SignMyImage 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.
