What Is Image Resolution?

Image resolution refers to the amount of information stored in an image. It is the number of pixels in an image per inch. The unit of resolution is PPI (Pixels Per Inch), which is usually called pixels per inch. Image resolution is generally used in ps to change the sharpness of the image.

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Image resolution principle

There are two main types of digital images, one is vector graphics, also called vector graphics; the other is bitmap, also called bitmaps. The vector illustration is relatively simple. It is created by a large number of mathematical equations, and its graphics are composed of lines and block faces filled with colors instead of pixels. Enlarging and reducing such graphics will not cause graphics distortion.

Bitmaps are complex.

The expression of image resolution is also horizontal pixels × vertical pixels , and can also be expressed by a specification code.

It should be noted, however, that image resolution is called differently in different books and even in different places in the same book. In addition to image resolution, it can also be called image size, image size, pixel size, and recording resolution. Here, the terms "size" and "size" have dual meanings. They can both refer to the number of pixels (the number of pixels) and the size of the screen (the size of the sides or the area), so it is easy to cause misunderstanding. In the case of the same display resolution, the higher the resolution, the more pixels there are, and the larger the size and area of the image. Therefore, someone often uses the image size and image size to represent the resolution of the image.