Data compression of reference images for image correlation
Abstract
Data compression techniques are considered for reference images used in image correlation. It is shown that the distance measure compatible with performance measures of cross correlation is the mean square error. The data compression technique compatible with this distance measure is transform encoding. A series of correlation experiments on three image pairs are performed to investigate the correlation performance vs. the reference image bit rate. It is shown that the acquisition performance, i.e., the probability of correct match for a given false match probability is very high for reference image bit rates as low as .1 bit/pixel. The correlation local error is less than .7 pixels for this bit rate. These high correlation performances are in spite of the significant degradation of the visual quality of the reference images.
- Publication:
-
13th Asilomar Conference on Circuits, Systems, and Computers
- Pub Date:
- 1980
- Bibcode:
- 1980ieee.conf..490M
- Keywords:
-
- Algorithms;
- Cross Correlation;
- Data Compression;
- Image Correlators;
- Image Processing;
- Error Analysis;
- Fourier Transformation;
- Power Spectra;
- Signal Encoding;
- Instrumentation and Photography