Image coder-decoder using a matrix transform with weighted contr

Details Image coder-decoder using a matrix transform with weighted contr Image coder-decoder using a matrix transform with weighted contr

1976-09-30

1977-10-25

Malzahn, David H.

Boots, shoes, and leggings

364727, G06F 1534

Patent

active

040557561

ABSTRACT:
A matrix transform system for coding and decoding images. The system comprises means for sampling the lines and the columns of an image and forming with these samples a sample square matrix and storing the same. This sample square matrix is split into component square matrices of order 3N .times. 3N having a central part of order N .times. N. Each of these component matrices is multiplied by a first rectangular coefficient matrix of order N .times. 3N having a square central part in which the coefficients are equal to unity and two square lateral parts in which the coefficients are selectively equal to zero and a predetermined factor smaller than unity, which gives an intermediate matrix of order N .times. 3N. This intermediate matrix is multiplied by a second rectangular coefficient matrix of order 3N .times. N which is the transpose of the first rectangular coefficient matrix, which gives an output matrix of order N .times. N which is the transform of the central part of the component matrix. If N = 2, the output matrix is of order 2 .times. 2; one of its terms depends on four samples of the image, two of its terms depend on 12 samples of the image and the last of its terms depends on 36 samples of the image.

REFERENCES:
patent: 3952186 (1976-04-01), Speiser et al.
patent: 3981443 (1976-09-01), Lynch et al.
W. K. Pratt et al., "Hadamard Transform Image Coding", Proceeding of the IEEE, vol. 57, No. 1. Jan. 1969, pp. 58-68.
K. R. Rao et al., "Image Data Processing by Hadamard - Haar Transform", IEEE Trans. on Computers, vol. C-24, No. 9, Sept. 1975, pp. 888-896.

Affiliated with

Also associated with

Rating

Image coder-decoder using a matrix transform with weighted contr 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 coder-decoder using a matrix transform with weighted contr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image coder-decoder using a matrix transform with weighted contr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-124445