Ugly Hedgehog® - Photography Forum
Nikon and AA filters (Aka “Low pass” filter)
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.
Page: <<prev 1 2 3
Mar 18, 2019 08:32:46   #
Rich1939 (a regular here)
 
larryepage wrote:
I have not seen any visible moire in any of my images since shooting a 6 MP Fuji S3 Pro more than 13 years ago. It was really poor at rendering high contrast lines which appeared at an angle in images...like power lines against the sky. Still have some images demonstrating that. Early Samsung HDTVs were similarly poor rendering angled lines...many times the shafts of golf clubs would completely disappear as the player was setting up for a shot. In that case, though, their early DSPs (Digital Signal Processors) were not up to par, but the results were much the same. This effect could also sometimes be seen when attempting to copy halftone images on a copy machine. That's why many of them had special settings for copying anything other then text.

I do not know the answer to the question of why some sensors don't have AA filters, but in looking at the table of pixel pitches above, I suspect that the answer may be that it has nothing at all to do with need or desirability. Rather, I suspect that it may be simply too difficult to fabricate reliable AA filters with proper geometry at the smaller pixel sizes, at least right now. Many years ago, when I was working in the semiconductor manufacturing industry, the design and product engineers had an inside joke around integrated circuit design. It was simply, "If you can't fix it, feature it." I later heard stories about the same attitude being prevalent in the design of early PCs.
I have not seen any visible moire in any of my ima... (show quote)


Or "if you can't fix it, license it to National"

| Reply
Mar 18, 2019 08:56:25   #
TriX (a regular here)
 
larryepage wrote:
...Many years ago, when I was working in the semiconductor manufacturing industry, the design and product engineers had an inside joke around integrated circuit design. It was simply, "If you can't fix it, feature it." I later heard stories about the same attitude being prevalent in the design of early PCs.


(smile). Haven’t heard that in awhile, but it’s not just confined to the IC industry. When faced with a design flaw or product weakness, sell it as a feature.

| Reply
Mar 18, 2019 09:27:39   #
selmslie (a regular here)
 
larryepage wrote:
... Many years ago, when I was working in the semiconductor manufacturing industry, the design and product engineers had an inside joke around integrated circuit design. It was simply, "If you can't fix it, feature it." I later heard stories about the same attitude being prevalent in the design of early PCs.

In the software industry we said, "It's not a bug, it's a feature." We just trained users around it until we could issue a new release.

| Reply
Mar 18, 2019 11:35:56   #
Thomas902 (a regular here)
 
I'm surprised that no one has bothered to offer a solution to a situation where moire color contamination is visible to the point of being unacceptable...

For wedding gowns it can be easy if they are white... simply select the gown and create a new adjustment Hue & Saturation layer... desaturate the gown... or better yet, choose the color channel of the moire and desaturate that one only... I've typically had more of a rainbow effect so desaturating entire gown works best....

Or if the fabric is a solid color add a new layer.
Select the eyedropper tool and select the color of the fabric, (not the moire.)
Switch to the paintbrush tool and paint over the item with the moire.
With the new layer selected set the Blend Mode to Color.
This isn't a great idea if fabric isn't evenly lit...

The very worst way is to try to beat it to death with Defringe or even worse Gaussian Blur...

On occasion I've actually had success with selecting the area and then use the Lens Correction Filter "Fix Chromatic Aberration" then tweaking Red/Cyan; Green/Magenta; or Blue/Yellow to minimize the moire...

Thinking you guys and girls need to focus on photography NOT camera sales...
The UHH appears to be a breading ground for wannabe camera salespersons...

Does anyone here actually currently work in the craft? seriously...

| Reply
Page: <<prev 1 2 3
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.
UglyHedgehog.com - Forum
Copyright 2011-2019 Ugly Hedgehog, Inc.