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A New Region of Interest Coding Algorithm Based on JPEG2000 for Remote Sensing Images and Its VLSI Design |
WANG Jianxin ZHU En LIU Wensong QI Youjie |
(School of Information Science and Engineering, Southeast University, Nanjing 211100, China) |
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Abstract To resolve the conflict between the amount of image data and the channel bandwidth, a Region Of Interest (ROI) coding method based on JPEG2000 is proposed in this paper. The mainstream methods for JPEG2000 ROI coding have a difficulty in balancing ROI quality and system computation, and have a hidden trouble in losing background completely at a low bit rate. The proposed method achieves ROI coding by precisely controlling the accuracy of background coefficients in each subband. The human visual property is introduced to obtain better visual effect with limited background codestream. Also, the Very Large Scale Integration (VLSI) design of the proposed method for the rectangle ROI is proposed. This design can be suitable for the mainstream ROI methods for JPEG2000 by some necessary adjustments. Experimental results show that the proposed method obtains an excellent performance in ROI quality and visual effect of the reconstructed images, supports arbitrary ROI shape coding, and is compatible with the standard. The VLSI design only adds one clock cycle on the coding time of JPEG2000 system, has a high throughput, and satisfies real-time applications.
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Received: 08 July 2015
Published: 03 February 2016
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Fund: The National Natural Science Foundation of China (61271058) |
Corresponding Authors:
ZHU En
E-mail: zhuenpro@seu.edu.cn
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