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2. Chroma key - Wikipedia

   en.wikipedia.org/wiki/Chroma_key

   The technique has been used in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture, and video game industries. A colour range in the foreground footage is made transparent, allowing separately filmed background footage or a static image to be inserted into the scene.

3. Foreground detection - Wikipedia

   en.wikipedia.org/wiki/Foreground_detection

   Background subtraction is a widely used approach for detecting moving objects in videos from static cameras. The rationale in the approach is that of detecting the moving objects from the difference between the current frame and a reference frame, often called "background image", or "background model".

4. Noise reduction - Wikipedia

   en.wikipedia.org/wiki/Noise_reduction

   They can be used to remove background noise from any audio signal, including magnetic tape recordings and FM radio broadcasts, reducing noise by as much as 10 dB. [26] They can also be used in conjunction with other noise reduction systems, provided that they are used prior to applying DNR to prevent DNR from causing the other noise reduction ...

5. Attach or insert files, images, GIFs and emojis in New AOL Mail

   help.aol.com/articles/attach-files-or-insert...

   Special characters - remove special characters from the title and try again. Unsupported web browser - make sure you're using a supported web browser. Some file types present a security risk - AOL Mail doesn't support some file types, such as .exe, .bat, .jar and others, because they can be used to distribute malware.

6. Settings A-Z - AOL Help

   help.aol.com/settings

   Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

7. Video denoising - Wikipedia

   en.wikipedia.org/wiki/Video_denoising

   Video denoising is the process of removing noise from a video signal. Video denoising methods can be divided into: Video denoising methods can be divided into: Spatial video denoising methods, where image noise reduction is applied to each frame individually.