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  2. Wikipedia:Public domain image resources - Wikipedia

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

    Bing.com – Has an Advanced Image Search that offers images in different resolutions and also categorizes images. Allows free querying of the bing Image Search API up to a certain limit per day. Everystockphoto.com – Searching over 4.3 million public domain and creative commons photos including Wikipedia and NASA. Free user accounts with ...

  3. Mipmap - Wikipedia

    en.wikipedia.org/wiki/Mipmap

    A high-resolution mipmap image is used for high-density samples, such as for objects close to the camera; lower-resolution images are used as the object appears farther away. This is a more efficient way of downscaling a texture than sampling all texels in the original texture that would contribute to a screen pixel ; it is faster to take a ...

  4. Selected area diffraction - Wikipedia

    en.wikipedia.org/wiki/Selected_area_diffraction

    SAD is important in direct imaging for instance when orienting the sample for high resolution microscopy or setting up dark-field imaging conditions. High-resolution electron microscope images can be transformed into an artificial diffraction pattern using Fourier transform. Then, they can be processed the same way as real diffractograms ...

  5. Texture mapping - Wikipedia

    en.wikipedia.org/wiki/Texture_mapping

    A texture map [5] [6] is an image applied (mapped) to the surface of a shape or polygon. [7] This may be a bitmap image or a procedural texture.They may be stored in common image file formats, referenced by 3D model formats or material definitions, and assembled into resource bundles.

  6. Schlieren photography - Wikipedia

    en.wikipedia.org/wiki/Schlieren_photography

    Background-oriented schlieren technique (BOS [7]) relies on measuring or visualizing shifts in focused images. In these techniques, the background and the schlieren object (the distortion to be visualized) are both in focus and the distortion is detected because it moves part of the background image relative to its original position.

  7. 11 must-see astronomy events in 2025 - AOL

    www.aol.com/11-must-see-astronomy-events...

    The duo will appear high in the southwestern sky after nightfall and will gradually slip down toward the horizon before setting around 9 p.m., local time. An encore will be visible the following ...

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