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2. Aspect ratio (image) - Wikipedia

   en.wikipedia.org/wiki/Aspect_ratio_(image)

   DVD producers can also choose to show even wider ratios such as 1.66:1, 1.75:1, 1.77:1 and 1.78:1 [1] within the 16:9 DVD frame by hard matting or adding black bars within the image itself. The 16:9 aspect ratio was used often in British TVs in the United Kingdom in the 1990s, and is also used in smartphones, laptops, and desktops.

3. Digital photography - Wikipedia

   en.wikipedia.org/wiki/Digital_photography

   For example, a sensor of 2560 × 1600 sensor elements is described as "4 megapixels" (2560 × 1600= 4,096,000). Increasing to 3200 × 2048 increases the pixels in the picture to 6,553,600 (6.5 megapixels), a factor of 1.6, but the pixels per cm in the picture (at the same image size) increases by only 1.25 times.

4. Floppy disk - Wikipedia

   en.wikipedia.org/wiki/Floppy_disk

   Hence, these disks hold 1.47 MB or 1.41 MiB. Usable data capacity is a function of the disk format used, which in turn is determined by the FDD controller and its settings. Differences between such formats can result in capacities ranging from approximately 1,300 to 1,760 KiB (1.80 MB) on a standard 3½-inch high-density floppy (and up to ...

5. Image sensor format - Wikipedia

   en.wikipedia.org/wiki/Image_sensor_format

   The common 1" outside diameter circular video camera tubes have a rectangular photo sensitive area about 16 mm on the diagonal, so a digital sensor with a 16 mm diagonal size is a 1" video tube equivalent. The name of a 1" digital sensor should more accurately be read as "one inch video camera tube equivalent" sensor.

6. Display resolution standards - Wikipedia

   en.wikipedia.org/wiki/Display_resolution_standards

   The 1280 × 1024 resolution is not the standard 4:3 aspect ratio, instead it is a 5:4 aspect ratio (1.25:1 instead of 1. 3:1). A standard 4:3 monitor using this resolution will have rectangular rather than square pixels, meaning that unless the software compensates for this the picture will be distorted, causing circles to appear elliptical.

7. Four Thirds system - Wikipedia

   en.wikipedia.org/wiki/Four_Thirds_system

   The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) design and development. [1] Four Thirds refers to both the size of the image sensor (4/3") as well as the aspect ratio (4:3). The Olympus E-1 was the first Four Thirds DSLR, announced and released in 2003.

8. Wikipedia:Public domain image resources - Wikipedia

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

   Needpix - library of more than 1.5 million free, or so-called Public Domain Photos and Illustrations licensed with CC0. PDPics.com – Public domain photo collection with about 7400 high resolution pictures up to 6000x4000. All images licensed under CC0 license.

9. Liquid-crystal display - Wikipedia

   en.wikipedia.org/wiki/Liquid-crystal_display

   A liquid-crystal display (LCD) in a smartphone Layers of a color TFT LCD. 1: Glass plates. 2+3: Horizontal and vertical polarizers. 4: RGB color mask. 5+6: Horizontal and vertical command lines. 7: polymer layer. 8: spacers. 9: thin film transistors. 10: front electrode. 11: rear electrode.