> > John, (or Rob or anyone...) > This may be a stupid question, but is the relationship between lp/mm and > sensors as straightforward as "two adjacent sensors equal to one line pair, > irrespective of sensor colour"?
Not quite, because the sensor colour does enter into it. But if your stimulus pattern is black-and-white lines, two sensors do equal one line pair, pretty much, if the interpolation is done based just on intensity. If, however, the stimulus is black-and-red (or black- and-blue) lines, you only get half the spatial resolution, so you need four sensors to get a distinguishable line pair. Black-and-green falls somewhere in between. In real life, of course, most patterns are lower-contrast than all black/all white, so deliver lower than theoretical maximum resolution. But they tend to be closer to black-and- white than to single-sensor colours, so the right limit to use is the two-sensor-per-line-pair number. It all depends on the input colours, the contrast ratio, and most of all on the quality of the image reconstruction algorithms (commonly referred to as Bayer interpolation).
