4K image, what is 4K image?

4K, the resolution standard of a new generation of Hollywood blockbusters. It is different from the so-called high-definition TV we watch at home (1080P,1920x1080 resolution) and the big screen of traditional digital cinema (2048x1080 resolution), but it has 4096x2/kloc-. Traditional HDTV has 2.07 million pixels, and traditional digital cinema has 22 1 10,000 pixels. In the 4K cinema, you can see the high-definition picture with 8.85 million pixels.

In the field of digital technology, binary operation is usually used, and the size of a digital image is described by the pixels that make up the image. Because of the huge number of pixels that make up a digital image, it is usually represented by K. The power of 10 is 1024, so:1k = 210 =1024, 2k = 21.

In the application of digital cinema, a 2K image usually consists of 2048× 1080 pixels, where 2048 represents the number of pixels in the horizontal direction and 1080 represents the number of pixels in the vertical direction. The 4K image consists of 4096×2 160 pixels, where 4096 represents the number of pixels in the horizontal direction and 2 160 represents the number of pixels in the vertical direction. In practical digital mastering and digital projection, it is necessary to adjust the number of pixels in the horizontal or vertical direction of the image according to different frame width-height ratios. Therefore, the resolution of 8847360 pixels close to a 4K image can also be called 4K, for example, the common 3840*2 160 in the market can also be called 4K resolution. The standard 4K resolution is exactly four times the pixel of 2048× 1080, and 1006 is the pixel of 1024×540.