lost coordinate after steganography

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feri 2024-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/2149954-lost-coordinate-after-steganography

评论： DGM 2024-9-6

why after exporting the .tiff steganography results the geometry correction disappears? so I have a tiff that already has coordinates, when the steganography process is finished the coordinates disappear.

please help thank you

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feri 2024-9-6

aerial photography, datum WGS1984.

How to restore coordinates lost due to the steganography process?

DGM 2024-9-6

As far as I know, any sort of time/date/geolocation metadata is not stored in the raster image. It's stored in the file header. You need to write all that info into the new file. If you don't copy it, it won't be there.

How you do that depends on what sort of TIFF it is.

https://www.mathworks.com/help/matlab/ref/tiff.html

https://www.mathworks.com/help/map/functions-that-read-and-write-geospatial-data.html

I'm not really familiar with geoTIFF, and I have an older version without some of the newer tools, so you'll have to look at what metadata your original file has and figure out how to set those tags in the new file.

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