> 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 -- Read our blog about news on our plugins: http://www.mbsplugins.de/ _______________________________________________ Mbsplugins_monkeybreadsoftware.info mailing list [email protected] https://ml01.ispgateway.de/mailman/listinfo/mbsplugins_monkeybreadsoftware.info
