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the Active Matrix Organic Light Emitting Device (AMOLED) currently apply four sub-pixels architecture, which include a red (R), green (G), blue (B) and additional (X) sub-pixel, which has high luminous efficiency to achieve a power efficient display. Therefore, a specified algorithm would be requested to indicate which pair of sub-pixels is lighting up. In this work, we propose an available method...
This paper presents a Sum of Absolute Difference (SAD) algorithm implementation in FPGA for the purpose of template matching on two binary images, and evaluates its performance. This SAD processor was implemented as a hardware unit that is capable of calculating 40 × 40 pixels at once, called a 40 × 40 SAD unit. The target and template images processed using this unit were both binary image with size...
The paper introduces several variants of hierarchical Gibbs model applied for solving the problem of textured images segmentation. Binary contour preparation and three-valued texture preparation are used to describe textured images. We demonstrate the performance of the developed algorithms with examples of practical processing real textured images.
Texture is considered one of most significant information sources in histo-pathology image analysis. To take advantage of information on color texture in digital histo-pathology, this work analyzes inherent characteristics of the hue component in the cylindrical color space, and introduces an effective color texture descriptor based on the LBP paradigm. Unlike existing LBP variants designed for linear...
Due to the characteristic of the blood flow in capillaries, the color distribution of the Micro-vascular image is uneven and its gray scale continuity is poor. At the same time, Micro-vascular image also has the characteristic that light color, low contrast with background and so on. Therefore we put forward a Micro-vascular image segmentation method based on the improved adaptive region growing....
In this paper we study ways to generalise Otsu's binarization method towards reduction of colour levels in colour images. Colour defines a multi-dimensional property vector at each pixel location, and this can be further generalised towards considering arbitrarily finite-dimensional property vectors at pixel locations. Otsu's binarization method, originally already briefly discussed by Otsu for multi-thresholding,...
With the rapid development of Internet, web information is being more and more colorful. However, mixed color information makes people with low vision see webpage unclearly when they surf the Internet. For people with low vision cannot distinguish so many colors, enhancing the contrast between text or image and background is considered as the most effective way to improve this situation. Based on...
This paper presents a novel gradient correlation similarity (Gcs) measure-based decolorization model for faithfully preserving the appearance of the original color image. Contrary to the conventional data-fidelity term consisting of gradient error-norm-based measures, the newly defined Gcs measure calculates the summation of the gradient correlation between each channel of the color image and the...
Aimed at the problem for low accuracy of athlete number positioning under the complicated background, an algorithm of localization which based on edge detection and color features was presented. First, the edge detection method on the basic of the character features of athlete number was applied to the athlete number image. Then, the binary image processing was carried on by selecting an optimal threshold,...
Colorizing of grayscale images is a frequent and a widely used phenomenon in image processing. The approach presented in the paper is an automated one, consisting of a pair of sequential steps; reference image selection from the database followed by pixel coloring using luminance and neighbourhood statistics matching algorithm. The efficiency of the proposed technique is highlighted by the use of...
Caption texts in news video highly summarize the related news story and can be used for effective retrieval. This paper presents an effective caption location method based on edge detection and an improved caption segmentation method combined with Otsu and K-means clustering algorithm. Experiment results show that the caption location method performs well in the news video and the caption segmentation...
A new license plate localization algorithm is presented. Execution times of these operations can rather be long, especially where the image consists of large amount of either vehicle's linked components or the other existing objects. This algorithm combines the image processing techniques with some statistical methods and eventually a pattern checking method is also added. Here, minimum rectangle...
In this paper, we present a cryptography-based anti-detection data hiding algorithm to frustrate pair-of-value (PoV) steganalysis. With security keys, the algorithm is able tweak the embedding process so that the stego images have smaller statistics difference. The statistics features vital to PoV steganalysis can thus be securely diminished and thus significantly decrease the successful detection...
An efficient colorization scheme for images based on prioritized source propagation is proposed in this work. A user first scribbles colors on a set of source pixels in an image. The proposed algorithm then propagates those colors to the other non-source pixels. Specifically, the proposed algorithm identifies the non-source pixel with the highest priority, which can be most reliably colorized. Then,...
Electro-Optic (EO) image sensors exhibit the properties of high resolution and low noise level, but they cannot reflect information about the temperature of objects and do not work in dark environments. On the other hand, infrared (IR) image sensors exhibit the properties of low resolution and high noise level, but IR images can reflect information about the temperature of objects all the time. Therefore,...
In order to overcome the limit of traditional methods in image cast detection, a new cast detection approach with robust performance is presented. The algorithm by using digital image analysis is used to analyze the characteristics of the image itself. Especially the algorithm introduces image texture information to cast factor K. The new technique of evaluating cast detection not only is able to...
Detection of a leaf from the image that contains the leaf, branches, and other background material is challenging. The existing approaches for automated leaf extraction do not provide satisfactory results when the end-users provide a plant image. For such an application to be feasible, the automated leaf extraction algorithm should handle leaves of various colors, shapes, sizes, and locations within...
The traditional Welsh's grayscale image colorization method for color transferring is based on pixel's luminance information only. The method generally cannot ensure the continuity of image transferring effect in space. This paper presents a color transfer algorithm based on neighborhood correlation and optimization techniques, which not only considers neighborhood's luminance information but also...
The performance of full-color LED display is related with refresh rate, This paper presents a advanced scan mode based on dispersed PWM, and illustrates the algorithm to disassemble a PWM pulse into many regular narrow pulses. This scan mode can provide very high dynamic refresh rate rather than fixed frequency, eliminate flicker effect even as low frame frequency and expand gray-scale depth .This...
Color constancy (CC) or white balance (WB) is an important image processing step in digital camera and machine vision. This paper presents a robust computational algorithm that offers an accurate solution for CC. The proposed CC measure exploits the scanning strategy of RGB channel gain adjustment. In addition, the suppressing mechanism of grayscale pixel maximization (GPM) is used to locate potential...
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