| 摘要 |
PURPOSE:To make it possible to eliminate the edge emphasis in an unnecessary direction by a simple circuitry by determining the presence or absence of the edge emphasis and the direction based on a binary pattern. CONSTITUTION:Image data to be inputted in a memory 1 regards the output value from a CCD as plural bits serial image data after a digital conversion is performed. In an edge direction selection part 20, the presence or absence and the direction of an edge emphasis is detected by the pattern matching after a binary processing is performed. In a four direction Laplacian calculation part 9, the Laplacian of the total four directions of a horizontal direction, a vertical direction, two oblique directions is calculated. Next, in four-direction one direction Laplacian selection part 10, the Laplacian in the edge direction selected in an edge direction selection part 20 is selected from the output of the four-direction Laplacian calculation part 9 and is outputted as edge emphasis amount to an edge emphasis amount calculation part 11. In this edge emphasis amount calculation part 11, the inputted edge amount is added to the value of the image data of a picture element under consideration and the image data is outputted from a Pout. |
