I know for a fact that LR uses a form of AHDD. DPP tends to produce sharper results, however it is more susceptible to aliasing. LR tends to produce really clean edges, but it also produces slightly softer results.
Hmm I've actually found that I can get more detail out of ACR than DPP (although I haven't used DPP since the convolution stuff, but barely at all) and ACR seems prone to created stair-stepped fine lines from some lenses.
ACR seems to be much more prone to color moire aliasing than DPP, but DPP seems to be much more prone to zipper artifacts. ACR is also prone to severe stair-stepping jaggies at times and it can be really bad at timed with say orange leaves against a blue sky. C1 avoid the stair-steps but seems prone to dotted line type artifacts (where a solid, fine line may turn into a dotted line or a line with spurious stray pixels hanging off or certain solid patterns turn into randomly dotted checkerboards). Each definitely has some issues.
I'm not saying that ACR can't get more detail...just that it's not quite as intrinsically sharp as DPP (without any adjustments beyond simply demosaicing.) The aliasing issue with DPP is pretty consistent, doesn't require any specific kind of scene...sharp edges are usually aliased a bit, regardless. In my experience, fine edges and lines with ACR are usually very clean and crisp, without the endemic jaggedness that occurs frequently in DPP. Sure, there are some difficult cases that fall outside the realm of normal for any algorithm, but AHDD is one of the better demosaicing algorithms, and DPP clearly does not seem to use it.
I wonder if we are not using different terms. Maybe we are meaning two different things by jaggedness. Maybe you are using that to refer to what zipper artifacts (like the jaggy teeth in a zipper) while I've been using it to refer to thin lines that look jaggy in the sense that they are stair-stepped and maybe we actually both agree?
There is aliasing, and there is moire. Moire is a form of aliasing, aliasing is not moire (it encompasses moire, other forms of aliasing.) I think you are just thinking about aliasing in general, which yes, is the stairstepping along sharp edges in the absence of AA. Moire is very specifically defined as the effect (a pattern) caused by interfering waveforms, which is a kind of aliasing (the aliases in a moire pattern are "fake" information generated by waveform interference, as each resolvable point does not represent real-world information.)
Moire exists outside of the world of digital cameras. Think of looking through two sets of railing, bird feathers overlapping and so on. If you're there looking at it with your own eyes, the moire is visible. Therefore this particular type of moire is not camera induced.
It very well can be. It's not intrinsically there, if the eye sees it, it would only see it at certain particular scales of distance.
Moire is the result of pattern interference. It doesn't really matter the scale, the effect is scaleable. If you have two crosshatch lattices in your yard, and you were able to line them up relative to each other, the two would create a moire pattern. All that is necessary for moire is for patterns with similar frequencies to interact and interfere with each other. Palm fronds crossing over each other, two nets overlayed on top of each other, bird feathers crossing over each other...all of these create moire. Moire is a consequences of waves in nature (no, not water waves), waveforms interacting and interfering to produce an entirely different "output" waveform that does not resemble any of the originals.
Moire doesn't come from light wave super positioning and interference. That doesn't even make sense, since you can print out large thick lines on a piece of paper and create it, that is pattern frequency and scale interaction and it's all positive additive.
I never said moire came from light waves at all. It comes from WAVES. Waves exist in all kinds of spatial media, it implicitly has nothing specifically to do with just light.
OK, well when you said not water waves and so on I thought you meant light waves, my mistake.
But it almost sounds like you are at least trying to say that these spatial moire patterns are simply coming from interfering wave patterns? Or maybe that is not what you mean to say?
And yeah well it can both be there intrinsically or not, depending, but not all moire on feathers and stuff is intrinsic, I'd guess that most moire in photographs isn't coming from something intrinsic in the scenes, although it could be.
It depends on how you look at things. Waves are everywhere. They don't just exist as sound or light or as longitudinal and transverse waves in water. Waves are mathematical. They define things that oscillate. EVERYTHING oscillates.
Atoms vibrate. That's oscillation. That's a wave. It doesn't "look" like a sine wave of you sit there and observe an atom vibrating, but when you plot the position of the atom in a given dimension over time, you DO have a sine wave (with some amplitude, frequency, and phase.)
Wind is a wave. If you think about it, wind occurs in blasts or pulses. Even the lightest breeze is a sine wave of some form or another. This can be seen when a breeze moves through a playground...just look at the swings. They don't all move in unison...they move as though they were attached to a string that someone was sending pulses down, like when you attach a string to a doorknob, take one end in your hand, and move your hand side to side. (Wind is actually also one of the primary causes for waves in water...the sine wave formation of water waves is often given rise to by the sine wave oscillation of air moving across it.)
The fronds of a palm splayed against a bright sky can be observed as a wave. The fronds are the troughs, the sky are the crests. A complex wave can be used to describe that "oscillation" of light blue and dark green. Cross two palm fronds over each other, and you create an interference pattern.
Same thing goes for the feathers of a bird. Each barb is a wave crest, and the space between them is a trough. Overlay multiple feathers on top of each other, and you have a complex moire pattern.
The vibrating of the compressor in your refrigerator that you feel in the hardwood floor via your feet...that's a wave. Blinking light...the blinking, not the light, is a wave (and, of course, the light itself is a wave.) Waves are everywhere. Even the complex detail of a photograph is produced by waves...two dimensional waves, in this case, described by a Fourier series (very complex system of waves in a multitude of frequencies that interfere to produce a complex non-random result), which is why we can end up with moire when the SPATIAL waveform (not the light waves, but spatial waves) of the image resolved by a lens interfere with the ordered spatial grid of an image sensor.
Waves. More than just light, sound, and water.