Abstract
Thumbnail image with blurry edge information has attracted much attention in recent years. Thumbnail image, which is a tiny version of the original image, enables user to scan through a large proportion of image data for elimination of blurry image or picking up a sharp and a nice image in user’s perspective. The thumbnail image is being utilized commonly in camera, smart phone, and other computing devices. In this paper, a method to embed blurry edge information in thumbnail images is proposed. This method is straight forward and simple to be implemented in electronic products. The image will undergo edge width measurement process by finding the local maximum and local minimum locations based on its edge magnitude. This is obtained after the implementation of horizontal and vertical first order derivatives of the original high resolution input image. The blur edges will be emphasized by utilizing edge width information during downsampling process to enable users to identify blurry edge image distinctively. Experimental results show a satisfactory outcome in embedding blurry characteristics of the original image to thumbnail image on the proposed method.
Highlights
Photo capturing by digital camera is very convenient for most consumers, be it the process of photo taking or viewing the photo after the image is captured [1]
While the camera manufacturers continue to improve photo quality and increase the resolution of the image captured by their products, the consumers are drowning in digital visual contents [3]
In order to evaluate the performance of thumbnail with blur information (TBI), thumbnail images from TBI are compared with the outputs from pixel-based downsampling with antialiasing filter (PDAF), Direct pixel-based downsampling (DPD), and direct subpixel-based downsampling (DSD) methods
Summary
Photo capturing by digital camera is very convenient for most consumers, be it the process of photo taking or viewing the photo after the image is captured [1]. Mathematical Problems in Engineering filter to bandlimit the frequency components of the original image, so that aliasing problem after signal resampling process can be avoided This method is not able to retain noise information very well. Direct pixel-based downsampling (DPD) is a method of generating thumbnail image without the need of any filtering. The DPD thumbnail image is sharper than PDAF thumbnail image because it contains higher frequency components [8] Another thumbnail image method is direct subpixel-based downsampling (DSD). Thumbnail with blur information (TBI) is proposed in this paper The purpose of this new algorithm is to assist the user to perceptually identify an image of good quality based on the thumbnail image.
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