What are pixels and resolution

Pixel refers to the smallest unit in an image represented by a sequence of numbers; pixel refers to a number of small squares in the image, which have a clear position and are assigned The color value, and the combination of the color and position of these small squares determines the appearance of the image. Resolution refers to the number of pixels expressed in unit length, which determines the fineness of bitmap image details; resolution can be subdivided into display resolution, image resolution, printing resolution, scanning resolution, etc.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What is a pixel?

Pixel refers to the smallest unit in an image represented by a sequence of numbers.

Pixels are composed of many small squares in the image. These small squares have a clear position and assigned color value, and the colors and positions of these small squares are combined together. Determines how the image appears. A pixel is an indivisible unit or element in the entire image.

This may be too abstract. In fact, you can think of pixels as the smallest stained points in the image that cannot be further divided. In the image, each pixel has a clear position and The assigned color value.

A more vivid metaphor, for example, "Minecraft" is a pixel game. The characters and buildings in it are made of small squares. These small squares can be regarded as pixels;

A map composed of small squares. Each small square can be regarded as a pixel in the map.

What is resolution?

When it comes to pixels, we have to talk about resolution. Because the two are inseparable! The so-called "resolution" refers to the number of pixels expressed or captured per unit length. Like pixels, there are many types of resolutions.

Resolution, also known as resolution and resolution, can be subdivided into display resolution, image resolution, printing resolution and scanning resolution.

The most common one is image resolution. The maximum resolution of photos output by a digital camera usually refers to the image resolution, and the unit is ppi (Pixel per Inch).

Printing resolution is also a very common one. As the name suggests, it is the output resolution of the printer or printing device, and the unit is dpi (dot per inch).

Monitor resolution is the size of the Windows desktop. Common settings are 640x480, 800x600, 1024x768...etc. Screen font resolution: PC font resolution is 96dpi, Mac font resolution is 72dpi.

What is the relationship between image resolution and pixels

1. Pixels refer to the number of points in a photo (indicating how many points the photo is composed of) , Resolution refers to the density of photo pixels (in pixels per unit size, generally expressed in dots per inch - dpi).

The actual size of the photo is determined by pixels. For a photo with large pixels, if the resolution is set to a large value, the printed photo may not be large (but very clear). On the contrary, if the resolution of a photo with not very large pixels is set to a small value, the printed photo may be very large (but not clear).

2. Resolution refers to the pixel value per unit length, which is related to the print quality. The generally used dimension is PPI; the total pixels refers to the sample accuracy of the image, which is related to the printable size. Usually, "length × "width", the product is what is commonly referred to as the total pixels. Because the aspect ratio of the picture is different, the same total pixels can have multiple specifications.

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