sharpVISION™ Digital Camera
sharpVISION™ User Manual 31
Multi-page Raw Format (MRF) is an uncompressed IDT proprietary file format. Multiple raster
images are stored in a single file. The format is described below.
Each MRF file contains a file header, an image header and an array of bytes that defines the
image data bits. The image raster data is not compressed and stored in the file “as it is”. Both
8 bit and 16 bit data are supported. The file structures are the following:
8.1.8.1. File header
A MRF file begins with a file header structure containing the IDT raw file signature.
typedef struct _RCFILE_HEADER
{
char szSign[8]; // IDT raw file signature
unsigned long nReserved; // reserved
} RCFILE_HEADER, *PRCFILE_HEADER;
Members
szSign[8]: a 8 char buffer which contains the signature “IDT-MRF”. It indicates that the
remainder of the file contains a Multiple Raw File.
nReserved: this field is reserved for future use.
8.1.8.2. Image header
The file header is followed by the image header which contains general information about the
data stream.
typedef struct _RCIMG_HEADER
{
unsigned long nSize; // size of this header
unsigned long nPages; // number of pages/frames
unsigned long nWidth; // image width
unsigned long nHeight; // image height
unsigned long nBPP; // bits per pixel
unsigned long userData[64]; // user data array
} RCIMG_HEADER, *PRCIMG_HEADER;
Members
nSize: size of the structure in bytes. It should be 84.
nPages: number of images contained in the file