Image analysis – Image compression or coding – Transform coding
Patent
1995-09-05
1998-06-30
Boudreau, Leo
Image analysis
Image compression or coding
Transform coding
382268, 348403, 358433, G06K 936, G06K 946
Patent
active
057745978
ABSTRACT:
An image processing apparatus and method that completely removes blocking artifacts from a compressed and restored digitized image. A compressed image is formed by windowing pixel data with a smooth window (discrete cosine transform) and then folding (wrapping) the windowed pixel data to form a modified image that is the same size as the original image. The wrapped and folded image is thereafter processed using a conventional discrete cosine transform and coder to produce the compressed image. To restore the original image, an inverse discrete cosine transform is used to process the compressed image, then the pixel data is unfolded (unwrapped), windowed, and combined to form the restored image. The present invention may be used to process data, such as voice signals, and images other than radiological images. The transform used in the present invention may also be a Fourier transform, for example.
REFERENCES:
patent: 4754492 (1988-06-01), Malvar
patent: 5455874 (1995-10-01), Ormsby et al.
patent: 5495538 (1996-02-01), Fan
patent: 5510841 (1996-04-01), Iwamura
Boudreau Leo
Float Kenneth W.
GE Medical Systems, Inc.
Mehta Bhavesh
LandOfFree
Image compression and decompression using overlapped cosine tran does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image compression and decompression using overlapped cosine tran, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image compression and decompression using overlapped cosine tran will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1868882