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Journal of Information Science and Engineering, Vol. 34 No. 1, pp. 51-64

Hardware Implementation of an Image Interpolation Method with Controllable Sharpness

Department of Computer Science and Information Engineering
National Cheng Kung University  
Tainan, 701 Taiwan
E-mail: pychen@mail.ncku.edu.tw; shlin.hayashi@gmail.com; roy800117@hotmail.com 

The technique of image scaling plays a critical role in the digital image processing applications for the coordination between different display devices. In this paper, an improved algorithm is proposed by using a controllable sharpness coefficient to obtain better resulting images under different scaling magnifications. In addition, a power saving module including a condition judgment mechanism is applied to reduce unnecessary power consumption as the scaling ratio increases. Experimental results show that the proposed architecture is still feasible for very large-scale integration implementation and effectively enhances the quality of image scaling. By using TSMC 0.13 μm cell library, the synthesis results show that the circuit can achieve 300 MHz with 12.1k gate counts and cell area is 293 × 293 μm2. The total power consumption is 6.75mW. 

Keywords: controllable sharpness, image scaling, interpolation, low-power design, VLSI

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