This paper presents a system that helps users by suggesting appropriate colors for inserting text and symbols into an image. The color distribution in the image regions surrounding the annotation area determines the colors that make a good choice – i.e. capture a viewer’s attention, while remaining legible. Each point in the color-space is assigned a distance-map value, where colors with higher...

One example of color constancy is color transparency: when a surface is seen both in plain view and through a transparent overlay, the visual system still identifies it as a single surface. Previous studies suggest that color changes across a region of an image that can be described as translations and/or convergences in a linear trichromatic color space lead to the perception of transparency, ...

An efficient technique is presented for obtaining dense stereo correspondence using a new adaptive Block Matching technique. First, one of the color stereo images (e.g., the left) is segmented into chromatic and achromatic regions using perceptual attributes in the HSI color space. Then the Block Matching technique is applied to the stereo images using adaptive similarity measures. The results ...

The correction of the effects of color-weakness is difficult if not impossible. One of the reasons is that are no objective criterions available to evaluate corrections since it is difficult to quantify the color perception of an individual. Also the degree and the character of color-weakness vary widely among individuals and different color stimuli. In this paper, we use Riemann geometry to co...

This paper presents the comparative study among HSV and YCbCr color models in the classification of food grains by combining color and texture features without performing preprocessing. Also, the paper deals with the effect of training set, block size and K-value in the process of classification. The proposed method is performed in two phases; the feature extraction phase and classification pha...

Techniques from the theory of partial differential equations are often used to design filter methods that are locally adapted to the image structure. These techniques are usually used in the investigation of gray-value images. The extension to color images is non-trivial, where the choice of an appropriate color space is crucial. The RGB color space is often used although it is known that the s...

This paper presents a surveillance system that detects and recognizes people in indoor scenes. To distinguish between different people, color histograms on a perceptually uniform color space are used. The goal here is to associate a sequence showing a person leaving a room with the previously recorded sequence showing that same person entering.

We have analyzed the properties of the HSV (Hue, Saturation and Value) color space with emphasis on the visual perception of the variation in Hue, Saturation and Intensity values of an image pixel. We extract pixel features by either choosing the Hue or the Intensity as the dominant property based on the Saturation value of a pixel. The feature extraction method has been applied for both image ...