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2. Wikipedia:Removal of non-free images - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Removal_of_non...

   Yes, permission could be requested prior to the removal of the image. However, many editors don't make requests of users to remove such images because to do so would require the crafting of individual, unique messages in every case where an image is removed. This would be time consuming to say the least.

3. Image editing - Wikipedia

   en.wikipedia.org/wiki/Image_editing

   The background image is used as the bottom layer, and the image with parts to be added are placed in a layer above that. Using an image layer mask , all but the parts to be merged is hidden from the layer, giving the impression that these parts have been added to the background layer.

4. 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.

5. Transparency (graphic) - Wikipedia

   en.wikipedia.org/wiki/Transparency_(graphic)

   GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats. The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible. Only part of a graphic should be ...

6. Primatte chromakey technology - Wikipedia

   en.wikipedia.org/wiki/Primatte_chromakey_technology

   The solid colored background area is removed and replaced with transparency. This allows the user to replace the solid colored background with a background image of their choice. If the foreground object was filmed close to the backing screen or with less than ideal lighting conditions, the foreground object will usually have ‘spill ...

7. Scientists cry foul as Trump admin funding cuts jeopardize ...

   www.aol.com/news/scientists-cry-foul-trump-admin...

   The agency also ruffled staff on Wednesday by telling most remote and telework employees — including those who live more than 50 miles from the nearest EPA office — that they could no longer ...

8. Layers (digital image editing) - Wikipedia

   en.wikipedia.org/wiki/Layers_(digital_image_editing)

   The top layer (the bird) is partially transparent, so the background clearly can be seen through its wing. In this picture the top layer has a drop shadow, a red color overlay of 40%, a gradient overlay from red to yellow of 20% opacity, and a slight bevel effect.

9. Alpha compositing - Wikipedia

   en.wikipedia.org/wiki/Alpha_compositing

   A color spectrum image with an alpha channel that falls off to zero at its base, where it is blended with the background color.. In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full transparency. [1]