JEITA CP-3451 Explication
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b) Trimming
c) Image retouching (exposure bias, adjustment of white balance, brightness, contrast, sharpness, etc.)
d) Red-eye reduction (partial image retouching)
e) Special processing (sepia processing, monochrome processing or other processing affecting the entire image)
In sections 7.4.3 and following, the tags that can be copied unchanged and those that need to be updated are
indicated. If multiple processing was performed (e.g., rotation plus trimming) and tag handling differs for each
process, "Update tag value" takes precedence. If the changed Exif image file does not contain the tags listed here,
the saved file after alteration should not include them either. Tag handling examples for each IFD are given in the
following sections
7.4.3 0th IFD
The following tags should be copied unchanged.
−ImageDescription; ID= 270
−Make; ID= 271
−Model; ID= 272
−Xresolution; ID= 282
−Yresolution; ID= 283
−ResolutionUnit; ID= 296
−TransferFunction; ID= 301
−Artist; ID= 315
−WhitePoint; ID= 318
−PrimaryChromaticities; ID= 319
−YcbCrCoefficients; ID= 529
−ReferenceBlackWhite; ID= 532
−Copyright; ID= 33432
Examples of the preferred tag handling for each type of processing are given below.
Explication Table 3 0th IFD tag handling examples
Tag
Rotation
Trimming
Retouch
Red-eye
Special
Orientation
ID=274
Set to 1
Set to 1
Set to 1
Set to 1
Set to 1
YCbCrPositionin
g
ID= 531
Update
value
Update
value
Update
value
Update
value
Update
value
Software
ID=305
Change
to
name of used
software
Change
to
name of used
software
Change
to
name of used
software
Change
to
name of used
software
Change
to
name of used
software
DateTime
ID=306，
Changed to
saved
date
and time
Changed to
saved
date
and time
Changed to
saved
date
and time
Changed to
saved
date
and time
Changed to
saved
date
and time
