Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1994-05-31
1998-11-17
Lao, Lun-Yi
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345509, 382269, G09G 528
Patent
active
058382984
ABSTRACT:
An image processing apparatus for smoothly drawing and outputting a contour line of a graphic image includes: an input device to input an image; a memory to store the image input by the input device; a detecting circuit to detect a stairway-like change portion in the contour line image of the image stored in the memory a contour line correcting circuit to perform the smoothing process by forming notches in the stairway-like change portions of the contour line image detected by the detecting circuit; and a display device to display the image. The contour line correcting circuit inverts the stairway-like change portions of the contour line image detected by the detecting circuit, thereby forming the notches and executing the smoothing process. The detecting circuit detects the stairway-like change portions of the contour line image having slopes of a predetermined angle or more with respect to the horizontal or vertical direction in the image stored in the memory. With this apparatus, the visually smooth image is derived without performing a complicated control operation.
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Canon Kabushiki Kaisha
Lao Lun-Yi
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