Resolution is the number of pixels that an image or screen visually contains.
In computing, the concept of resolution can refer both to images or to a screen or monitor, but in any case it is related to the quality of the image that is reproduced to be perceived by the human eye.
The screen resolution It is defined by the number or quantity that can be displayed in it. This means that the more pixels, the higher the resolution and, therefore, the better image quality. This type of resolution is the product of the relationship between rows (Y) and columns (X) of the monitor.
On the other hand, the image resolution it also refers to the level of detail and definition that can be seen in a digital image. This type of resolution is highly analyzed in digital photography, since both cameras and image capture and reproduction equipment base their quality and price on the level of resolution they provide.
If we have the purpose of knowing what the resolution of our digital camera is, we must have the measurement of pixels in width by height at which an image can be obtained. This calculation will give us a value that is measured in megapixels.
Depending on the use that we want to give the digital capture device, we must take into account its resolution quality.
In addition, on a computer, the resolution of the image also has to do with the formats in which it is found. For example, an image in .jpeg format often has lower resolution and therefore quality, than one in .bmp format. This in turn affects the size and space that the image occupies on the hard drive of the computer.
A larger, higher-resolution image can take up significantly more space than the same image at lower visual quality.