Stranica 84 [84]
OCR
cas A NI 7 iii. UV-reflected Images The workflow shown in Figure 2-27 summarises the corrections proposed as a result of the discussions in Chapter 1 and also highlights the general transformations to be carried out by the post-processing software. FREESE Camera output Corrected for Corrected Corrected UV False colour spatial for reflected image image inhomogeneities Spectral of light source density (Flat fielding) Image registration Figure 2-27. Schematic of the workflow proposed for UV-reflected images. The requirements in order to carry out the image correction procedure are as follows and are included as a checklist at the end of the image capture workflow (see below): 1) The camera output file, i.e. the UV-reflected image; 2) The ICC profile (which records all the metadata including the gamma correction applied to the image. This describes and is created on the conversion from RAW into a standard 16bit TIFF file, see Chapter 3). This profile is contained within the TIFF file and is automatically retrieved by the post-processing software; 3) An image of a uniform reflective board under the same experimental conditions for flat fielding, if available; 4) An image of a Spectralon diffuse reflectance grey scale or any number of Spectralon diffuse reflectance standards as available (included as part of the image to be calibrated or another image taken with the same camera and lighting conditions); 5) A visible-reflected image (including a Spectralon diffuse reflectance grey scale or any number of Spectralon diffuse reflectance standards as available) obtained as described in section i (See above). Version No. 1.0 76 Date : 14/10/2013
