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The visual quality evaluation is one of the fundamental challenging problems in image processing. It plays a central role in the shaping, implementation, optimization, and testing of many methods. The existing image quality assessment methods ...

Color image quantization, a form of lossy image compression, is the process of reducing the number of unique colors in an image without appreciable reduction in quality. Originally color quantization was developed for satisfying hardware constraints of ...

Colorization of grayscale image is a process to convert a grayscale image into a color one. Few research works reported in literature on this but there is hardly any generalized method that successfully colorizes all types of grayscale image. This study ...

Although last improvements in both physical storage technologies and image handling techniques have eased image managing processes, the large amount of information handled nowadays constantly demands more efficient ways to store and transmit image data ...

Color quantization is the process of reducing the number of colors in a digital image. The main objective of quantization process is that significant information should be preserved while reducing the color of an image. In other words, quantization ...

Mammography is at present one of the available method for early detection of masses or abnormalities which is related to breast cancer. The most common said abnormalities that may indicate breast cancer are masses and calcifications. The challenge is to ...

The proximal isovelocity surface area measurement, also called as the "flow convergence" method, can be used in echocardiography to estimate the area of an orifice through which blood flows. It has a lot of applications, but this paper focuses only on ...

In this paper, we present a mobile healthcare application that applies color quantization technique in analysis of color images taken by a camera phone to automate pH classification of medical tests. Experimental results and comparative study have ...

In this paper, we present a numerical technique for simplification of the texture of 3D maps. In the simplification process, we first select textures that can be segmented by straight lines using Hough transform. The selected texture images are ...

In this paper, we propose a new Gray-Color initialization method for use with the Kohonen's self-organizing feature maps in color image quantization. In our method, the neurons in the competitive layer are initialized in two distinct groups and the ...