Originally Posted by chuckman
If you shot a scene with two cameras--one native 1080, one native 768--then you compared the signals on two screens side-by-side,
This test doesn't make sense since the camera lens has a different focal length, and the optical system has a different resolving power than the eye. More, you would get artifacting because the pixel grid frequency is too close to the number of lines of resolution in the sensor. None of that would be apparent in the eyeball, which has a far higher density of photosites. You would have to at least double the resolution of the source on the camera to capture it without adding artifacts in the camera.
This panel has a very good scaler, but there is no way it can scale to the point that you couldn't see a difference from down-converted 1080p and a native 768p source--I would easily believe that you could detect a 'better' picture on the 5010 at a farther distance because it doesn't have to scale anything.
Now...THIS is the real difference. Not SDE, not pixel grid...but scaling. I have noticed the rare scaling artifact on high frequency lines that can be visible at over 8ft...but it is VERY rare.
Of course, if you are watching cable you are looking at 1080i or 720p for HD...and you will be for some time...then you are getting a form of scaling on both sets. More, when you are watching 1080i and most 1080p video content, the camera that shot the image does not resolve a full 1080 lines of detail from the lens/sensor combination.
And Upsampling has its share of drawbacks as well. Just look at upsampled SD vs. native SD on a CRT.
The bottom line? Scaling artifacts will happen on 1080p sets as well and are are not the monopoly of 768p sets.
Then there's the SDE. Now I'm no expert, but anyone who's taken physics knows that weird things happen to light when patterns are applied
I have a degree in applied physics and a degree in physics education. I'm not sure what you are referring to.
Scaling artifacts may be visble...pixel grid and SDE will vanish at the point of extinction for the lens/retina combination for the eye in question.
I know something about imaging, and you can't possibly convince me that a sensor that replicates the human eye would see absolutely no difference at the discussed distances.
You would have to build a sensor/lens combination with ~100MP of resolution. The colour resolution is not the same as the rod cell resolution...nor is it as sensitive.
We don't have to do all that. Stand in front of a 768p set with a test pattern...walk back until the point where the grid vanishes...you have found the point of extinction for that size dot for your eye.
Imagine looking through two different sized screens--there is definitely a distance where you can't see either squares any more, but what you see through each screen will look slightly different because of the different sized squares (i.e. the way the different screens interfere with the image you're trying to see).
Yes, but this is not a comparable physical effect with these displays. In this case the spatial frequency of the screen door will create variable artifacting based on hole size. It is different because you are looking through at an image with far greater detail. In other words, the edge of an object through an actual screen door can partially cut through an individual hole on the screen. This is not possible for pixels. IOW, really big screen door holes would actually pass a more detailed image than the really small ones...which demonstrates the problem with your analogy.
Again, scaling creates the artifact. SDE is merely the visibility of the grid of pixels...inapropriately named after the effect seen through actual screen doors.
If anyone believes a 1080p is the better buy because there is not any scaling...then they are mistaken as well. This would only be true for PC sources...not the vast majority of video sources...including many that are called '1080p'.
I would suggest that for now 768p is a much better choice. Once imaging catches up and we are getting much higher resolution in our media in a few years then it might be a good time to take a look at a zero black level set with higher resolution...and bank $2000 you save today on the 5010 to that end.