The Development of an Image Manipulation Facility for the Assessment
Abstract
The assessment of CCD systems using photosimulation is the tried and tested alternative to performing live observer trials. The greater control over photosimulations allows an increased level of confidence in the results of any comparisons. It also requires less time in the field for a smaller number of personnel. The next step along this route would be a method that required no time in the field. Virtual reality systems, however, do not yet produce the level of realism required. An alternative, perhaps, is to place targets generated by VR software into a scene recorded photographically. Such a system would digitize a slide of a background scene in a controlled manner and allow the realistic implantation of an artificially created target. Reproduction would be achieved using a calibrated film printer. The majority of the reprinted scene would remain identical to the original slide. The methods used to enable the calibration of the equipment used, and the process of comparing information from digital rgb and Lab colour spaces are discussed in this paper. This image manipulation facility has the potential to bypass the field trial phase of CCD assessment. It could be used to assess CCD more thoroughly by using a variety of background scenes or the same scene at different times of the year. Targets created from CAD models could be assessed. It could be used to determine the effectiveness of potential CCD measures in areas which are not readily accessible. Overall, this system adds a new level of flexibility and completeness to photosimulation. Keywords: Assessment, photosimulation, imagery, slide, scanner, printer, colour, calibration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2000
- Accession Number
- ADP010554
Entities
People
- A. W. Houlbrook