Without overly making complex things, the resolution is what you see on screen or in print. On display, you see pixels of light and in print, you see dots of ink. This is where the terms PPI (pixels per inch) and DPI (dots per inch) come from. In an oversimplification, you can think about them as the exact same thing; however, dots describe pixels and print are a digital display. Many people mistakenly talk about DPI on screen, this is wrong, but now you will understand what they imply. DPI, as well as PPI, is both a way to define resolution.

You have actually listened to the terms hi-resolution, or low-resolution, or low-res. This implies exactly how thick the pixels (or dots) are. More density = more resolution, or information. If there is an inadequate resolution (photo isn’t sufficiently large) then you will see an obvious soft quality to the photo, or perhaps pixelization. Too much resolution, won’t impact the picture show high quality, you will simply have a needlessly big file.

Resizing a Photo and Photoshop Interpolation

When you alter the size of the picture, Photoshop has to recreate the pixels.

There were originally 3 kinds of interpolation in Photoshop:

  • Nearest neighbor: Consider this as to take a look at the nearest pixel and match their tome and color.
  • Bi-linear: Consider this as taking a look at the four bordering pixels as well as locating the standard.
  • Bi-Cubic: Like taking a look at the sixteen bordering pixels and discovering a standard. But providing more weight to the eight closest pixels.

Commonly bi-linear is best for line art and basic graphics, where bi-cubic is finest for pictures and graphics containing gradients, however, wait, it does not stop right here.

Adobe added two more sorts of bi-cubic (In Photoshop CS3). They added:

  • Bicubic Smoother: Smoothens out a developed in enlargements
  • Bicubic sharper: Develops to restore lost information at the time of reducing a file

If you are keen on knowing how to resize photos, you can follow the given link.