A good resolution comparison image:

[RobertR1]

http://gandernook.com/images/irobot_compare.jpg

After it's loaded up zoom in for a better comparison. However zoom in vs out should give you a good idea of how viewing distance has a direct effect on resolution.

Move your chair back n' forth and you'll notice some interesting things

 

[Simon F]

http://gandernook.com/images/irobot_compare.jpg

After it's loaded up zoom in for a better comparison. However zoom in vs out should give you a good idea of how viewing distance has a direct effect on resolution.

Move your chair back n' forth and you'll notice some interesting things

Err!??

If this is trying to simulate the display on a TV which does downscaling from full HDTV resolution to the screen resolution OR where one is moving relative to a fixed-resolution display, then surely the sizes of the DCT artefacts (aka mosquito noise) should be independent of the pixel resolution. In the "low res" image at the top of that set, the dimensions of the noise pixels has been scaled up which is surely incorrect.

 

[fellix]

The better comparison [from a single HDTV source] will be to re-encode the downsampled video part again for every resolution with the proper codec for a given standard format (DVD, TS, H264 and so on) -- it's much more work this way, but it gives fair overview than just plain scaling.

 

[Zaphod]

If this is trying to simulate the display on a TV which does downscaling from full HDTV resolution to the screen resolution OR where one is moving relative to a fixed-resolution display, then surely the sizes of the DCT artefacts (aka mosquito noise) should be independent of the pixel resolution. In the "low res" image at the top of that set, the dimensions of the noise pixels has been scaled up which is surely incorrect.

I thought it was attempting to show how the different sources will look when played back on an upscaling 1080p TV. Not a very exhaustive test at any rate, as the quality of the scaler and post-filtering options of the set have a huge impact on how an upscaled image end up.