In the compression of color or multispectral imagery, intra pixel color transforms are usually employed to decorrelate planes. It is usually thought that plane decorrelation (such as provided by the KLT) may lead to higher compression. Spatial correlation, however, is usually not considered. We developed a method to devise a pixel-wise color transform that takes into acount spatial correlation ...

Nowadays, almost all images acquired are in color format. Traditional methods process color images by either transforming them into gray scale or dividing them into red, green, and blue components for independent processing, which is definitely not effective in representing color information. Recently, a novel Polar Linear Canonical Transform (PLCT) with parameters in SL(2,<) has been reported,...

The theory behind compression systems is well established, and it is a common assumption that image compression systems such as DCT (Discrete Cosine Transform) perform better in a decorrelated space than with the highly correlated RGB (Red, Green, Blue) components. YUV is therefore the main choice for compression systems instead of the original RGB domain. As a result, several questions arise: ...

We define a color monogenic wavelet transform. This is based on the recent grayscale monogenic wavelet transform and an extension to color signals aimed at defining non-marginal tools. Wavelet based color image processing schemes have mostly been made by using a grayscale tool separately on color channels. This may have some unexpected effect on colors because those marginal schemes are not nec...

A Gabor filtering method for texture based classification of color images is presented. The algorithm is robust and can be used with different color representations. It involves a filter selection process based on texture smoothness. Unichannel and interchannel correlation features are computed. Two types of color representations have been considered: (1) computing chromaticity values from xyY,...

Color sensors in scanners and color copiers are not colorimetric | RGB values are not a linear transformation away from device{independent XYZ tristimu-lus values. For a given set of targets or dyes one can readily nd a best linear transform or use interpolation. However, when the possible targets are unknown, a data-independent transform is needed. Here, we set out a very simple linear transfo...

We propose a new lossless progressive color coding of color still images. An image is rstly transformed by reversibleWavelet transform such as S transform due to progressive transmission of image. And we utilize for an improvement of the compression performance not only the inter color correlation but also the inter/intra band correlation of the subbands of reversible wavelet transform. We show...

In this paper we propose a method for automating the process of detecting regions of motion in a video sequence in real time. The main idea of this work is to detect motion based on both structure and color. The detection using structure is carried out with the aid of information gathered from the Census Transform computed on gradient images based on Sobel operators. The Census Transform charac...

162 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Pvt. Ltd. Abstract— The objective of the image enhancement is to remove the noise. Real color images are images with noise. In traditional image enhancement algorithms color images are firstly converted to gray images. These algorithms enhanced noise while they enhanced image. In this paper wavelet transform is used for...

This paper presents a semi-fragile blind watermarking scheme for color images based on Visual Cryptography (VC) and Discrete Cosine Transform (DCT). Firstly, the binary watermark image is separated into two shares, i.e., the public share and the private share, by using the VC technique. Then, the color host image is converted from the RGB color space into the HSV color space. Next, the DCT tran...