DocumentCode :
3647589
Title :
Implementation of algorithm for detection and correction of defective pixels in FPGA
Author :
L. Mijatović;H. Dean;M. Rožić
Author_Institution :
University of Zagreb/Faculty of Electrical Engineering and Computing, Croatia
fYear :
2012
fDate :
5/1/2012 12:00:00 AM
Firstpage :
1731
Lastpage :
1735
Abstract :
Defect pixels are a common occurrence in digital camera sensors, either resulting from the manufacturing process or developing over time. Though low in quantity, they are very noticeable and can destroy the perceived quality of the images. This paper presents a method for detection and correction of defect pixels in images generated by a Bayer mosaic image sensor. We propose an online and adaptive algorithm, which analyzes the images retrieved from a Bayer array sensor on a pixel by pixel basis. We consider the values of adjacent pixels to determine if the current pixel is possibly defective, which is either confirmed or refuted by repeating the analysis in subsequent frames. For the confirmed defective pixels, interpolation is performed to restore the image quality. The algorithm is implemented on a FPGA logic device, suitable for very high frequency operation required to correct defect pixels in images produced by high definition (HD) cameras.
Keywords :
"Sensors","Algorithm design and analysis","Interpolation","Field programmable gate arrays","Cameras","Image sensors","Image color analysis"
Publisher :
ieee
Conference_Titel :
MIPRO, 2012 Proceedings of the 35th International Convention
Print_ISBN :
978-1-4673-2577-6
Type :
conf
Filename :
6240928
Link To Document :
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