What is the relationship between the pixels of a photo and the resolution?

Resolution and pixel are two different concepts, which are interrelated:

1, the pixel is px, which is the smallest point on the screen. The size of pixels will "change", which is called "relative length". For digital pictures, each color point is called a pixel. A picture consists of 300,000 color points, and the pixel of this picture is 30W. Generally speaking, how many pixels is a camera? This pixel means how many sensors there are in this camera. The camera of 100W sensor is 100W pixel camera, the camera of 4000W sensor is 4000W pixel camera, and so on.

2. Resolution = pixel value on the X axis of the screen * pixel value on the Y axis. If the screen is 1024×768, it means that there are 1024 pixels in the horizontal direction and 768 pixels in the vertical direction.

3. Image resolution refers to the number of pixels per inch of image. Image resolution has a unit called pixels per inch. The higher the resolution, the higher the pixels per inch, and the more realistic the image (which is why high resolution is required when making large-scale ink painting, just to ensure that there are more pixels on every inch of the picture). On the same device, the size of pixels will change with the adjustment of resolution under the condition that the size of the visual picture is unchanged. The lower the resolution, the larger the pixels and the lower the image quality. The lower the resolution, the smaller the pixels and the clearer the picture.