Common techniques of lens design lead to image quality assessment in the plane of the miniature display of a headmounted display (HMD) instead of image quality in visual space as expected from a usability point of view. In this paper, we present an analysis of HMD performance in visual space including MTF, accommodation, astigmatism, and transverse color smear.

A digital color image quality metric is proposed in this work based on the characteristics of the human visual system (HVS). Chromatic coordinates are transformed from spectral cone absorption responses to the opponent-color space. The sensitivity thresholds in each of the color space axes are measured and visual masking models are provided and parameterized. Multiple contrasts are computed by ...

A blockwise distortion measure is proposed for evaluating the visual quality of compressed images. The proposed measure calculates quantitatively how well important visual properties have been preserved in the distorted image. The method consists of three quality factors detecting contrast errors, structural errors, and quantization errors. The proposed method outperforms PQS for a set of test ...

Image quality assessment (IQA) is a complex problem due to subjective nature of human visual perception. Human have always seen the world in color. The widely objective metrics used are mean squared error (MSE), peak signal to noise ratio (PSNR), and human visual system based on structural similarity and edge based similarity. The problem of these objective metrics that they evaluate the qualit...

Color Constancy is the capability to recognize colors of objects, invariant to the color of the illumination source. This ability is usually endorsed to the Human Visual System, even though the precise details remain hesitant. Visual surveillance is one of the applications of color constancy which aims to improve the reliability of applications that depend on consistent color descriptions. Also...

In this paper, we propose a post-processing technique developed for the improvement of color contrast in DCTcoded color images. The high frequency components caused by complex object parts are examined on DCT tables, and the correlations between luminance coefficient and Chrominance one in DCT domain are analyzed. By considering the information of relation, we modify Cb, Cr coefficients using w...

Color image quality depends on many factors, such as the initial capture system and its color image processing, compression, transmission, the output device, media and associated viewing conditions. In this paper, we are primarily concerned with color image quality in relation to compression and transmission. We review the typical visual artifacts that occur due to high compression ratios and/o...

3D video games use texture maps to improve the realism and the visual detail of graphical objects without significantly increasing rendering complexity. The general trend in the gaming industry towards the use of large texture maps has lead to the use of texture compression techniques. Current color texture compression techniques treat all texture content uniformly which can lead to reduced vis...

The new image compression standard, JPEG2000, provides higher compression rates for the same visual quality for grayscale and color images than JPEG. JPEG2000 is being adopted for image compression and transmission, e.g. in mobile phones, PDAs, and wearable computers. Depending on the application, images may contain formatted text and graphics data. For graphics images at the same low bit rates...

An image attention model and its application to image quality assessment are discussed in this paper. The attention model is based on rarity quantification, which is related to self-information to attract the attention in an image. It is relatively simpler than the others but results in taking more consideration of global contrasts between a pixel and the whole image. The visual attention model...