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We have seen how existing JPEG images can be edited using this
program, the only difference when you “develop” the CR2 RAW file is the
addition control of “de-mosaic” and noise reduction.
De-mosaic is required to decode the pattern of the Red, Green and Blue
filter distribution pattern used on the sensor.
Traditionally in a “Bayer” filter system there are twice as many green
filters to make the response of the sensor more “in tune” with the
luminance (brightness) characteristic of our eyes.
Once the image data has been “re-constructed” it can be reduced in
noise, you controlling the amount of blur applied to mask either noise in
the color (chrominance) or brightness (luminance) channels.
This is where you make the most significant improvement over in camera
JPEG processed files.
A camera RAW file showing the sharpness adjustment control
There are a lot of adjustments which you can apply to “develop” the
camera RAW data however, if you just open the file and leave the default
“auto” parameters you will find that you may not need to adjust anything
as the results are pretty good.
If you want to try and improve image detail with noise reduction and
sharpening then you have this option, something you didn’t get when the
camera processed the JPEG file.
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