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2. Transparency (graphic) - Wikipedia

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

   The edges of characters and other images with transparent background should not have shades of gray: these are normally used for intermediate colors between the color of the letter/image and that of the background, typically shades of gray being intermediate between a black letter and a white background. However, with, for example, a red ...

3. File:Windows Spotlight on Windows 11 with black background.png

   en.wikipedia.org/wiki/File:Windows_Spotlight_on...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Pages for logged out editors learn more

4. Autostereogram - Wikipedia

   en.wikipedia.org/wiki/Autostereogram

   If the virtual 3D objects reconstructed by the autostereogram viewer's brain were real objects, a second viewer observing the scene from the side would see these objects floating in the air above the background image. The 3D effects in the example autostereogram are created by repeating the tiger rider icons every 140 pixels on the background ...

5. McCollough effect - Wikipedia

   en.wikipedia.org/wiki/McCollough_effect

   A second induction image for the McCollough effect. Stare at the center of this image for a few seconds, then at the center of the image to the left (with the red background) for a few seconds. Then return to this image. Keep looking between the two colored images for at least three minutes. A test image for the McCollough effect. On first ...

6. White's illusion - Wikipedia

   en.wikipedia.org/wiki/White's_illusion

   Example of White's illusion. White's illusion is a brightness illusion in which certain stripes of a black-and-white grating are replaced by gray rectangles (see the figure). Both of the gray bars of A and B have the same color, luminance, and opacity. The brightness of the gray rectangles appears to be closer to the brightness of the top and ...

7. Binary image - Wikipedia

   en.wikipedia.org/wiki/Binary_image

   A binary image is a digital image that consists of pixels that can have one of exactly two colors, usually black and white. Each pixel is stored as a single bit — i.e. either a 0 or 1. A binary image can be stored in memory as a bitmap : a packed array of bits.

8. See-through display - Wikipedia

   en.wikipedia.org/wiki/See-through_display

   Unlike transparent LCDs and OLEDs that requires integrated electronic modules to process visual signals or emit their own light, a passive transparent display uses a projector as the external light source to project images and videos onto a transparent medium embedded with resonance nanoparticles that selectively scatter the projected light. [21]

9. Optical illusion - Wikipedia

   en.wikipedia.org/wiki/Optical_illusion

   In addition to the gestalt principles of perception, water-color illusions contribute to the formation of optical illusions. Water-color illusions consist of object-hole effects and coloration. Object-hole effects occur when boundaries are prominent where there is a figure and background with a hole that is 3D volumetric in appearance.