DCRAW Level

Name	Id	Type	Value Type	Value	Value Length	Read Only
"Common"	IGMDTAG_ID_DCRAW_COMMON	LEVEL_START	0	NULL	0	TRUE
"EXIF"	IG_FORMAT_EXIF_TIFF	LEVEL_START	0	NULL	0	TRUE
"TIFF"	IG_FORMAT_TIF	LEVEL_START	0	NULL	0	TRUE
"CIFF"	IG_FORMAT_CIFF	LEVEL_START	0	NULL	0	TRUE
"Statistics"	IGMDTAG_ID_DCRAW_STATISTICS	LEVEL_START	0	NULL	0	TRUE

Common Level

The Common sub-tree contains values that are common or useful for all raw files.

All values in the Common sub-tree have Type = VALUE_ITEM and are Read Only.

Name	Id	Description
AsShotNeutral	IGMDTAG_ID_DCRAW_ASSHOTNEUTRAL	Specifies the selected white balance at time of capture, encoded as the coordinates of a perfectly neutral color in linear reference space values.
BaselineExposure	IGMDTAG_ID_DCRAW_BASELINEEXPOSURE	Specifies baseline exposure of the camera, in EV units. Application may use this value to adjust exposure compensation for particular camera model.
BitsPerSample	IGMDTAG_ID_DCRAW_BITSPERSAMPLE	Bits per sample in the original raw image (before reconstruction)
BlackLevelRepeatDim	IGMDTAG_ID_DCRAW_BLACKLEVELREPEATDIM	This tag specifies repeat pattern size for the "BlackLevel" tag.
CalibrationIlluminant1	IGMDTAG_ID_DCRAW_CALIBRATIONILLUMINANT1	The illuminant used for ColorMatrix1 color conversion matrix. Allowed values are the same as allowed values for LightSource EXIF tag (see Exif specification).
CalibrationIlluminant2	IGMDTAG_ID_DCRAW_CALIBRATIONILLUMINANT1	The illuminant used for ColorMatrix2 color conversion matrix. Allowed values are the same as allowed values for LightSource EXIF tag (see Exif specification).
CFAPattern	IGMDTAG_ID_DCRAW_CFAPATTERN	This tag encodes the actual color filter array geometric pattern of the image sensor used to capture the single sensor color image.
CFARepeatPatternDim	IGMDTAG_ID_DCRAW_CFAREPEATPATTERNDIM	This tag encodes the number of pixels horizontally and vertically that are needed to uniquely define the repeat pattern of the color filter array.
ColorMatrix1	IGMDTAG_ID_DCRAW_COLORMATRIX1	Conversion matrix from XYZ to camera color space, for illuminant specified by CalibrationIlluminant1 tag. Matrix is stored in row scan order.
ColorMatrix2	IGMDTAG_ID_DCRAW_COLORMATRIX2	Conversion matrix from XYZ to camera color space, for illuminant specified by CalibrationIlluminant2 tag. Matrix is stored in row scan order.
ColorPlanes	IGMDTAG_ID_DCRAW_COLORPLANES	Number of colors in the CFA pattern
ImageHeight	IGMDTAG_ID_DCRAW_IMAGEHEIGHT	Image height after that masked pixels were trimmed out
ImageWidth	IGMDTAG_ID_DCRAW_IMAGEWIDTH	Image width after that masked pixels were trimmed out
Make	IGMDTAG_ID_DCRAW_MAKE	Name of the camera manufacturer
Model	IGMDTAG_ID_DCRAW_MODEL	Name of the camera model
PhotometricInterpretation	IGMDTAG_ID_DCRAW_PHOTOMETRICINTERPRETATION	TIF_PHOTO_CFA, TIF_PHOTO_RGB
RawHeight	IGMDTAG_ID_DCRAW_RAWHEIGHT	Raw Image Height, including masked pixels
RawLeft	IGMDTAG_ID_DCRAW_RAWLEFT	X coordinate of first column of non-masked pixels
RawTop	IGMDTAG_ID_DCRAW_RAWTOP	Y coordinate of first row of non-masked pixels
RawWidth	IGMDTAG_ID_DCRAW_RAWWIDTH	Raw Image Width, including masked pixels
SamplesPerPixel	IGMDTAG_ID_DCRAW_SAMPLESPERPIXEL	Number of samples per pixel in the original image, before reconstruction
TimeStamp	IGMDTAG_ID_DCRAW_TIMESTAMP	Time stamp
UniqueCameraModel	IGMDTAG_ID_DCRAW_UNIQUECAMERAMODEL	Unique, non-localized name for the camera model that created the image in the raw file.
WhiteLevel	IGMDTAG_ID_DCRAW_WHITELEVEL	Image pixel value that corresponds to fully saturated encoding Level.

Format-Specific Level

This Level includes format-specific metadata that is found in the image (EXIF, TIFF or CIFF). See corresponding sections for structure of metadata for these formats.

Statistics

This section contains data which is collected during image loading, rather than obtained from image's header or metadata. Only image loading functions, such as IG_fltr_load_file, generate this section. Header reading functions, such as IG_info_get, do not generate it.

For some cameras ImageGear uses predefined values for BlackLevel, so they are not calculated from pixel data. In this case, ImageGear also places BlackLevel tag to Statistics section, rather than in Common section, for uniformity reasons.

The following tags can be present in the Statistics section:

Name	Id	Description
BlackLevelRepeatDim	IGMDTAG_ID_DCRAW_BLACKLEVELREPEATDIM	This tag specifies repeat pattern size for the "BlackLevel" tag.
BlackLevel	IGMDTAG_ID_DCRAW_BLACKLEVEL	This tag specifies the zero light (a.k.a. thermal black or black current) encoding Level. It is calculated during image loading by averaging pixel values in the masked areas of the image.