Image analysis – Histogram processing – For setting a threshold
Patent
1989-11-28
1990-12-04
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
340727, 364731, 382 57, G06K 932
Patent
active
049759779
ABSTRACT:
In an image data rotating system for applying rotation processing to input image data of a large picture plane, the image data is divided into rectangular small blocks and rotation processing is applied to the image data of each block. The rotation processing to the image data of each block is performed by first reducing in the x-axis direction and enlarging in the y-axis direction. Then the first oblique axis transformation is applied. Any error data between the real oblique axis and the image element found in the final raster of the corresponding region is held in a memory. Subsequently, the second oblique axis transformation in the y-axis direction is applied, and error data is held in similar manner. Error data held as the initial value for the rotation processing to the image data of the adjacent region block is used, thereby allowing the rotation of the image data of a large picture plane to an arbitrary angle to be executed at high speed.
REFERENCES:
patent: 4618991 (1986-10-01), Tabata et al.
patent: 4637057 (1987-01-01), Kermisch
patent: 4759076 (1988-07-01), Tanaka et al.
patent: 4829452 (1989-05-01), Kang et al.
Kurosu Yasuo
Masuzaki Hidefumi
Boudreau Leo H.
Hitachi , Ltd.
LandOfFree
Rotation processing method of image and system therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotation processing method of image and system therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotation processing method of image and system therefor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-888932