# US 12,599,295 B2 · Control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,599,295 B2 - Document ID: US12599295B2 - Status: Granted - Kind: B2 - Application number: 18/748,259 - Filed: 2024-06-20 - Published: 2024-12-26 - Granted: 2026-04-14 - Earliest claimed: 2023-06-23 - Assignees: Olympus Medical Systems Corp. - Applicants: Olympus Medical Systems Corp. - Inventors: Takeshi Ito - Web page: https://patentgrep.com/patent/US12599295B2 ## CPC - A61B 1/0638: {providing two or more wavelengths} - A61B 1/000094: {extracting biological structures} - A61B 1/043: {for fluorescence imaging} - A61B 1/0655: {Control therefor} - H04N 5/265: Mixing - H04N 23/11: for generating image signals from visible and infrared light wavelengths - H04N 23/12: with one sensor only - H04N 23/555: {for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes} - H04N 23/56: provided with illuminating means - H04N 23/72: Combination of two or more compensation controls - H04N 23/74: by influencing the scene brightness using illuminating means - H04N 23/76: by influencing the image signals - H04N 23/88: for colour balance, e.g. white-balance circuits or colour temperature control - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A control device includes one or more processors including hardware, the one or more processors being configured to: generate a white light image based on a first image signal captured as a result of irradiating a subject with a white light; generate a narrow-band light image based on a second image signal captured as a result of irradiating the subject with a narrow-band light; control a light intensity of the white light to a first value which is determine according to brightness of the white light image and according to a first ratio; and control a light intensity of the narrow-band light to a second value which is determine according to brightness of the narrow-band light image and according to a second ratio that is different than the first ratio. ## Claims ### Claim 1 A control device comprising: one or more processors comprising hardware, the one or more processors being configured to: generate a white light image based on a first image signal captured as a result of irradiating a subject with a white light; generate a first narrow-band light image based on a second image signal captured as a result of irradiating the subject with a first narrow-band light; generate a second narrow-band light image based on a third image signal captured as a result of irradiating the subject with a second narrow-band light, control a light intensity of the white light to a first value which is determined according to brightness of the white light image and according to a first ratio, wherein: when brightness of the first narrow-band light image is equal to or greater than a threshold value, the one or more processors being configured to control a light intensity of the first narrow-band light to be equal to a first predetermined light intensity, and when brightness of the second narrow-band light image is equal to or greater than a threshold value, the one or more processors being configured to control a light intensity of the second narrow-band light to be equal to a second predetermined light intensity. ### Claim 2 (depends on 1) The control device according to claim 1, wherein the one or more processors being configured to control the light intensity of the white light such that the brightness of a normal light image becomes constant. ### Claim 3 (depends on 1) The control device according to claim 1, wherein the first predetermined light intensity and second predetermined light intensity is set according to a predetermined value, a parameter related to the narrow-band light image, a parameter related to a device comprising an image sensor configured to perform imaging of the subject, an observation mode, or observation distance. ### Claim 4 (depends on 1) The control device according to claim 1, wherein the first predetermined light intensity is set according to a parameter related to the first narrow-band light image, and the second predetermined light intensity is set to a predetermined value. ### Claim 5 (depends on 1) The control device according to claim 1, wherein in a first observation mode, the one or more processors being configured to set the first predetermined light intensity to be greater than the second predetermined light intensity, and in a second observation mode, the one or more processors being configured to set the second predetermined light intensity to be greater than the first predetermined light intensity. ### Claim 6 (depends on 5) The control device according to claim 5, wherein the first observation mode and the second observation mode are switchable according to a user operation. ### Claim 7 (depends on 1) The control device according to claim 1, wherein the one or more processors being configured to generate an image obtained by performing a gain correction with respect to the narrow-band light image such that the brightness of the narrow-band light image is equal to a predetermined value. ### Claim 8 (depends on 1) The control device according to claim 1, wherein the one or more processors being configured to generate an image obtained by performing a gain correction with respect to the narrow-band light image such that the brightness of the narrow-band light image is equal to or greater than a predetermined value. ### Claim 9 (depends on 7) The control device according to claim 7, wherein the one or more processors being configured to set a gain with respect to the narrow-band light to a third value which is determined according to the brightness of the narrow-band light image and according to a third ratio. ### Claim 10 (depends on 9) The control device according to claim 9, wherein the one or more processors being configured to set a gain with respect to the white light image and a gain with respect to the narrow-band light image such that a ratio between the brightness of the white light image and the brightness of the narrow-band light image becomes substantially constant. ### Claim 11 (depends on 1) The control device according to claim 1, wherein the one or more processors being configured to generate a superimposed image by superimposing the white light image and one of the first narrow-band light image or second narrow-band light image. ### Claim 12 (depends on 11) The control device according to claim 11, wherein the one or more processors being configured to generate the superimposed image by correcting color balance of the white light image such that there is a decrease in a component corresponding to the narrow-band light in the superimposed image. ### Claim 13 (depends on 12) The control device according to claim 12, wherein the one or more processors being configured to generate the superimposed image by adjusting color balance of the white light image such that a maximum contrast is achieved between a region of interest in the narrow-band light image and background other than the region of interest. ### Claim 14 (depends on 12) The control device according to claim 12, wherein the one or more processors being configured to correct the color balance of the white light image such that background of the superimposed image has a same color shade as a color shade of background of the white light image. ### Claim 15 (depends on 11) The control device according to claim 11, wherein the one or more processors being configured to correct light intensity balance of the white light such that there is a decrease in a component corresponding to the narrow-band light in the superimposed image. ### Claim 16 (depends on 15) The control device according to claim 15, wherein the one or more processors being configured to correct the light intensity balance of the white light image such that a maximum contrast is achieved between a region of interest in the narrow-band light image and background other than the region of interest. ### Claim 17 (depends on 15) The control device according to claim 15, wherein the one or more processors is configured to correct the light intensity balance of the white light such that background of the superimposed image has a same color shade as a color shade of background of the normal light image. ### Claim 18 (depends on 1) An endoscope system comprising: the control device according to claim 1; a light source device configured to irradiate the normal light and the narrow-band light; and an endoscope configured to output first and second signals.