Progressive image transmission

Details Progressive image transmission Progressive image transmission

1997-09-16

2000-09-26

Kelley, Christopher S.

Image analysis

Image compression or coding

Polygonal approximation

382245, 382251, 3582611, G06K 936

Patent

active

061252115

ABSTRACT:
Image to be transmitted is divided into blocks. The block size varies in each stage of transmission. The blocks are down-sampled to a fixed size for polynomial approximation coding (PAC). The PAC's are derived from a regressive model which is a statistical tool for data analysis. A two-dimensional polynomial equation is used to approximate the relation of the image data and their positions. The coefficients of the 2-D polynomial equation is coded and transmitted to represent the initial image. In the next stage, same or similar coding is conducted to the residual image. After a decided number of stages of transmission an approximated image is reconstructed. A novel iterative coding system for progressive image transmission is disclosed.

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