PNG Tags
Index | Tag Name |
Writable | Values / Notes |
0 |
ImageWidth |
N |
|
4 |
ImageHeight |
N |
|
8 |
BitDepth |
N |
|
9 |
ColorType |
N |
0 = Grayscale
2 = RGB
3 = Palette
4 = Grayscale with Alpha
6 = RGB with Alpha |
10 |
Compression |
N |
0 = Deflate/Inflate |
11 |
Filter |
N |
0 = Adaptive |
12 |
Interlace |
N |
0 = Noninterlaced
1 = Adam7 Interlace |
|
Index | Tag Name |
Writable | Values / Notes |
0 |
WhitePointX |
N |
|
1 |
WhitePointY |
N |
|
2 |
RedX |
N |
|
3 |
RedY |
N |
|
4 |
GreenX |
N |
|
5 |
GreenY |
N |
|
6 |
BlueX |
N |
|
7 |
BlueY |
N |
|
|
The PNG TextualData format allows aribrary tag names to be used. The tags
listed below are the only ones that can be written (unless new user-defined
tags are added via the configuration file), however ExifTool will extract
any other TextualData tags that are found.
Data for the TextualData tags may be stored as tEXt, zTXt or iTXt chunks in
the PNG image. ExifTool will read and edit tags in their original form, but
new string tags are created as uncompressed tEXt by default, or as
compressed zTXt if the -z (Compress) option is used and Compress::Zlib is
available. Raw profile information is always created as compressed zTXt if
Compress::Zlib is available, and standard XMP is written as iTXt.
Some of the tags below are not registered as part of the PNG specification,
but are included here because they are generated by other software such as
ImageMagick.
Tag ID | Tag Name |
Writable | Values / Notes |
'Artist' |
Artist |
string |
(unregistered) |
'Author' |
Author |
string |
|
'Comment' |
Comment |
string |
|
'Copyright' |
Copyright |
string |
|
'Creation Time' |
CreationTime |
string |
|
'Description' |
Description |
string |
|
'Disclaimer' |
Disclaimer |
string |
|
'Document' |
Document |
string |
(unregistered) |
'Label' |
Label |
string |
(unregistered) |
'Make' |
Make |
string |
(unregistered) |
'Model' |
Model |
string |
(unregistered) |
'Raw profile type APP1' |
APP1_Profile |
- |
--> EXIF Tags
--> XMP Tags |
'Raw profile type exif' |
EXIF_Profile |
- |
--> EXIF Tags |
'Raw profile type icc' |
ICC_Profile |
- |
--> ICC_Profile Tags |
'Raw profile type icm' |
ICC_Profile |
- |
--> ICC_Profile Tags |
'Raw profile type iptc' |
IPTC_Profile |
- |
--> Photoshop Tags |
'Raw profile type xmp' |
XMP_Profile |
- |
--> XMP Tags |
'Software' |
Software |
string |
|
'Source' |
Source |
string |
|
'TimeStamp' |
TimeStamp |
string |
(unregistered) |
'Title' |
Title |
string |
|
'URL' |
URL |
string |
(unregistered) |
'Warning' |
PNGWarning |
string |
|
'XML:com.adobe.xmp' |
XMP |
- |
--> XMP Tags
(unregistered, but this is the location according to the XMP specification,
and is where ExifTool will add a new XMP chunk if the image didn't already
contain XMP) |
'create-date' |
CreateDate |
string |
(unregistered) |
'modify-date' |
ModDate |
string |
(unregistered) |
|
Index | Tag Name |
Writable | Values / Notes |
0 |
PixelsPerUnitX |
N |
|
4 |
PixelsPerUnitY |
N |
|
8 |
PixelUnits |
N |
0 = Unknown
1 = Meters |
|
Index | Tag Name |
Writable | Values / Notes |
0 |
SubjectUnits |
N |
1 = Meters
2 = Radians |
1 |
SubjectPixelWidth |
N |
|
2 |
SubjectPixelHeight |
N |
|
|
Index | Tag Name |
Writable | Values / Notes |
0 |
StereoMode |
N |
0 = Cross-fuse Layout
1 = Diverging-fuse Layout |
|
Index | Tag Name |
Writable | Values / Notes |
0 |
VirtualImageWidth |
N |
|
1 |
VirtualImageHeight |
N |
|
2 |
VirtualPageUnits |
N |
|
|
(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Mar 9, 2010
<-- ExifTool Tag Names