Title :
Gray-scale resolution enhancement
Author :
Gunturk, B.K. ; Altunbasak, Y. ; Mersereau, R.
Author_Institution :
Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The number of bits assigned to represent the color intensity at image pixels is usually referred as the bit depth. When the bit depth is not sufficient, images suffer from ridge-like structures known as false contours. Bit-depth limitations become important when low-contrast details are required, as in medical imaging, aerial/satellite photography, and high-quality scanning: applications. In this paper, we investigate a method for increasing bit depth. Specifically, we show that when a sequence of video frames is available, then it is possible to achieve a higher bit depth through a projections onto convex sets (POCS) based reconstruction method
Keywords :
image colour analysis; image enhancement; image representation; image resolution; image sequences; video signal processing; POCS based reconstruction method; aerial photography; bit depth; color intensity; false contours; gray-scale resolution enhancement; high-quality scanning applications; image pixels; low-contrast details; medical imaging; projections onto convex sets based reconstruction method; ridge-like structures; satellite photography; superprecision; video frames sequences; Apertures; Biomedical imaging; Gray-scale; High-resolution imaging; Image converters; Image reconstruction; Image resolution; Image sensors; Pixel; Spatial resolution;
Conference_Titel :
Multimedia Signal Processing, 2001 IEEE Fourth Workshop on
Conference_Location :
Cannes
Print_ISBN :
0-7803-7025-2
DOI :
10.1109/MMSP.2001.962727
