Invisible Watermarking - Description

SignMyImage is an application that is translated to: : English, French, Czech, Slovak, German, Russian, Dutch, Italian, Polish, Spanish, Simplified/Traditional Chinese, Portuguese, Bulgarian, Norwegian, Swedish, Bosanski, Hrvatski, Crnogorski, Srpski, Korean, Danish, Magyar, Arabic, Romanian, Afrikaas, Macedonian, Indonesian and Thai.

This application allows you to sign your images. The sign is added directly to the image data. It doesn't use EXIF or stream file properties. The sign is invisible. The sign stays detectable after jpeg compression, scaling and cropping or for example PrintScreen&Paste. We employ an Image Spider which crawls the Internet looking for signed images. If it finds your signed image, it will let you know.

We can sign 3x8 bits(24 bit) bmp,png,jpg,tif images and detect signature from images and PDF files as well.

Now the SignMyImage is implemented as a plugin for Photoshop, standalone application with GUI and as a command-line program.

Using SignMyImage

Image Signing Step 1Step 2Step 3Step 4

1. step - Open the image using drag&drop or the press the open icon on the toolbar. Press the icon for signing current image. 2. steps - Enter the signature (letters, capitals, numbers, dashes) and press OK. 3. step - Wait till the signing is finished. 4. step - Save the result.

Sign Detection Step 1Step 2

1. step - Open the image using drag&drop or the press the open icon on the toolbar. Press the icon for sign detection. 2. steps - Wait till the sign detecion finishes and check the result.

From the world of science: There are currently at least two regular international conferences on the topic of image watermarking. Why is this topic still significant? It is a big challenge for scientists to develop an invisible watermark that can persist through common attacks such as scaling(assymetric), cropping, jpeg compression, denoising, rotation, shearing, blurring, sharpening, contrast and brightness changes. While seemingly impossible scientists keep trying to make advances in this technology. All progress no matter how small is reported at these conferences. Their efforts began in 1994 when R.G.van Schyndel published the first really important article at the iEEE internation conference.

Signature properties

If you want to find out more about SMI signature properties and signature durability to jpeg compression, cropping and scaling, click here.