About resolution, pixels, and image size

The issue of image resolution is often confusing, especially when you want to resize a pictureGeneral term refers to a single photo or a composite project on the canvas. but also maintain its quality. The information in this overview should help.

Resolution

In general terms, resolution is a measure of how clear or well defined an image is. In digital image terms, resolution refers to the number of pixelsAbbreviation of picture element. Tiny dots on a computer monitor, each displaying a specific color, which collectively make up the images displayed on the screen. per linear inch or centimeter in the image. Because each pixel contains information about the image, the greater the number of pixels in an inch or centimeter means the greater the amount of picture information in that same space. This is why high-resolution pictures look better than low-resolution pictures.

Pixels

Although image resolution has a set value of pixels per linear inch (or centimeter), pixels themselves vary in size, depending on the resolution of the picture. For instance, if you increase the resolution of a picture from 72 ppi (pixels per inch) to 150 ppi, you are forcing almost twice as many pixels to fit in the same space, and they become smaller in size to do so. This increases the fineness of the picture. Decreasing the resolution leads to larger pixels.

Image size

Image size is a result of the total number of pixels in a picture and the resolution of the picture. As you increase or decrease the resolution, the image size (the physical height and width, not the file size) changes in inverse proportion. For example, if you start with a total of 10,000 pixels, and change the resolution from 150 ppi to 300 ppi, you are squeezing the same number of pixels into half the space, so the image size decreases. But the quality of the image increases because there is now more information in the same space.