What is digital watermark?
Digital watermarking is the process of embedding information into a digital signal in a way that is difficult to remove. The signal may be audio, pictures or video, for example. If the signal is copied, then the information is also carried in the copy. A signal may carry several different watermarks at the same time.
One application of watermarking is in copyright protection systems, which are intended to prevent or deter unauthorized copying of digital media. In this use a copy device retrieves the watermark from the signal before making a copy; the device makes a decision to copy or not depending on the contents of the watermark. Another application is in source tracing. A watermark is embedded into a digital signal at each point of distribution. If a copy of the work is found later, then the watermark can be retrieved from the copy and the source of the distribution is known. This technique has been reportedly used to detect the source of illegally copied movies. [Wikipedia]
Top Online Photo Watermarking
1. Online Photo Watermarking
It is an free online watermark for your photo and images. Add text to your photo to prevent image theft. It’s working on the web, means you do not need photoshop on windows or mac, just upload it here and you get the watermarked image.
PicMarkr lets you to add custom watermark (image or text) to your images online and free. It is useful when you need to protect your copyrights or if you want to add comments to your photos.
WaterMark.ws is a modern tool that allows you to watermark your photos online. The power of this tool outperforms every other downloadable watermark software on the market. It offers features like batch processing, resizing, image compression, text and image watermarking with transparency and organizing your photos just to name a few. No download. No installation!
4. Watermark Tool
Watermark Tool is the powerful online watermarking software that allows you to quickly and easily protect your images with a visible watermark. With the many watermarking options available, you’re able to personalize your images in a variety of ways – including text size, color, and position.
5. Batch Watermark
This is a unique application to batch watermark your images online. You can use this application to batch watermark your images. You can select the font, position and other options from the menu on the left. Watermark multiple images and download them at once. Add nice looking custom watermarks to your images.
6. Web Watermark
Its text stamped anywhere on an image usually used for identity. The text can be your name, a company name, website, etc.
7. Pic Ghost
Edit your images online quickly and easily and also for FREE! With PicGhost you can edit all your images online, no software or installations required. Simply edit your uploaded images by resizing, watermarking and other manipulations.
Do you want to protect your screenshots or photos? Use our Watermark generator! The WaterMark is situated at the corners – randomly -> one time right up, next time left up, etc. Support GIF, JPEG, JPG and PNG extension.
With above websites, you can easily watermarking your photo for free.