Color Image Zooming

Abstract

DefinitionImage zooming or spatial interpolation of a digital image is the process of increasing the number of pixels representing the natural scene.Image zooming is frequently used in high resolution display devices [1] and consumer-grade digital cameras [2,3]. Unlike spectral interpolation, spatial interpolation preserves the spectral representation of the input. Operating on the spatial domain of a digital image, spatial interpolation transforms a gray-scale or color image into an enlarged gray-scale or color image (Fig. 1), respectively.Color Image Zooming. Figure 1.Demonstration of a color image zooming concept.In the single-sensor imaging pipeline [3], color image zooming operates on the recorded demosaicked image. Such a pipeline typically employs a demosaicking scheme at the first processing stage to produce a full color image. The spatial resolution of the demosaicked image is then increased using a color image zooming technique operating on the RGB color vectors (Fi ...