ImageEn Forum - Read and Write Hidden Data To Jpeg

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Read and Write Hidden Data To Jpeg

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w2m

USA
1990 Posts

Posted - Dec 04 2014 : 08:12:25

Is it possible to save hidden text directly in a jpeg images header or to the jpg file?

// Write "copyright by XYZ" in 'alfa.jpg'
ImageEnView1.Proc.WriteHiddenText('Copyright by XYZ');
ImageEnView1.IO.SaveToFile('alfa.jpg');

// Read simple string from 'alfa.jpg'
ImageEnView1.IO.LoadFromFile('alfa.jpg');
mystring:=ImageEnView1.Proc.ReadHiddenText;

Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development

xequte

39141 Posts

Posted - Dec 04 2014 : 16:38:17

Hi Bill

WriteHiddenText embeds the data within the image itself, so naturally it will not be compatible with a lossy format such as JPEG (as the hidden data would be corrupted).

But you could use EXIF or ITPC data fields and encode your data in some way.

Nigel
Xequte Software
www.xequte.com
nigel@xequte.com

w2m

USA
1990 Posts

Posted - Dec 04 2014 : 17:02:38

Thanks Nigel,

Yea, I am saving to EXIF Field now but I thought maybe it could be saved in the header, but I guess not.

Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development

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