What is the difference between resolution and pixels?

To put it simply, what we usually call pixels, is the number of photoelectric sensing elements on CCD CMOS, an image sensor through light sensitivity, photoelectric signal conversion, AD conversion and other steps, in the output of the ** to form a point, if we magnify the image several times, we will find that these continuous tones are actually composed of many small square points with similar colors, these small square points are the smallest unit of the image "pixel" (pixel).

Pixels are divided into CCD pixels and effective pixels, and most of the digital cameras on the market today are marked with CCD pixels rather than effective pixels.

2 What is Resolution?

When it comes to pixels, we have to talk about resolution. Because the two are inextricably linked!

"Resolution" refers to the number of pixels expressed or captured per unit length. Like pixels, there are many types of resolutions.

One of the most common is the image resolution, we usually say that the maximum resolution of the digital camera output, refers to the image resolution, 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 equipment, and the unit is dpi (dot per inch).

Display resolution is the size of the Windows desktop. The most common settings are 640x x x768....Wait. Screen font resolution: The font resolution of PC is 96dpi, and the font resolution of Mac is 72dpi.

3 Relationship between image resolution and pixels.

Now that we've got the definitions of pixels and resolution, let's take a look at the relationship between the two. Attentive friends may have discovered that pixels and resolution are directly proportional, and the larger the pixels, the higher the resolution. Let's take an example!

As mentioned earlier, pixels are divided into effective pixels and CCD pixels.

Generally speaking, the maximum image resolution of a 2 million pixel digital camera is 1600 1200 1.92 million pixels, that is, the actual effective pixels are 1.92 million.

The maximum image resolution of a 3 million pixel digital camera is 2048 1536 3145728 pixels, which means that the effective pixels are 3.14 million.

The same is true for other pixel-level digital cameras, whose resolution and effective pixel conversion.

As you can see, the higher the pixel, the higher the maximum output image resolution.

It's all about describing how many points can be displayed.

For example, if the resolution is 800x600, it means that there are 600 horizontal lines, each with 800 points.

And it can be said that the unit of resolution is the pixel.

For example, with a resolution of 800x600, there are 800 horizontal pixels and 600 vertical pixels, and the total number of pixels is 800x600 = 480,000 pixels.

The higher the resolution, the larger the pixels and the sharper the image.

Conversely, the lower the resolution, the smaller the pixels, and the blurrier the image.

Resolution refers to the screen.

The pixel refers to the camera.

The pixel is equal to the resolution multiplied by the size, the higher the pixel is, the smaller the size, the higher the resolution, and the higher the resolution of the image, the clearer it looks.

Resolution and pixels are two different concepts, but they have a certain connection and correlation.

Pixel, or px, is the smallest dot on the screen. The size of a pixel is "variable", also known as "relative length". For digital**, each dot is called a pixel. A ** is composed of 300,000 color dots, and the pixel of this ** is 30W.

Usually it is said how many pixels the camera has, this pixel is how many sensors there are in the camera, a camera with 100w sensors is a 100w pixel camera, a camera with 4000w sensors is 4000w pixels, and so on.

Resolution = pixel value on the x-axis of the screen * pixel value on the y-axis. If the screen is 1024 768, that is, there are 1024 pixels in the horizontal direction and 768 pixels in the vertical direction.

1. Pixel refers to the number of points (indicating how many points ** is made of), and resolution refers to the density of pixels (it is the number of pixels in the unit size, generally expressed by the number of points per inch - dpi).

**Actual size is determined by pixels. A pixel is very large, and if the resolution is set to be large, the printed ** may not be large (but it is clear). Conversely, if you set the resolution to a very small resolution, the print may be large (but not sharp).

2. Resolution refers to the pixel value per unit length, which is related to the printing quality, and the general dimension used is ppi; The total pixel refers to the sample accuracy of **, which is related to the printable size, and is usually expressed in the way of "length and width", and the product is usually called the total pixel. Due to the different aspect ratios of **, the same total pixel can have multiple specifications.

Resolution is the precision of the screen image.

It refers to the number of dots that can be displayed on the display. Since the dots, lines, and surfaces on the screen are composed of points, the more dots the display can display, the more detailed the picture will be, and the more information can be displayed in the same screen area, so resolution is one of the most important performance indicators. Think of the image as a large chessboard, and the resolution is expressed as the number of intersections of all the meridian and latitude lines.

For a screen with a resolution of 1024 768, that is, each horizontal line contains 1024 pixels, with a total of 768 lines, that is, the number of scanned columns is 1024 columns, and the number of rows is 768. Resolution is not only related to the display size, but also affected by factors such as CRT point spacing, bandwidth, etc. Among them,It is closely related to the refresh rate,Strictly speaking,Only when the refresh rate is"Flicker-free refresh rate",How much resolution can the display reach,How much can the highest resolution of this display become。

Resolution is an important concept related to images, and it is a technical parameter to measure the expressiveness of image details. But there are many types of resolution, and their meanings vary. It is crucial to understand what resolution means in each context and to understand the interrelationship between different representations.

Some users tend to confuse resolution and point spacing, but these are two very different concepts. Resolution refers to the distance between pixel points, the number of pixels.

The more it is, the higher its resolution, so the resolution is usually measured in pixels, e.g. 640 480, which has a pixel number of 307200.

Note: 640 is the horizontal pixel number and 480 is the vertical pixel number.

Since in the graphics environment, high resolution can effectively shrink the screen image, therefore, in the screen size.

In the case of constant condition, its resolution cannot exceed its maximum reasonable limit, otherwise, it loses its meaning.

Pixels and resolution are two important concepts that are inseparable, and the way they are combined determines the amount of data in an image, and the higher the resolution of an image of the same size, the more pixels it contains.

A one-inch square image contains 5,184 pixels at a resolution of 72 and 90,000 pixels at a resolution of 300. A high-resolution image contains more pixels than a lower-resolution image, so the pixels will be smaller and the density of pixels will be higher.