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| Image reconstruction with superresolution based on projection modification and POCS |
| 1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China; 2. School of Automation, Southeast University, Nanjing, Jiangsu 210096, China |
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Abstract To solve the Gibbs artifacts in traditional POCS algorithm for image reconstruction in superresolution technology, an algorithm was proposed based on projection modification. An edge constraint operator was obtained by dealing with the initial image based on directiondifference method. Combining the edge constraint operator with difference between prior and current reconstruction results, the projection modification operator was used to modify the residual threshold and point spread function at each iteration process. The data consistency projection process was modified to reconstruct the highresolution image based on the improved algorithm. The experimental results show that the improved algorithm has good peak signal to noise ratio (PSNR) with effective restraint to the Gibbs artifacts.
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Received: 19 August 2012
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2013, Vol. 34 
