| 摘要 |
PURPOSE:To precisely inspect the quality state of a color-changing surface by quantizing a video signal to conduct differential processing in the color changing direction, and integrating the result vertically to the color changing direction to determine the inclination of a straight line from a viewpoint. CONSTITUTION:A film 10 is exposed to an illumination 11, and the transmitted light is picked up by a television camera 12 and quantized by an A/D converter 21 to form a digital image, which is then inputted to an image memory 22. On the basis of this image, the quality of a color transitional part on the surface is judged by a CPU 23 and transmitted from an output part 30 to the outside. To the image data, a spatial differential value in N-direction (color transitional direction) is determined, each signal in N-direction is integrated in M-direction, and the average density in M-direction is determined with a specified expression to form an one-dimensional signal. The inclination of a straight line extending from a viewpoint to an adjacent point as the terminal point is determined, and the terminal point is successively shifted while the viewpoint is fixed to provide a series of a preliminarily designated number of points. This series is used as the input signal to a neural network to judge its rank. |
