Endoscope apparatus and method of measuring object
First Claim
1. An endoscope apparatus comprising:
- an image pickup device that picks up an image of an object; and
a controller configured to function as a measurement portion that measures the object based on the image of the object obtained by the image pickup device;
wherein the measurement portion comprises;
a specification portion that specifies three base points on the image;
a base ellipse calculation portion that calculates a base ellipse based on the three base points specified by the specification portion and sets a plurality of search points on the base ellipse, a number of the search points and a distance between the search points being proportional to a perimeter length of the base ellipse;
a composing point calculation portion that calculates composing points forming an object region of the object, based on an image region that is based on the plurality of search points that are set by the base ellipse calculation portion;
a size calculation portion that calculates a size of the object based on the composing points; and
an image processing portion that performs binarization processing to binarize the image;
wherein the composing point calculation portion performs a differential filter processing for extracting an edge of the object region based on the image after the binarization processing, calculates an approximation line that approximates to the edge, and calculates the composing points on the edge based on the approximation line, wherein the differential filter processing uses a primary differential filter, a secondary differential filter, and a noise reduction filter.
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Accused Products
Abstract
An endoscope apparatus including: an image pickup portion that picks up an image of an object; and a measurement portion that measures the object based on the image of the object obtained by the image pickup portion, in which the measurement portion includes: a specification portion that specifies three base points on the image; a composing point calculation portion that calculates composing points forming an object region of the object, based on an image region that is based on a plurality of points, the points set on a line determined by the three base points that are specified by the specification portion; and a size calculation portion that calculates a size of the object based on the composing points.
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Citations
14 Claims
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1. An endoscope apparatus comprising:
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an image pickup device that picks up an image of an object; and a controller configured to function as a measurement portion that measures the object based on the image of the object obtained by the image pickup device; wherein the measurement portion comprises; a specification portion that specifies three base points on the image; a base ellipse calculation portion that calculates a base ellipse based on the three base points specified by the specification portion and sets a plurality of search points on the base ellipse, a number of the search points and a distance between the search points being proportional to a perimeter length of the base ellipse; a composing point calculation portion that calculates composing points forming an object region of the object, based on an image region that is based on the plurality of search points that are set by the base ellipse calculation portion; a size calculation portion that calculates a size of the object based on the composing points; and an image processing portion that performs binarization processing to binarize the image; wherein the composing point calculation portion performs a differential filter processing for extracting an edge of the object region based on the image after the binarization processing, calculates an approximation line that approximates to the edge, and calculates the composing points on the edge based on the approximation line, wherein the differential filter processing uses a primary differential filter, a secondary differential filter, and a noise reduction filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of measuring an object, the method comprising:
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obtaining an image of an object picked up by an image pickup device provided in an endoscope apparatus; and measuring the object based on the image, wherein the measuring comprises; specifying three base points on the image; calculating a base ellipse based on the three base points specified in the specifying; setting a plurality of search points on the base ellipse, a number of the search points and a distance between the search points being proportional to a perimeter length of the base ellipse; calculating composing points that form an object region of the object, based on an image region that is based on the plurality of search points that are set on the base ellipse; and calculating a size of the object based on the composing points; and binarizing the image; wherein calculating the composing points comprises performing a differential filter processing for extracting an edge of the object region based on the image after the binarization, calculating an approximation line that approximates to the edge, and calculating the composing points on the edge based on the approximation line, wherein the differential filter processing uses a primary differential filter, a secondary differential filter, and a noise reduction filter.
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Specification