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TIFF Tag ResolutionUnit

IFDImage
Code296 (hex 0x0128)
NameResolutionUnit
LibTiff nameTIFFTAG_RESOLUTIONUNIT
TypeSHORT
Count1
Default2 (Inch)

Description

The unit of measurement for XResolution and YResolution.

To be used with XResolution and YResolution.

The specification defines these values:

1 = No absolute unit of measurement. Used for images that may have a non-square aspect ratio, but no meaningful absolute dimensions.
2 = Inch.
3 = Centimeter.

LibTiff defines these values:

RESUNIT_NONE = 1;
RESUNIT_INCH = 2;
RESUNIT_CENTIMETER = 3;

Related tags

XResolution
YResolution