Endoscope apparatus

Abstract

An endoscope apparatus includes: a video signal acquisition portion that images an object to acquire a video signal by a stereo optical system; a video signal processing portion that processes the video signal to generate a display video signal; a measurement processing portion that performs measurement on the basis of the video signal; and a display portion that displays the display video signal. The video signal processing portion generates the display video signal by extracting one image from the video signal including a plurality of images from the stereo optical system, and the display portion displays the display video signal including the one image extracted by the video signal processing portion during a period regarding measurement. The measurement processing portion calculates a matching degree between the plurality of images at a position corresponding to the measuring position. The display portion displays the matching degree together with the display video signal.

What is claimed is: 
     
         1 . An endoscope apparatus comprising:
 a video signal acquisition portion configured to image a test subject by a stereo optical system to acquire a video signal, the video signal including a first image and a second image that are simultaneously acquired through the stereo optical system;   a video signal processing portion configured to process the video signal to generate a display video signal;   a measurement processing portion configured to acquire information on a position of a corresponding point on the first image and the second image corresponding to an input measurement point by a matching processing and calculate three-dimensional information of the input measurement point based on the acquired information on the position of the corresponding point; and   a display portion configured to display the display video signal, wherein:
 the video signal processing portion is configured to generate a second display video signal by performing a process for dividing the first image and the second image of the video signal acquired by the video signal acquisition portion and generate a first display video signal by performing enlarging processing for one image of the first and second images divided at a time at which the second display video signal is generated; 
 the endoscope apparatus is configured such that when an operation input for starting measurement processing by the measurement processing portion has been performed in an image display mode, the image display mode is changed into a measurement mode; and 
 the display portion is configured to display the first display video signal as an image used to input the measurement point in the measurement mode. 
   
     
     
         2 . The endoscope apparatus according to  claim 1 , wherein the video signal processing portion is configured to process the video signal such that the entire one image is enlarged. 
     
     
         3 . The endoscope apparatus according to  claim 1 , wherein the video signal processing portion is configured to process the video signal such that a predetermined region of the one image is enlarged. 
     
     
         4 . The endoscope apparatus according to  claim 1 , further comprising:
 a measuring position input portion configured to input a measuring position designated on an image of the first display video signal.   
     
     
         5 . The endoscope apparatus according to  claim 4 , wherein the measurement processing portion is configured to perform measurement on the basis of the video signal including the first and second images acquired by the video signal acquisition portion. 
     
     
         6 . The endoscope apparatus according to  claim 1 , further comprising:
 a control portion configured to perform a control of storing the video signal including the first and second images acquired by the video signal acquisition portion in a storage medium.   
     
     
         7 . The endoscope apparatus according to  claim 6 , wherein:
 the control portion is configured to read the video signal stored in the storage medium and make the video signal processing portion generate from the read video signal the first display video signal including the one image,   the display portion is configured to display the first display video signal, and   the measurement processing portion is configured to perform measurement on the basis of the video signal stored in the storage medium.   
     
     
         8 . The endoscope apparatus according to  claim 4 , wherein:
 the measurement processing portion is configured to calculate a degree of matching between positions of corresponding points on the first image and the second image corresponding to the measurement point acquired by the matching processing as a reliability of the matching processing; and   the display portion is configured to display the reliability of the matching processing together with the display video signal.   
     
     
         9 . The endoscope apparatus according to  claim 8 , wherein the video signal processing portion is configured to output, as the display video signal, the video signal including the first and second images acquired by the video signal acquisition portion when matching precision indicated by the reliability of the matching processing is at most a predetermined value. 
     
     
         10 . The endoscope apparatus according to  claim 8 , wherein the measuring position input portion is configured to input a measuring position again when matching precision indicated by the reliability of the matching processing is at most a predetermined value. 
     
     
         11 . The endoscope apparatus according to  claim 1 , wherein the display portion is configured to display the first display video signal in the image display mode. 
     
     
         12 . The endoscope apparatus according to  claim 1 , wherein the display portion is configured to display the second display video signal in the image display mode. 
     
     
         13 . The endoscope apparatus according to  claim 1 , further comprising:
 an image storing portion configured to store the second video signal that is output from the video signal processing portion while displaying the first display video signal on the display portion.