Showing papers on "Top-hat transform published in 1976"
TL;DR: In this article, a distorted image is restored by multiplying its Fourier transform by a succession of random phases having statistics that mirror those of the distorting process, and then the most intense part is normalized to unity and shifted to the origin of image space.
15 citations
13 Dec 1976
TL;DR: Way in which the image pixels can be permuted before the image is blocked and a special annihilation transform technique to perform the image coding is discussed.
Abstract: In the usual transform compression encoding schemes, an image is divided into regular shaped subimages or blocks, a transform is performed on each block, low energy components thrown away, remaining components encoded and transmitted, and then the received image reconstructed. This paper discusses ways in which the image pixels can be permuted before the image is blocked and a special annihilation transform technique to perform the image coding. Experimental results show the compressed images to have no blocking effects, but a more mottled appearance compared to a discrete cosine transform coding method. The annihilation method on permuted images not only gives reconstructed images better visual quality, but also gives lower RMS error.© (1976) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
1 citations