Conference proceeding
Influence of dictionary size on the lossless compression of microarray images
TWENTIETH IEEE INTERNATIONAL SYMPOSIUM ON COMPUTER-BASED MEDICAL SYSTEMS, PROCEEDINGS, pp.237-242
IEEE International Symposium on Computer-Based Medical Systems
01/01/2007
DOI: 10.1109/CBMS.2007.61
Abstract
A key challenge in the management of microarray data is the large size of images that constitute the output of microarray experiments. Therefore, only the expression values extracted from these experiments are generaly made available. However, the extraction of expression data is effected by a variety of factors, such as the thresholds used for background intensity correction, method used for grid determination, and parameters used in foreground (spot)-background delineation. This information is not always available or consistent across experiments and impacts downstream data analysis. Furthermore, the lack of access to the image-based primary data often leads to costly replication of experiments. Currently, both lossy and lossless compression techniques have been developed for microarray images. While lossy algorithms deliver better compression, a significant advantage of the lossless techniques is that they guarantee against loss of information that is putatively of biological importance. A key challenge therefore is the development of more efficacious lossless compression techniques. Dictionary-based compression is one of the critical methods used in lossless microarrray compression. However, the image-based microarray data has potentially infinite variability. So the selection and effect of the dictionary size on the compression rate is crucial. Our paper examines this problem and shows that increasing the dictionary size beyond a certain size, does not lead to better compression. Our investigations also point to strategies for determining the optimal dictionary size.
Details
- Title: Subtitle
- Influence of dictionary size on the lossless compression of microarray images
- Creators
- Robert Bierman - San Francisco State UniversityRahul Singh - San Francisco State University
- Contributors
- P Kokol (Editor)V Podgorelec (Editor)D MiceticTurk (Editor)M Zorman (Editor)M Verlic (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- TWENTIETH IEEE INTERNATIONAL SYMPOSIUM ON COMPUTER-BASED MEDICAL SYSTEMS, PROCEEDINGS, pp.237-242
- Publisher
- IEEE
- Series
- IEEE International Symposium on Computer-Based Medical Systems
- DOI
- 10.1109/CBMS.2007.61
- ISSN
- 2372-9198
- eISSN
- 2372-9198
- Number of pages
- 2
- Language
- English
- Date published
- 01/01/2007
- Academic Unit
- Computer Science
- Record Identifier
- 9984446538002771
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