how to write metadata information to a jpg file
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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!
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Stephen23
le 24 Fév 2019
Also:
2 commentaires
Walter Roberson
le 24 Fév 2019
tl;dr : Comment is the only metadata that Matlab itself supports writing.
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