When purchasing cameras, many people have a headache! 1080p resolution? 720p resolution? 2 megapixel? 3 megapixels? Do you have a question mark on the face of a pile of product parameters. What is the difference between pixel and resolution? What does it matter? Now let’s take a look at the pixel and resolution, and the relationship between them.
1. Concept of pixel and resolution
01. Pixel: the unit of quantity (Pixel, abbreviation: px). Each picture is composed of many color dots, and each color dot is called a pixel. We often say 100W, 130W and 200W pixel cameras, that is, the number of light sensors corresponding to them. A picture is composed of 300000 color dots, and the pixel of this picture is 30W.
02. Resolution: divided into image resolution and screen resolution. The camera resolution we usually refer to is the image resolution.
● Image resolution: Image resolution refers to the number of pixels in an image per inch. Image resolution has units, called pixels per inch (PPI). The higher the resolution, the higher the pixel point density, and the clearer, more delicate and realistic the image.
● Screen resolution: The screen resolution is the number of pixels in each row of the screen * the number of pixels in each column. Each screen has its own resolution. The higher the screen resolution is, the more colors are presented and the higher the definition is.
2. The relationship between pixels and image resolution
Formula: Pixel=Inch * PPI
When the pixels are the same, the size of the left image is small, there are many pixels in the unit area, the resolution is larger, and the image looks clearer. This is why the larger the size of the same picture, the more blurred the picture.
For images of the same size, the device with higher pixels is used in the left image, which has more pixels per unit area, larger resolution, and clearer image. This is why in the same scene, the 500W camera presents a clearer picture than the 200W camera.
Summary
★ The higher the resolution of the image, the clearer the image looks;
★ The resolution of the image depends on the pixel and size of the image. The image with high pixel and small size has large resolution and looks clearer;
★ The higher the pixel of the image, it does not mean that the picture is clearer, but under the same definition (resolution) requirements, it can display a larger size picture.
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