Bad Pixel Notes - Canon CHDK Quick Start Manual

Sources, and for further study :–
http://encyclopedia2.thefreedictionary.com/bit%20depth
http://www.cambridgeincolour.com/tutorials/camera-sensors.htm
http://designorati.com/articles/t1/photoshop
http://encyclopedia2.thefreedictionary.com/bit%20depth
http://www.wildtramper.com/sw/crw/crw.html
http://www.howtofixcomputers.com/forums/digital-photo/bitdepth-chdk-raw-files-powershot-79781.html
http://en.wikipedia.org/wiki/RAW_image_format
http://www.photoxels.com/tutorial_raw.html
http://insights.betterphoto.com
http://chdk.setepontos.com/index.php?
PHPSESSID=7973386aacdc6fb7e1b409702af56bbb&board=15.0
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Raw Develop
Main Menu > RAW Parameters > RAW Develop
Another feature from ewavr. This allows you to select any RAW file on your SD card and then process it
into a JPG file so that you may view it in your camera. Exceptionally handy after using any of the RAW
Merge features so you can see the result without the need of a computer and extra RAW processing
software.
Choose "RAW Develop" and you will be presented with a file-browser display. Navigate to the RAW file
that you want to process into a JPG file. After pressing
"Switch Camera to Record Mode and take one shot." Press
your toggle button to exit
<ALT>
Instead of taking an image, it will take that selected RAW file and now make a JPG file from it. It will be
named according to whatever last JPG filename is in that folder and increment it by 1.
Keep in mind that the EXIF data on this new JPG file will not reflect the original RAW file. It will use
whatever camera settings were available at the time that you take the RAW Developing Shot for the
resulting EXIF data.
Note: RAW file-saving must be turned ON for this feature to work. If RAW is not turned on, or you select
a JPG file for "developing", then no action will take place.
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Bad pixel Notes

Bad, or hot pixels affect DNG images especially for long exposures. In the RAW parameters menu (Main
Menu) is "Bad pixel removal". Once you have generated a list with all the "bad" pixels for your camera
CHDK can remove them automatically. To obtain this list of hot-pixel coordinates you need to capture a
"dark frame" by shooting an image with your lens completely capped. For shutter speeds longer than 1 to
10 seconds, it's wise to keep a collection of dark-frames on hand for each exposure length that you will be
using in the future, as more warm and hot-pixels show up with extended shutter speeds. After that you
can use this program:
Contd...
mode. Press the shutter button.
<ALT>
http://ewavr.nm.ru/chdk/show_bad.zip
to select your file, you will be asked to
SET
again to back out of this menu, then use
SET
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