Why does HTML/css scale images better than Gimp?

[KevinJones]

Say I have a photo that is resolution 2000 x 1500. Now say I put it in a web page, and scale it using css to 600 x 400. NOW, say that I take that same 2000 x 1500 image and scale it down to 600 x 400 using Gimp or even Photoshop. If I take the second image, put it in a web page and display it at its 600 x 400 width, and compare it with the first larger image that was scaled using only css, the second one ALWAYS looks fuzzier. Also, the colors will often also look diminished.

So, my question is, why can't Gimp or Photoshop do as good of a job scaling images as HTML/css can?

[Tas_mania]

Quote:I have a photo that is resolution 2000 x 1500. Now say I put it in a web page, and scale it using css to 600 x 400.

You need the same ratio of height to width for scaling.

            

Maybe CSS/HTML processes fractions differently to Gimp?