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Typical image degradations are JPEG compression, rotation, cropping, additive noise, and quantization. [6] For video content, temporal modifications and MPEG compression often are added to this list. A digital watermark is called imperceptible if the watermarked content is perceptually equivalent to the original, unwatermarked content. [ 7 ]
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File:The Watermark in Honolulu, HI.jpg. Add languages. ... MIME type: image/jpeg) This is a file from the Wikimedia Commons.
Once you've composed your message, place the cursor where you'd like to insert an image. Click the Image icon. - Your computer's file manager will open. Find and select the image file you'd like to insert. Alternatively, you may drag and drop an image from your computer directly into the body of the message.
The procedure for adding images to articles is the same, regardless of whether the image was uploaded to Commons or directly to English Wikipedia. To make your uploaded file appear in an article, you need to insert it: edit the article and add the syntax [[File:Image name|thumb|Caption]] where you want the file to appear.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Upload an image that you own now. This is how you add an image into Wikipedia: Click here to create an account on Wikimedia Commons automatically, where Wikipedia's images are stored.
JPEG files should not use arithmetic coding due to limited browser support. Please prefer Huffman coding for JPEG files instead. Avoid images that mix photographic and iconic content. Though CSS makes it easy to use a PNG overlay on top of a JPEG image, the Wikipedia software does not allow such a technique. Thus, both parts must be in the same ...