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Author Photoshop ignores vendor exif information
Ludovic Martin

2006-07-10, 6:18 pm

Hi

When I crop a Canon Ixus v2 photo and save it (Ctr+S), Photoshop CS only
keeps standard exif information. It erases all exif information specific to
Canon. So I need to use another tools (ExifUtils) in order to rewrite the
complet exif information.
Is it possible to prevent Photoshop from deleting vendor exif information?

Thanks


Ludovic Martin

2006-07-10, 6:18 pm

Here is an exemple:

----------------------------------------------------------
This is the exif information before edition with Phohtoshop
----------------------------------------------------------

File: - D:\Temp\IMG_2374.JPG

Make - Canon
Model - Canon DIGITAL IXUS v2
Orientation - Top left
XResolution - 180
YResolution - 180
ResolutionUnit - Inch
DateTime - 2006:03:03 12:26:51
YCbCrPositioning - Centered
ExifOffset - 196
ExposureTime - 1/8 seconds
FNumber - 2.80
ExifVersion - 0220
DateTimeOriginal - 2006:03:03 12:26:51
DateTimeDigitized - 2006:03:03 12:26:51
ComponentsConfiguration - YCbCr
CompressedBitsPerPixel - 5 (bits/pixel)
ShutterSpeedValue - 1/8 seconds
ApertureValue - F 2.80
ExposureBiasValue - 0.00
MaxApertureValue - F 2.80
MeteringMode - Multi-segment
Flash - Not fired, compulsory flash mode
FocalLength - 5.41 mm
UserComment -
FlashPixVersion - 0100
ColorSpace - sRGB
ExifImageWidth - 1200
ExifImageHeight - 1600
InteroperabilityOffset - 1412
FocalPlaneXResolution - 7741.94
FocalPlaneYResolution - 7766.99
FocalPlaneResolutionUnit - Inch
SensingMethod - One-chip color area sensor
FileSource - DSC - Digital still camera
CustomRendered - Normal process
ExposureMode - Auto
WhiteBalance - Auto
DigitalZoomRatio - 1.00 x
SceneCaptureType - Standard

Maker Note (Vendor): -
Macro mode - Normal
Self timer - Off
Quality - Superfine
Flash mode - Not fired
Sequence mode - Single or Timer
Focus mode - Single
Image size - Large
Easy shooting mode - Manual
Digital zoom - None
Contrast - Normal
Saturation - Normal
Sharpness - Normal
ISO Value - 200
Metering mode - Evaluative
Focus type - Auto
AF point selected - Auto selected
Exposure mode - Easy shooting
Focal length - 173 - 346 mm (32 mm)
Flash activity -
Flash details -
Focus mode 2 - Single
White Balance - Auto
Sequence number - 1
AF point used - Left
Flash bias - 0.00 EV
Subject Distance - 3274
Image Type - IMG:DIGITAL IXUS v2 JPEG
Firmware Version - Firmware Version 1.00
Image Number - 1232374
Owner Name - Grand Titus

----------------------------------------------------------
This is the exif information after edition with Phohtoshop
----------------------------------------------------------

File: - D:\Temp\IMG_2374.JPG

Make - Canon
Model - Canon DIGITAL IXUS v2
Orientation - Top left
XResolution - 180
YResolution - 180
ResolutionUnit - Inch
DateTime - 2006:03:03 12:26:51
YCbCrPositioning - Centered
Orientation - Top left
XResolution - 180
YResolution - 180
ResolutionUnit - Inch
Software - Adobe Photoshop CS Windows
DateTime - 2006:06:25 23:19:05
ExifOffset - 324
ExposureTime - 1/8 seconds
FNumber - 2.80
ExifVersion - 0220
DateTimeOriginal - 2006:03:03 12:26:51
DateTimeDigitized - 2006:03:03 12:26:51
ComponentsConfiguration - YCbCr
CompressedBitsPerPixel - 5 (bits/pixel)
ShutterSpeedValue - 1/8 seconds
ApertureValue - F 2.80
ExposureBiasValue - 0.00
MaxApertureValue - F 2.80
MeteringMode - Multi-segment
Flash - Not fired, compulsory flash mode
FocalLength - 5.41 mm
UserComment -
FlashPixVersion - 0100
ColorSpace - sRGB
ExifImageWidth - 1002
ExifImageHeight - 1340
InteroperabilityOffset - 1084
FocalPlaneXResolution - 7741.94
FocalPlaneYResolution - 7766.99
FocalPlaneResolutionUnit - Inch
SensingMethod - One-chip color area sensor
FileSource - DSC - Digital still camera
CustomRendered - Normal process
ExposureMode - Auto
WhiteBalance - Auto
DigitalZoomRatio - 1.00 x
SceneCaptureType - Standard



Jim

2006-07-10, 6:18 pm


"Ludovic Martin" <false.address@yahoo.fr> wrote in message
news:449eff42$0$27289$626a54ce@news.free.fr...
> Hi
>
> When I crop a Canon Ixus v2 photo and save it (Ctr+S), Photoshop CS only
> keeps standard exif information. It erases all exif information specific
> to Canon. So I need to use another tools (ExifUtils) in order to rewrite
> the complet exif information.
> Is it possible to prevent Photoshop from deleting vendor exif information?
>
> Thanks
>

Yes, when you save the file, PS does not save the EXIF data. Adobe would be
the only one who could change this behavior because it is their code which
does not write vendor specific EXIF data. As every save creates a brand ned
file, the OS deletes the entire old file.
Jim


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