US 12,133,027 B2
Medical control device and medical observation controlling projected illumination
Takamasa Mikami, Tokyo (JP); and Tatsuya Deguchi, Tokyo (JP)
Assigned to Sony Olympus Medical Solutions Inc., Tokyo (JP)
Appl. No. 17/437,843
Filed by Sony Olympus Medical Solutions Inc., Tokyo (JP)
PCT Filed Jan. 10, 2020, PCT No. PCT/JP2020/000748
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/188969, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-051417 (JP), filed on Mar. 19, 2019.
Prior Publication US 2022/0151460 A1, May 19, 2022
Int. Cl. A61B 1/00 (2006.01); A61B 1/045 (2006.01); A61B 1/06 (2006.01); G02B 23/26 (2006.01); H04N 7/18 (2006.01); H04N 23/50 (2023.01)
CPC H04N 7/183 (2013.01) [A61B 1/00006 (2013.01); A61B 1/000095 (2022.02); A61B 1/045 (2013.01); A61B 1/0605 (2022.02); A61B 1/0655 (2022.02); G02B 23/26 (2013.01); H04N 7/18 (2013.01); H04N 23/555 (2023.01)] 5 Claims
OG exemplary drawing
 
1. A medical observation apparatus comprising:
an image sensor configured to generate an electric signal by capturing an image of a subject;
processing circuitry configured to
generate a captured image on a basis of the electric signal generated by the image sensor, and
generate control information for controlling a light quantity distribution of illumination light, according to a brightness distribution of the captured image;
a first optical system having a first light source that emits white light and a projection element that externally projects the light emitted by the first light source according to the control information;
a second optical system having a second light source that emits special light;
light source control circuitry configured to control emission of illumination light on a basis of the control information, wherein
the processing circuit is further configured to:
control the control information for setting a projection region of the white light on a basis of a special light image captured by the image sensor with the special light,
convert the captured image to generate irradiation distribution information indicating the light quantity distribution of the illumination light according to the brightness distribution of the captured image,
convert a special light image captured with special light into a luminance image having a luminance value assigned to each pixel,
generate an irradiation image as the irradiation distribution information by inverting the luminance image such that, in the irradiation image, a region in which a luminance value after the inversion is larger than a threshold is set as a white light projection region, and
generate a merged image obtained by merging the special light image and a white light image captured with white light whose light quantity distribution is commensurate with the irradiation image.