Oldal 94 [94]
OCR
v. Visible-induced Infrared Luminescence (VIL) Images The workflow shown in Figure 2-33 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. Camera output Corrected for Corrected for Corrected for spatial ambient stray “pigmentinhomogeneities light binder” of light source interaction (Flat fielding) Figure 2-33. Schematic of the workflow proposed for Visible-induced infrared luminescence 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. Visible-induced infrared luminescence 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); 6) Image of uniform reflective board under experimental conditions for flat fielding the visible-reflected image; 7) An IR-reflected image (including a Spectralon diffuse reflectance grey scale or any number of Spectralon diffuse reflectance standards as available) obtained as described in section ii (See above); 8) Image of uniform reflective board under experimental conditions for flat fielding the IRreflected image. Version No. 1.0 86 Date : 14/10/2013
