according to claim 1, wherein the determining the target luminous intensity based on the current ambient light intensity comprises: determining the target luminous intensity corresponding to an ambient light intensity range to which the current ambient light intensity belongs according to a correspondence relationship between the ambient light intensity range and the luminous intensity of the light source upon the photographing operation being performed. ### Claim 4 (depends on 1) The method according to claim 1, wherein the controlling the light source to emit light according to the target luminous intensity comprises: controlling the light source to emit light according to the current ambient light intensity and the target luminous intensity. ### Claim 5 (depends on 4) The method according to claim 4, wherein the controlling the light source to emit light according to the current ambient light intensity and the target luminous intensity comprises: determining an initial luminous intensity of the light source according to the current ambient light intensity; and controlling the luminous intensity of the light source to change from the initial luminous intensity to the target luminous intensity according to a preset rule. ### Claim 6 (depends on 5) The method according to claim 5, wherein the determining the initial luminous intensity of the light source according to the current ambient light intensity comprises: determining the initial luminous intensity of the light source by subtracting a preset value from the current ambient light intensity. ### Claim 7 (depends on 5) The method according to claim 5, wherein the controlling the luminous intensity of the soft light lamp to change from the initial luminous intensity to the target luminous intensity according to the preset rule comprises: obtaining a preset time difference between detecting a photographing instruction and performing the photographing operation, and determining a luminous intensity difference of the target luminous intensity and the initial luminous intensity; determining an adjusting step according to the luminous intensity difference and the time difference; and controlling the luminous intensity of the soft light lamp to change from the initial luminous intensity to the target luminous intensity according to the adjusting step. ### Claim 9 (depends on 1) The method according to claim 1, wherein the light source comprises a soft light lamp. ### Claim 10 (depends on 1) The method according to claim 1, wherein the light source comprises a display screen of the mobile terminal. ### Claim 11 A device comprising: a light source; a processing circuit; and memory configured to store instructions executable by the processing circuit, wherein the processing circuit is configured to: obtain a current ambient light intensity; determine a target luminous intensity based on the current ambient light intensity, wherein the target luminous intensity is a luminous intensity of the light source when a photographing operation is performed; and control the light source to emit light according to the target luminous intensity. ### Claim 12 (depends on 11) The device according to claim 11, wherein the processing circuit is further configured to: detect the ambient light intensity during every preset period upon a camera being turned on; obtain the ambient light intensity detected in a period closest to a current time point as the current ambient light intensity. ### Claim 13 (depends on 11) The device according to claim 11, wherein the processing circuit is further configured to: determine the target luminous intensity corresponding to an ambient light intensity range to which the current ambient light intensity belongs according to a correspondence relationship between the ambient light intensity range and the luminous intensity of the soft light lamp when the photographing operation is performed. ### Claim 14 (depends on 11) The device according to claim 11, wherein the processing circuit is further configured to: control the light source to emit light according to the current ambient light intensity and the target luminous intensity. ### Claim 15 (depends on 14) The device according to claim 14, wherein the processing circuit is further configured to: determine an initial luminous intensity of the light source according to the current ambient light intensity; and control the luminous intensity of the light source to change from the initial luminous intensity to the target luminous intensity according to a preset rule. ### Claim 16 (depends on 15) The device according to claim 15, wherein the processing circuit is further configured to: determine the initial luminous intensity of the light source by subtracting a preset value from the current ambient light intensity. ### Claim 17 (depends on 15) The device according to claim 15, wherein, the processing circuit is further configured to: obtain a preset time difference between detecting a photographing instruction and performing the photographing operation, and determine a luminous intensity difference of the target luminous intensity and the initial luminous intensity; determine an adjusting step according to the luminous intensity difference and time difference; control the luminous intensity of the light source to change from the initial luminous intensity to the target luminous intensity according to the adjusting step. ### Claim 18 (depends on 17) The device according to claim 17, wherein the light source comprises a soft light lamp. ### Claim 19 (depends on 17) The device according to claim 17, wherein the light source comprises a display screen of the device, and wherein the display screen is configured to be controlled by the processing circuit to realize a soft light output to improve image quality of the photographing operation. ### Claim 20 A non-transitory computer-readable storage medium having stored thereon instructions configured to be loaded and performed by a processing circuit to implement a method for photographing images, the method comprising: obtaining a current ambient light intensity; determining a target luminous intensity according to the current ambient light intensity, wherein the target luminous intensity is a luminous intensity of a soft light lamp when photographing operation is performed; and controlling the soft light lamp to emit light according to the target luminous intensity and performing the photographing operation.