SignMyImage provides insertion of an invisible watermark (text) to the photo your sign. The sign is not visible at first sight, but the application can find it and read it. Signed photo is slightly changed on several places comparing to original photo....

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...