Techniques for efficient storage and retrieval of industrial radiographs. Final report
The objective of this study is to investigate techniques to improve the efficiency of industrial radiograph storage and retrieval (RSR). A representative radiograph of a portion of a butt weld in 26-in. pipe was analyzed for information content by scanning with a microdensitometer and also by digitizing a portion of the image using several spatial resolutions. The storage techniques considered in this study include digital storage on magnetic disk or tape and analog storage on video tape, 35 mm film or optical video disk. In order to increase the efficiency of storage and also to enhance details in the radiographs, several image enhancement and data compression techniques were investigated, including optical image processing, analog signal processing of a scanned image, and digital enhancement and image coding techniques. Digital magnetic tape was selected as the most practical storage medium which can provide automated search and retrieval capability and is compatible with the powerful digital image enhancement techniques currently available. A representative digital radiograph storage and retrieval system based on off-the-shelf equipment is described and analyzed in terms of its cost and performance. The equipment cost is estimated to be $80,000. Depending on the degree of data compression used, the storage volume for a digital RSR system ranges from slightly less than that required for the original radiograph to almost an order of magnitude less as the number of radiographs per 10.5 in. reel of tape ranges from 19 to 120. The corresponding tape cost ranges from about $1.00 to $0.17 per radiograph. In conclusion, it appears that the benefits obtained from a digital RSR system could easily result in overall cost savings by reducing the time required to locate, interpret and document the radiograph of a particular part.
- Research Organization:
- Science Applications, Inc., San Diego, CA (USA)
- OSTI ID:
- 5256912
- Report Number(s):
- EPRI-NP-2383; ON: DE82904372; TRN: 82-013641
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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