How are line pairs and pixels related in image resolution?

1. How are pixels and resolution related?
2. What is line pair resolution?
3. What is the relationship between pixel size and spatial resolution?
4. How do you convert pixels to line pairs per millimeter?

How are pixels and resolution related?

The size of the pixel is related to the resolution of the total picture. The larger the pixel size the lower the resolution and the smaller the pixel size the higher the resolution.

What is line pair resolution?

Spatial resolution is quantified in the number of line pairs that can be distinguised per millimeter (lp/mm). A line pair consists of a dark line and a bright line. So if one line is 5 microns wide, then a line pair will be 10 microns wide and there would be 1 mm/10 microns = 100 line pairs per millimeter.

What is the relationship between pixel size and spatial resolution?

Spatial resolution refers to the dimension of the pixel size representing the area covered on the ground. For example, if the area covered by a pixel is 5 x 5 meters, the resolution is 5 meters. The higher the resolution of an image, the smaller the pixel size and the greater the detail. This is the opposite of scale.

How do you convert pixels to line pairs per millimeter?

For monochrome applications the pixel size is multiplied by factor 1.41 (=square root of two). The result is the diagonal of the pixel. For color applications you can generally use factor 2. The result is 1000 / ( pixel size * factor) for the value “lines per millimeter”.