how to write metadata information to a jpg file

34 vues (au cours des 30 derniers jours)
Michael Phillips
Michael Phillips le 23 Fév 2019
Commenté : Michael Phillips le 25 Fév 2019
Hello,
I'm reading in .JPG files taken with a Phantom 4pro drone. These files have the following meta data that I can grab with "imfinfo":
Filename: '/Volumes/Utumno/Chile_2016/SG-161018-51m_images_only/101MEDIA/DJI_0112.JPG'
FileModDate: '18-Oct-2016 10:33:46'
FileSize: 5672512
Format: 'jpg'
FormatVersion: ''
Width: 4000
Height: 3000
BitDepth: 24
ColorType: 'truecolor'
FormatSignature: ''
NumberOfSamples: 3
CodingMethod: 'Huffman'
CodingProcess: 'Sequential'
Comment: {}
ImageDescription: 'DCIM\101MEDIA\DJI_0112.JPG'
Make: 'DJI'
Model: 'FC330'
Orientation: 1
XResolution: 72
YResolution: 72
ResolutionUnit: 'Inch'
Software: 'v01.19.5266'
DateTime: '2016:10:18 10:33:43'
YCbCrPositioning: 'Centered'
DigitalCamera: [1×1 struct]
GPSInfo: [1×1 struct]
UnknownTags: [3×1 struct]
ExifThumbnail: [1×1 struct]
I am manipulating these images and want to save them back out as a JPG with the same metadata that they strated with. However, when I save back out as a JPG the only metadata I can get to save are the following fields:
Filename: '/Volumes/Utumno/Chile_2016/SG-161018-51m_images_only/101MEDIA/rad_corr/test.JPG'
FileModDate: '23-Feb-2019 16:55:09'
FileSize: 2666899
Format: 'jpg'
FormatVersion: ''
Width: 4000
Height: 3000
BitDepth: 24
ColorType: 'truecolor'
FormatSignature: ''
NumberOfSamples: 3
CodingMethod: 'Huffman'
CodingProcess: 'Sequential'
Comment: {}
which means I'm missing the latter 14 fields. How can I save this ancillary information with my newly manipulated JPGs?
thanks!

Réponse acceptée

Stephen23
Stephen23 le 24 Fév 2019
  2 commentaires
Walter Roberson
Walter Roberson le 24 Fév 2019
tl;dr : Comment is the only metadata that Matlab itself supports writing.
Michael Phillips
Michael Phillips le 25 Fév 2019
Thanks Stephen! This is the link that really helped:
If you're running MATLAB on a Mac though you have to change
test = which('exiftool.exe');
to
test = '/usr/local/bin/exiftool'
or whatever path is appropriate for where you've downloaded the exiftool.
Thanks again!

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Image Processing Toolbox dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by