I am impressed! It seems that you must know of what you say. Well done!
Terry said:
Am I just not looking in the right place? In IrfanView's EXIF
fields I can't find what I'd understood was a 'standard' one,
Image Description?
When I view a JPG with EXIF info I see:
File: - X:\...\...\picture.jpg
ImageDescription -
Make - SONY
Model - CYBERSHOT
Orientation - Top left
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
DateTime - 2003:05:10 07:46:12
YCbCrPositioning - Co-Sited
ExifOffset - 218
ExposureTime - 1/40 seconds
FNumber - 2.80
ExposureProgram - Normal program
ISOSpeedRatings - 100
ExifVersion - 0210
DateTimeOriginal - 2003:05:10 07:46:12
DateTimeDigitized - 2003:05:10 07:46:12
ComponentsConfiguration - YCbCr
CompressedBitsPerPixel - 2 (bits/pixel)
ExposureBiasValue - 0.00
MaxApertureValue - F 2.83
MeteringMode - Center weighted average
LightSource - Auto
Flash - Fired
FocalLength - 6.90 mm
FlashPixVersion - 0100
ColorSpace - sRGB
ExifImageWidth - 640
ExifImageHeight - 480
InteroperabilityOffset - 642
FileSource - DSC - Digital still camera
SceneType - A directly photographed image
Maker Note (Vendor): -
BTW, those codes that IrfanView > Help lists for EXIF and IPTC,
like $I120 for IPTC Caption and $E36867 for EXIF DateTimeOriginal
etc, are they unique to IrfanView? I'd always assumed they were
some sort of 'universal' standard, used by various programs, but
it seems I'm wrong.
The Help file states the info is from IPTC and EXIF specifications.
A cursory review of the EXIF 2.2 Specification by JEITA, April 2002.
at <
http://www.exif.org/specifications.html> supports Irfan's
documentation. For example the "$E36867" mentioned above:
4.6.5 Exif IFD Attribute Information
F. Tags Relating to Date and Time
Tag Name - Date and time of original data
Field Name - DateTimeOriginal
Tag ID
Dec - 36867
Hex - 9003
Type - ASCII
Count - 20
