1280*720 is 921600 pixels. Each horizontal line of the output image contains 1280 pixels, with a total of 720 lines, that is, the number of scanned columns is 1280. , the number of rows is 720, referred to as 720P.
Pixel, the full name in Chinese is image element.
By definition, pixel refers to the basic encoding of basic original pigments and their grayscales. Pixel is the basic unit that constitutes a digital image. The size of the image resolution is usually expressed in pixels per inch (PPI).
For example, 300x300PPI resolution means that the number of pixels per inch in the horizontal and vertical directions is 300, which can also be expressed as 90,000 (300x300) pixels in one square inch.
Just like photographic photos, digital images also have continuous shades and shades. If you enlarge the image several times, you will find that these continuous shades are actually composed of many small square dots of similar colors. These small Square dots are the smallest units that make up an image - pixels. The smallest graphic unit displayed on the screen is usually a single stained dot. The higher the pixel, the richer the color palette it has, and the more realistic the color can be expressed.
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