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Webpage interface design is one of the most important fields in Human Computer Interface (HCI) design. Based on the HCI interactive design theory and basic process of human-computer interaction on website, this paper proposed that Webpage HCI design includes two levels: sense level and psychology level. To satisfy the two level needs, It deeply discusses webpage interface design principles. The paper...
To avoid color distortion and meanwhile exert display advantage of wide gamut displays, there needs gamut expansion mapping from the current standard gamut to the gamut of these devices. A gamut expansion method based on saturation enhancement in CIE-xy chromaticity diagram is proposed. The algorithm first divides the gamut triangle into two parts, the achromatic region and the normal color region...
This article proposed a new algorithm to handle color image seqsuences. This new algorithm allows the processing sequence of three consecutive frames on the same principle as for fixed images. The goal is to enhance the reconstruction video frequency, even if transmits presents the wrong visual quality, and makes the transmission process to be as far as possible simple. This new algorithm is based...
A color image quality assessment (C-IQA) method was proposed based on the primary and fundamental image quality parameters perceived by human vision system. The methods for measuring these parameters were given. A comprehensive image quality assessment model, called as the best quality assessment function for the color image, was established through trials by means of these parameters. The maximum...
Considering the limitations of traditional centre / surround Retinex algorithm, an improved Retinex algorithm is proposed in this paper. The improved algorithm uses bilateral filtering on the each pixel and its neighborhood instead of employing traditional Gaussian filter, which makes the estimated background luminance maintain a good discontinuity in light mutation. Therefore, the proposed approach...
This paper presents a three-step framework to remove the highlight exists on objects in certain conditions. Unlike traditional HDR (High Dynamic Range) technology requires multiple registrated image sequence; our method needs only two arbitrary images. SURF (Speeded Up Robust Features) matching algorithm is first applied to find corresponding point pairs between images; homography is then found by...
Edges in images are considered to be basic low-level features in image processing and pattern recognition. In this paper, we propose a new method for edge detection using the exponential function. The pixel values within a mask are normalized so that they can be regarded as probabilities. Then, the sum of the exponential or the reciprocal of exponential functions of the probabilities is calculated...
Since the shortage of spectrum resources, paper raises a improvement based on the user waiting time and bandwidth requirement of CSGC algorithm via the analysis of graph coloring model. The new algorithm takes into account both user waiting time and actual bandwidth requirements, so that minimize the total unsatisfied needs and users tend to equal access to spectrum resources. It ensures the fairness...
A new method to embed the watermarks in the amplitude of the quaternion is proposed this paper. Firstly, ununiformity of each unit quaternion block in host image is calculated to pick up the potential block adaptively. Secondly, frequency matrix of host color image is obtained by using quaternion Fourier transform. After that, the water marks are embedded into the amplitude of AC coefficient. Experimental...
A color image compression algorithm based on quaternion neural network approach is proposed. The original RGB based color image of Lena can be firstly modeled as pure imaginary quaternion matrix, i.e. any pixel of R,G,B corresponding to the I,J,K imaginary axis , to ensure the integrity of pixel in the computation. The obtained quaternion matrix can be split up into 8 × 8 sub-blocks and vector quantization...
At presents, the technique of multi-feature combination of trademark image retrieval is an increasingly popular branch of CBIR. In this paper, it's proposed that multi-feature combination based on color and shape is applied to trademark image retrieval. Firstly, RGB color space is converted to HSV color space, which complied with human visual perception better. Then color moments, which can describe...
Diffusion and superposition are the most important and complicated artistic effects in computer simulation of Chinese ink-wash drawing. This paper proposes a physical-based simulation method, which is grounded on the diffusion-effect model. First we establish particle movement equations to calculate the diffusion amount of water-ink particles according to Brownian motion and Capillary effect. In the...
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