Ok, Christian, thanks for explanation and advice. I saw that stegano (watermark) adds a watermark image in an image. I'm wondering if there is a function for reading or getting this hidden watermark. I didn't find it in your doc.
TIA Jean-Luc Arnaud Le 04/03/2016 11:50, Christian Schmitz a écrit : >> Am 04.03.2016 um 10:12 schrieb Jean-Luc Arnaud <[email protected]>: >> >> Hi all, >> >> Using SetSteganographyMBS, I discovered these two problems: >> - Saving the modified picture as a JPeg file, the picture is still >> openable in Xojo and the steganographic text is present, but the file no >> longer opens in the Mac OS Finder, nor in Preview or GraphicConverter, > Really? But JPEG compression destroys the stegano part. > >> - Saving the modified picture as PNG file (as described in the MBS doc), >> all is working, but converting it to JPEG, the steganographic text >> disappears. > right. > >> So it seems like JPed is really not adapted to Steganography usage > sure. It's removes details to lower file size. > >> My question is: is it possible to sign a picture (steganograpy or >> Watermark) making the signature impossible (at least difficult) to be >> detected/deleted? > With JPEGExporterMBS class you can add markers which is just extra data in > the JPEG stream. > > Sincerely > Christian > _______________________________________________ Mbsplugins_monkeybreadsoftware.info mailing list [email protected] https://ml01.ispgateway.de/mailman/listinfo/mbsplugins_monkeybreadsoftware.info
