| 摘要 |
PURPOSE:To improve the resolution in position measurement with an ordinary television camera by reading the information of the brightness of the image stored in a variable density image memory, and adding the ratio of the differ ence of the brightnesses obtained in the changing range of the brightnesses between the images, which are picked up with a television camera, to the lower coordinate values. CONSTITUTION:A variable-density image memory 18 receives and stores the image signal of a digitized object, which is picked up with a television camera 11, from a data signal line through a buffer 12, an A/D converter 13 and a switch 21. A computer 19 is connected to a counter 17 through a switch 20 from an address signal line and connected through the switch 21 from the data bus signal line. The switches 20 and 21 are switched only when the computer 19 accesses the memory 18, and the brightness information of the picked up image is read out. The difference of the brightnesses of the images on both sides holding the average brightness between the pixels is made to be the denominator, the difference between the brightness of the lower pixel of the coordinate value and the average value is made to be the numerator and division is performed. The result is added to the lower corrdinate value. |
