# US 7,204,803 B2 · Endoscope device, endoscope and image processing device for endoscope > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,204,803 B2 - Document ID: US7204803B2 - Status: Granted - Kind: B2 - Application number: 10/647,405 - Filed: 2003-08-25 - Published: 2004-03-11 - Granted: 2007-04-17 - Earliest claimed: 2001-05-16 - Assignees: Olympus Corporation - Inventors: Hitoshi Ueno; Takeshi Ozawa; Kazunari Nakamura; Isami Hirao; Hiroshi Ibe; Koichi Yoshimitsu; Yuichi Morizane; Mamoru Kaneko; Shunya Akimoto; Masaki Terakubo; Katsuichi Imaizumi; Nobuyuki Doguchi; Sakae Takehana - Web page: https://patentgrep.com/patent/US7204803B2 ## CPC - A61B 1/045: Control thereof - A61B 1/00009: {of image signals during a use of endoscope} - A61B 1/00059: {provided with identification means for the endoscope} - A61B 1/00186: {with imaging filters} - A61B 1/043: {for fluorescence imaging} - A61B 1/0638: {providing two or more wavelengths} - A61B 1/0646: {with illumination filters} - A61B 1/0655: {Control therefor} - A61B 1/0669: {at proximal end of an endoscope} - A61B 5/0071: {by measuring fluorescence emission} - A61B 5/0084: {for introduction into the body, e.g. by catheters (A61B5/1459 takes precedence)} - H04N 23/555: {for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes} - Y10S 600/921: Manipulating image characteristics - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An image processing device for an endoscope, wherein a wavelength band filter for shielding at least a part of the blue wavelength band is disposed in front of an image pickup element built into the endoscope, for image processing the signal output by said image pickup element includes means for generating color image signals whilst switching between a normal-light image mode using white light and a fluorescence image mode including fluorescence information and adjusting means for adjusting the gain of a prescribed color signal of said color image signals. ## Claims ### Claim 1 An image processing device for an endoscope, wherein an excitation light shielding filter, effective for shielding excitation light when in a fluorescence image mode and for transmitting light other than a part of blue wavelength band, is disposed in front of an image pickup element built into the endoscope, for image processing the signal outputted by said image pickup element, and generating color image signals while switching between a normal-light image mode using white light and the fluorescence image mode including fluorescence information, the device comprising: a first white balance section that performs gain adjustment so that the output intensity of each of red, green and blue signals may be of a constant value, and adjusts the gain of a prescribed color signal of the color image signals when in the normal-light image mode; a second white balance setting section that stores the gain adjustment values of the red, green and blue signals in the white balance section, and attenuates the blue gain to a prescribed value; a parameter setting section that obtains a mode signal from a control section and determines whether to output a parameter for a fluorescence image or a parameter for a normal-light image to output a parameter suited to the mode; and a matrix section that applies prescribed matrix calculations to the red, green and blue signals subjected to the gain adjustment in the first white balance section using a parameter suited to the mode outputted by the parameter setting section to generate the fluorescence image signal or the normal-light image signal. ### Claim 2 (depends on 1) The image processing device for an endoscope according to claim 1, comprising a further signal generator which generates a blue signal using a prescribed color signal of said color image signals, when in said normal-light image mode. ### Claim 3 (depends on 1) The image processing device for an endoscope according to claim 1, wherein said first white balance section attenuates the blue gain. ### Claim 4 (depends on 1) The image processing device for an endoscope according to claim 1, wherein said first white balance section amplifies the red and green gain. ### Claim 5 (depends on 1) The image processing device for an endoscope according to claim 1, wherein said first white balance section calculates an intensity of color elements using the red and blue or green color signals and sets gain adjustments amounts. ### Claim 6 (depends on 2) The image processing device for an endoscope according to claim 2, wherein said further signal generator forms a blue signal by adjusting the gain of a prescribed color signal. ### Claim 7 (depends on 1) The image processing device for an endoscope according to claim 1, comprising a further control section which inputs information relating to the type of said endoscope connected thereto, and controls said white balance sections on the basis of this information. ### Claim 8 (depends on 2) The image processing device for an endoscope according to claim 2, comprising a further control section for controlling said further signal generator. ### Claim 9 (depends on 3) The image processing device for an endoscope according to claim 3, wherein said gain attenuation is in the range of 15% to 30%. ### Claim 10 (depends on 4) The image processing device for an endoscope according to claim 4, wherein said gain amplification is in the range of 18% to 42%. ### Claim 11 (depends on 6) The image processing device for an endoscope according to claim 6, wherein the prescribed color signal which is gain adjusted by said further signal generator is a green signal. ### Claim 12 (depends on 10) The image processing device for an endoscope according to claim 10, wherein said gain adjustment is attenuated to 40%.