In digital camera inchoate (namely not long ago) , only the high-end camera of a few supports original document form, basically have a fever by professional and technology friend is used. But in recent years the circumstance differred already completely, decent digital watch for a chance supports primitive form, the person that has this kind of watch for an opportunity can use this kind of form. Previously, only advanced cameraman just needs to understand how to handle the detail of primitive data file, and any digital cameraman must understand the knowledge that concerns this kind of technique now. Why is this chapter the explanation primitive data file, discuss its relative to the actor defect at JPEG, offer about how to make the exposure of the photograph spends first-rate proposal, discuss how to be used " Adobe camera is primitive data " transaction file.

What is file of 9.1 primitive data
What one word of Raw points to is not the food that cook crosses or coarse, not fine and not perfect thing; The primitive data that provides in digital camera (Raw) in the file, the meaning of one word of Raw is about the same also.

Digital camera is to store image by the setting when JPEG or TIFF, the processor of the buy inside camera has the primitive data that provides to image sensor handling: The image that develops possibly according to manufacturer optimizes regulation to be opposite color, lubricious harmonic contrast undertakes adjustment. Additional, give image before the facility that takes oneself undertakes handling, camera carries out other adjustment possibly also, if adjust degree of saturation and acute,change. Finally, if use JPEG form, the file will be compressed (this means some information to will be discarded) , in writing its memory to get stuck as 8 files next.

Use camera is primitive when the file, do not carry out any additional processing. This kind of file includes the primitive data that the image sensor of camera records only. Divide these basic exposure data (the content that the record when filming comes down) outside, primitive data file still is included about filmed metadata. Metadata follows camera and different, but include such as mode of focal length of information of Bai Pingheng, exposure, camera lens, estimate, flashy wait for information.
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