Processing Raw Images - Canon S110 RGB User Manual

5.2 Processing RAW images

The NIR and RE camera variants require each image to be preprocessed.
This takes place via the eMotion Flight data manager at the same time
as the image geotagging process. The processing of RAW images takes
significantly longer than processing JPEG, as this involves band arith-
metic that corrects the images and converts them into large 16-bit lin-
ear TIFF images, optimised for vegetation indices calculation. This pro-
cess prioritises accuracy over visual quality and therefore produces im-
ages that look very different (and usually dimmer) to their JPEG equiva-
lents. In order for the processing to produce correct images, the image
source camera must be first identified. This information is stored with
the flight logs, but can be modified by selecting the image source in the
eMotion Flight data manager (see below).
This RAW processing can also be applied to RAW RGB images, for exam-
ple if the RGB images are combined for index calculation with NIR or RE
images.
23