TIFF Tag Orientation
| IFD |  |
Image |
|---|---|---|
| Code | 274 (hex 0x0112) | |
| Name | Orientation | |
| LibTiff name | TIFFTAG_ORIENTATION | |
| Type | SHORT | |
| Count | 1 | |
| Default | 1 |
Description
The orientation of the image with respect to the rows and columns.
The specification defines these values:
1 = The 0th row represents the visual top of the image, and the 0th column represents the visual left-hand side.
2 = The 0th row represents the visual top of the image, and the 0th column represents the visual right-hand side.
3 = The 0th row represents the visual bottom of the image, and the 0th column represents the visual right-hand side.
4 = The 0th row represents the visual bottom of the image, and the 0th column represents the visual left-hand side.
5 = The 0th row represents the visual left-hand side of the image, and the 0th column represents the visual top.
6 = The 0th row represents the visual right-hand side of the image, and the 0th column represents the visual top.
7 = The 0th row represents the visual right-hand side of the image, and the 0th column represents the visual bottom.
8 = The 0th row represents the visual left-hand side of the image, and the 0th column represents the visual bottom.
The specification considers this a baseline tag, but does add that support for orientations other than 1 is not a Baseline TIFF requirement.
LibTiff defines these values:
ORIENTATION_TOPLEFT = 1;
ORIENTATION_TOPRIGHT = 2;
ORIENTATION_BOTRIGHT = 3;
ORIENTATION_BOTLEFT = 4;
ORIENTATION_LEFTTOP = 5;
ORIENTATION_RIGHTTOP = 6;
ORIENTATION_RIGHTBOT = 7;
ORIENTATION_LEFTBOT = 8;
Many readers ignore this tag.