Comments on: SignMyImage Protects Your Image with Invisible Signature http://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/?utm_source=rss&utm_medium=rss&utm_campaign=signmyimage-protects-your-image-with-invisible-signature Daily updated news of useful advanced computer tips and tricks Fri, 25 May 2012 15:54:13 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Icsu11http://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-481523 Icsu11 Tue, 06 Jul 2010 01:29:22 +0000 http://www.raymond.cc/blog/?p=5743#comment-481523 Lo que a mí me gustaría en realidad es poner una imágen invisible sobre una fotografía... Hasta hoy no sé como se puede hacer así que si alguien tiene alguna información, le agradecería me dijera. Lo que a mí me gustaría en realidad es poner una imágen invisible sobre una fotografía…
Hasta hoy no sé como se puede hacer así que si alguien tiene alguna información, le agradecería me dijera.

]]> By: Brian E.http://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-453008 Brian E. Thu, 08 Oct 2009 03:21:56 +0000 http://www.raymond.cc/blog/?p=5743#comment-453008 So, how do I place the stamp on my photographs for my customers like Otis Mills does? So, how do I place the stamp on my photographs for my customers like Otis Mills does?

]]> By: wondhttp://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-448088 wond Mon, 31 Aug 2009 13:09:19 +0000 http://www.raymond.cc/blog/?p=5743#comment-448088 Nice useful post, Ray. Waiting for a SingMyImage freebie to be posted on this site ;-> Nice useful post, Ray. Waiting for a SingMyImage freebie to be posted on this site ;->

]]> By: Jaxxhttp://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-447812 Jaxx Fri, 28 Aug 2009 19:25:19 +0000 http://www.raymond.cc/blog/?p=5743#comment-447812 Now this is amazing Use a software for usual watermarking....plus this for the invisible watermarking. Now this is amazing
Use a software for usual watermarking….plus this for the invisible watermarking.

]]> By: FKhttp://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-445939 FK Thu, 27 Aug 2009 06:42:04 +0000 http://www.raymond.cc/blog/?p=5743#comment-445939 Ok, easy sample. Lets consider grayscale image that has in the first row 5 pixels with intensity 134,122,155,128,124. Lets consider simple coding schema, that will hide five bits of information to these five pixels: if intensity is odd, the bit of information is set to 1 if is even the bit is 0. We want to encode informatiom 11101 so the intensities are modified to: 135,123,155,128,125. If you print screen and paste it again the intensities remain the same! and the information will be decoded correctly:135 is odd = 1 123 = 1 155 = 1 128 is even = 0 125 is odd = 1and that is the information we hid in the image :-)Filip Ok, easy sample. Lets consider grayscale image that has in the first row 5 pixels with intensity 134,122,155,128,124. Lets consider simple coding schema, that will hide five bits of information to these five pixels: if intensity is odd, the bit of information is set to 1 if is even the bit is 0. We want to encode informatiom 11101 so the intensities are modified to: 135,123,155,128,125. If you print screen and paste it again the intensities remain the same! and the information will be decoded correctly:

135 is odd = 1
123 = 1
155 = 1
128 is even = 0
125 is odd = 1

and that is the information we hid in the image :-)

Filip

]]> By: Andrewhttp://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-445906 Andrew Wed, 26 Aug 2009 21:05:36 +0000 http://www.raymond.cc/blog/?p=5743#comment-445906 I prefer unobtrusive visible watermarks to invisible ones. Please tell me how an invisible watermark can protect you against someone for example pushing PrintScreen, pasting an image into graphics editor and then using your picture as his\her own? That's why I use visible watermarks. I advice to try Bytescout Watermarking - the watermarks it applies are so nice looking that they don't spoil the picture. I usually make watermarks almost transparent - my picture remains nice and becomes protected. I prefer unobtrusive visible watermarks to invisible ones. Please tell me how an invisible watermark can protect you against someone for example pushing PrintScreen, pasting an image into graphics editor and then using your picture as his\her own? That’s why I use visible watermarks. I advice to try Bytescout Watermarking – the watermarks it applies are so nice looking that they don’t spoil the picture. I usually make watermarks almost transparent – my picture remains nice and becomes protected.

]]> By: FKhttp://www.raymond.cc/blog/signmyimage-protects-your-image-with-invisible-signature/#comment-445852 FK Wed, 26 Aug 2009 06:40:03 +0000 http://www.raymond.cc/blog/?p=5743#comment-445852 Hi I found this discussion about SMI, that I created. Just few words. There is no information written to metadata. The information is in the image data directly. If you snap it the signature should be preserved. It of course depends on viewing zoom, crop and jpeg compression. The signature should persist up to 50% zoom, some crop and jpeg upto 60% generally. The signature is removable of course, especially if you have a program that tells you if the signature is there or not. Hi I found this discussion about SMI, that I created. Just few words. There is no information written to metadata. The information is in the image data directly. If you snap it the signature should be preserved. It of course depends on viewing zoom, crop and jpeg compression. The signature should persist up to 50% zoom, some crop and jpeg upto 60% generally. The signature is removable of course, especially if you have a program that tells you if the signature is there or not.

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