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The iPhone XR (stylized and marketed as iPhone Xʀ; [18] Roman numeral "X" pronounced as "ten" [19]) is a smartphone designed, developed, and marketed by Apple Inc. It is part of the twelfth generation of the iPhone, alongside the higher-end iPhone XS/XS Max models. Pre-orders began on October 19, 2018, with the official release on October 26 ...
The iPhone has a minimal hardware user interface, with most models featuring five buttons. The only physical menu button is situated directly below the display and is called the "Home button" because its primary function is to close the active app and navigates to the home screen of the interface. Earlier models included a rounded square ...
The displays are manufactured worldwide by different suppliers. Currently, the iPad's display comes from Samsung, [12] while the MacBook Pro and iPod Touch displays are made by LG Display [13] and Japan Display Inc. [14] There was a shift of display technology from twisted nematic (TN) liquid-crystal displays (LCDs) to in-plane switching (IPS) LCDs starting with the iPhone 4 models in June 2010.
The XS, which is visually near-identical to the iPhone X, has a better system-on-a-chip: the A12 Bionic chip built with a 7 nm process. [20] It has a 5.85 inch (149 mm) OLED display (marketed as 5.8 inch) with a resolution of 2436 × 1125 pixels (2.7 megapixels) at 458 ppi, dual 12-megapixel rear cameras, and one 7-megapixel front-facing camera.
The iPhone 11 has a 6.1-inch (15 cm) IPS LCD with a resolution of 1792 × 828 pixels (1.4 megapixels) at a pixel density of 326 PPI with a maximum brightness of 625 nits and a 1400:1 contrast ratio and it is equivalent to the iPhone XR. It supports Dolby Vision, HDR10, True-Tone, and a wide color gamut.
However, even if both techniques have inherent noise, it is widely appreciated that for color, digital photography has much less noise/grain than film at equivalent sensitivity, leading to an edge in image quality. [10] For black-and-white photography, grain takes a more positive role in image quality, and such comparisons are less valid.
Scanners and cameras. "PPI" or "pixel density" may also describe image scanner resolution. In this context, PPI is synonymous with samples per inch. In digital photography, pixel density is the number of pixels divided by the area of the sensor. A typical DSLR, circa 2013, has 1–6.2 MP/cm 2; a typical compact has 20–70 MP/cm 2.
An image that is 2048 pixels in width and 1536 pixels in height has a total of 2048×1536 = 3,145,728 pixels or 3.1 megapixels. One could refer to it as 2048 by 1536 or a 3.1-megapixel image. The image would be a very low quality image (72ppi) if printed at about 28.5 inches wide, but a very good quality (300ppi) image if printed at about 7 ...
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