Canon 10D User Guide (en)

Digital Photo Professional (hereinafter, “DPP”) is high-performance RAW 
image processing, viewing and editing software for EOS DIGITAL 
cameras. It is often thought that RAW images are difficult to handle 
compared with ordinary JPEG images, but using DPP, you can perform 
advanced edits and print RAW images with ease. 
RAW Images and Their Features
A RAW image is image data that has recorded output data of imaging 
sensor. Because image processing does not occur inside the camera 
when a photo is taken and the photo has been recorded in the special 
form of “RAW image data + Image processing conditions information at 
the time of shooting”, special software is needed to view or edit the 
* “RAW” means “in a natural condition” or “not processed or refined”.
If described in terms of film, the concept of a RAW image is a shot 
image not yet developed (latent image).
With film, the image appears for the first time when it is developed. And 
as for the RAW image, too, you cannot view it as an image on your 
computer unless you perform subsequent image signal processing.
Therefore, even though it is digital, this processing is called 
“development” and with EOS DIGITAL is performed using DPP.
With DPP, you can view, edit and print RAW images without having to be 
particularly conscious of the development processing.
What is a RAW Image?
What is RAW Development?
RAW images are recorded in the format “RAW image data + Image 
processing conditions information at the time of shooting”. When you 
open an image in DPP, the image is instantly developed and you can 
view the image as an image to which image processing conditions at the 
time of shooting have been applied.
Even if you perform various adjustments to the image you have opened 
(it undergoes automatic development processing each time), only the 
image processing conditions (development conditions) change and the 
“original image data itself” remains unaffected. Consequently, image 
deterioration is not a problem and it is the perfect image data for users 
who want to get creative with their images after they have been shot. 
In DPP, the “Image processing conditions information” that can be 
adjusted is called a “Recipe”.
What Advantages Does a RAW Image Have?
RAW image data 
Image processing conditions information