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Singular Value Decomposition (SVD) deals with the decomposition of general matrices which has proven to be useful for numerous applications in science and engineering disciplines. In this paper the method of SVD has been applied to mid-level digital image processing. SVD transforms a given matrix into three different matrices, which in other words, means refactoring the digital image into three matrices...
This paper presents a new grassy effect generation approach. The grassy effect changes original image as the one behind the grass. A random number generation function is employed to decide the same of block and location of the pixel. Obtained various block size and pixel location yield unexpected grassy execution to the original image. The subjective and the objective image performances are compared...
Colorization is a technique to produce color components for grayscale images with color assigned information provided by the user. The conventional method colorizes via propagating the assignations with weights of neighborhood pixels. In this paper, we propose the colorization method based on the piecewise auto-regressive (AR) model. The proposed method calculates weights considering taking account...
In this paper we describe ongoing work in an advanced disparity algorithm developed for interactive systems. First we have developed an adaptive interpolation algorithm based on a bilinear interpolation for image resizing; and second we have integrated this algorithm to create a multi-screen view suitable for the interactive television. We propose a new hardware architecture that enables implementation...
We propose a novel 3D space representation for multi-view video, using epipolar plane depth images (EPDI). Multi-view video plus depth (MVD) is used as common data format for FTV(Free-viewpoint TV), which enables synthesizing virtual view images. Due to large amount of data and complexity of the multi-view video coding (MVC), compression of MVD is a challenging issue. We address this problem and propose...
Two dimensional (2D) barcodes are becoming a pervasive interface for mobile devices, such as camera phones. Often, only monochrome 2D-barcodes are used due to their robustness in an uncontrolled operating environment of camera phones. Most camera phones capture and store such 2D-barcode images in the baseline JPEG format. As a lossy compression technique, JPEG does introduce a fair amount of error...
Single-sensor digital cameras capture images by covering the sensor surface with a color filter array (CFA) such that only one color sample is taken at the location of each pixel. To render a full-color image, color CFA interpolation or demosaicing using neighboring samples as a very important part of video/image processing, is required to estimate values of the other colors at each pixel. However,...
This work concentrates on the problem of color image watermarking based on support vector regression (SVR). The original color image was partitioned into contiguous 3x3 blocks. Each block was converted from the RGB color space to the YCbCr color space and the watermark information was embedded in the luminance channel of YCbCr color space. Some blocks with small variance in luminance channel were...
A method for improving the watermark extraction performance of the digital watermarking based on the modification of image pixels is proposed in this paper. By embedding the watermark in the chrominance channel and using the Weiner filter with 3times3 window size in the watermark extraction process, the accuracy of the extracted watermark can be improved. Sets of experiment are carried out to prove...
Full reference image quality indices assign a quality index to a pair of an undistorted reference image and a distorted image to be assessed; the quality of the index itself is then defined by its ability to predict the outcome of subjective tests performed by human observers judging the quality of the same image pair. In this article, a new DCT based image quality index is introduced whose complexity...
In this paper, we proposed a scaling algorithm based on inverse square law for bilinear interpolation. In order to use inverse square law, we modify bilinear interpolation. The image quality was compared with those of the conventional image scaling algorithms with Matlab. From the result, proposed algorithm has good quality and high sharpness. Our proposed algorithm uses 12 pixels of original image...
Automatic white balance and color filter array interpolation are two important function of image signal processor for CMOS image sensor. This paper describes the designs and implementations of new automatic white balance method and color interpolation method on FPGA. This white balance method can effectively get the better of the defects of gray world and gray world-retinex methods by calculating...
A new demosaicking algorithm based on direction categorization for wireless IP camera is proposed. By calculating the differences of neighboring pixels and the difference of average value of horizontal and vertical green pixels, the centered pixel is classified as horizontals verticals smooth and non-direction. After the directionality of the centered pixel is determined, the gradients of adjacent...
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