Shulou(Shulou.com)06/02 Report--

Editor to share with you the difference between watermarked and unwatermarked pictures in the computer. I hope you will gain something after reading this article. Let's discuss it together.

The difference between watermarked and unwatermarked: 1, the appreciation is different, the picture with watermark will cause some interference to the picture information, but the picture without watermark has better viewing effect; 2, the quality is different; 3, the purpose is different.

The difference between watermarked and unwatermarked:

The main results are as follows: 1. The appreciation is different.

Watermarked pictures (films) generally cause some interference to the picture information, which is difficult to make people feel appreciated.

The unwatermarked picture (film) can express the content completely, without the occlusion of external text, the viewing effect is better.

2. The quality is different.

Watermarked pictures are generally printed with their own original (or copyright) marks, which make it difficult for people to steal, so that such pictures can have more official authority and better protect the integrity of the picture.

Unwatermarked pictures are easy to be used at will, and as time goes by, the quality of the pictures will be reduced.

3. Different purposes.

Watermarked pictures are generally used officially, and watermarks should provide complete and reliable evidence for the ownership of copyrighted information products.

The "destination" of unwatermarked pictures is generally circulated on the Internet, which can be used and modified.

Extended data:

First, the concept of watermark:

The so-called (digital) watermarking is to add some digital information to the data multimedia (such as image, sound, video signal, etc.) to achieve the functions of file authenticity identification, copyright protection and so on. The embedded watermark information is hidden in the host file and does not affect the observability and integrity of the original file.

Second, the basic features of pictures and films with watermarks are:

1. Provability

The watermark should provide complete and reliable evidence for the ownership of copyrighted information products. The watermarking algorithm identifies the relevant information of the owner embedded in the protected object (such as registered user number, product logo or meaningful text, etc.) and can extract it when needed. A good watermarking algorithm should be able to provide a completely uncontroversial copyright certificate, and a lot of work needs to be done in this regard.

2. Imperceptibility

Imperceptibility contains two meanings, one refers to the visual invisibility, that is, the change of the image caused by embedding the watermark should be imperceptible to the visual system of the observer. ideally, the watermark image is visually identical to the original image, which is the requirement of most watermarking algorithms.

3. Robustness

Robustness is very important for watermarking. Robustness is a technical term, which simply means that a digital watermark should be able to withstand a large number of different physical and geometric distortions, including intentional (such as malicious attacks) or unintentional (such as image compression, scanning and copying, noise pollution, size changes, etc.). After these operations, the robust watermarking algorithm should still be able to extract the embedded watermark from the watermark image or prove the existence of the watermark.

After reading this article, I believe you have a certain understanding of "what is the difference between watermarked and unwatermarked pictures in the computer". If you want to know more about it, welcome to follow the industry information channel, thank you for your reading!

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