Endoscope insertion direction detection method

Details Endoscope insertion direction detection method Endoscope insertion direction detection method

1988-12-29

1990-03-20

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

128 6, 36441313, 36441315, 36441322, 382 6, A61B 104, A61B 106

Patent

active

049105906

ABSTRACT:
This endoscope insertion direction detection method comprises the steps of forming from the same endoscope image a plurality of picture images different in the number of pixels (or picture elements) and extracting a dark region in the picture image of a predetermined number of pixels by inspecting in the order of the picture images of less pixels the gray levels of the respective pixels in the plurality of picture images formed by the above mentioned forming step, the above mentioned dark region extracted by the above mentioned extracting step being considered to be the endoscope insertion direction. Preferably, the forming step includes gradually forming picture images of less pixels while reducing the number of pixels to 1/4 so that, in the case where the number of pixels is reduced to 1/4, the gray level of one pixel in the picture image of less pixels wil be of an average value of the gray levels of the four son pixels in the 2.times.2 square region in the picture image of more pixels corresponding to this one pixel.

REFERENCES:
patent: 4834070 (1989-05-01), Saitou
"A Highly Parallel Shaded Image Segmentation Method", Khan et al., International Conference on Parallel Architectures for Computer Vision and Display, Jan. 1988, Leeds University.

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