In recent years, 4K and 8K ultra-high-definition can be described as popular, and they even appeared in the 2020 CCTV Spring Festival Gala. This article bulk sms service will briefly introduce what resolution is, the innovations, difficulties and prospects of 4k/8k. Resolution and Pixels Resolution, also known as resolution, is used to measure the precision of the image quality of printed matter, displays, etc. The higher the resolution, the clearer the image quality, and the lower the resolution, the more blurred the image quality. There are generally two ways to describe resolution: Total number of pixels per unit area total number of pixels pixel Here is a new word " pixel ", which is pixel in English, for short. Pixels are the smallest squares that make up a graphic. These small squares have a clear bulk sms service position and assigned color values. The small squares at each position display a different color, which determines the appearance of the image.
Carefully observe your mobile phone, TV, and computer screen, you can see a small light-emitting point, which is what we call a pixel point. If you look at it bulk sms service with a magnifying glass, you can also see the red, green and blue light-emitting elements that make up each pixel. For monitors, printers, etc., devices with actual output size can use pixels per unit area to represent resolution. Common units are DPI and PPI. They are a bit different, but the difference in essence is not big. DPI: Dots Per Inch, dots per inch, generally used to measure the accuracy of printers, mice, etc. PPI: Pixels Per Inch, pixels per inch, generally used to measure the resolution of the display Inch is inch, 1 inch = 2.54 cm, bulk sms service where each inch refers to the length of the diagonal. Calculation formula: resolution=(√(horizontal resolution^2+vertical resolution^2))/screen size Apple introduced the concept of "Retina Display" on the iPhone 4.
The diagonal length of the iPhone 4 screen is 3.5 inches, and a total of 960 × 640 pixels are integrated. Apple considers this resolution as the average bulk sms service human eye cannot perceive the existence of pixels. You must know that at that time, the resolution of most computer screens and mobile phone screens was 72 PPI! The resolution of the screen device is good to measure, but when you take a photo and view a picture or emoticon sent to you on the computer, this kind of image without "real size", you need to use another one. It is also the most familiar way of measuring resolution, that is, only looking at the total number of pixels in the picture. The main mobile phone with high bulk sms service camera pixels If you want to know the resolution of a picture, you can click the picture file on the computer-right-click-properties-details, you can find the resolution in it. Now we know that in a certain area,