Mike Chaney's Tech Corner
August 11, 2020, 12:25:45 AM *
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46  Mike's Software / Qimage Ultimate / RAW ISO on: April 20, 2019, 12:12:23 AM
When I see ISO:125 (pushed to 320), what does that mean? The camera was set to 125. Where does the push info come from?
47  Mike's Software / Qimage Ultimate / Re: Print what I see - 4th attempt on: April 16, 2019, 06:08:18 PM
Many years ago when I was doing wet printing in the darkroom, border-less prints became popular. I used adhesive easels for the paper for a while, then Omega came out with a nice borderless easel that held the paper just by the edge. There were arguments about the desirability of border-less, as it left the prints subject to physical damage over time. Staining also tends to happen near the edges under some conditions. For archival prints one definitely wanted borders and I'd say the same today.

Today the issue of physical damage remains, plus over-spray. Even though printers are (we hope) designed to handle a reasonable amount, IMHO it's best to avoid it. Like MelW, if I want border-less, I trim after printing.
48  Mike's Software / Qimage Ultimate / The bit depth question on: April 11, 2019, 05:14:35 PM
I've read a lot of the "historical documents" on the 'net about wanting to get 16 bit/ch tiff files from the Qimage raw converter. Is there a way to do this yet? I also don't understand what I've read about the editor being 8-bit, but the program will dither 16-bit images to improve performance with the Windows 8-bit drivers. Is that only when images have not been edited in Qimage, but have come in from someplace else? Naturally I ask because I'd love to get 16-bit images saved after refining the raw.
49  Mike's Software / Qimage Ultimate / Re: raw processing & color fringes on: March 25, 2019, 11:34:53 PM
Thanks! That helps a lot. I'm well aware of lens aberrations, but I'm looking at higher contrast targets in the center of the frame, so I'd expect the lens to be pretty good there. As I mentioned in another post, I'm just starting to do more with raw, and am trying to fine tune the workflow and understand what I see using different tools. Guess what tool wins again!
50  Mike's Software / Qimage Ultimate / raw processing & color fringes on: March 25, 2019, 03:28:45 PM
I notice my jpegs direct from camera (Nikon D200) have very little color fringing. Shooting raw, from another raw converter the problem is worse. From Qimage it's much better. Just to help my understanding, is this something there are settings for, or is the raw converter just smart enough to take care of it. I'm also assuming this is related to the Bayer filter, as the fringes are visible in the center of the frame, obviously at high magnification.
51  Mike's Software / Qimage Ultimate Wish List / Re: Out of gamut warning? on: March 13, 2019, 05:39:45 PM
Already doing it, and I'm finding much of my editing is moving out of my editing program, and into Qimage. It's just a heck of a program.

My philosophy on the monitor is probably too casual, but I put priority on the printer. If everything is correct, the various reference images on the 'net will print beautifully. And they do. If the monitor displays the correct grey-scale, and looks like those printed images color-wise, I'm happy. And it does! My environment around the monitor is uncontrolled  and varies a lot, so I don't know how much I'd gain from doing an instrumented calibration.
52  Mike's Software / Profile Prism / Epson 4990 scanner settings on: March 13, 2019, 04:46:56 PM
Back when I used Profile Prism a lot, I had a different scanner. I decided to make some profiles recently and am having trouble with the IT-8 target image. New scanner is the Epson 4990. Tried about every combination of settings, but Profile Prism always reports the scan is under exposed and has poor illumination uniformity. In any editor, the scan looks great and the white square is just under 255, so it isn't underexposed. The light bar moves with the sensor, so I can't imagine how the uniformity could be bad. My target is old, but still looks great. I'm using the right change # for the target. Using 48 bit tiffs. Any ideas to try?

edit- Oh, never mind. The idiot wasn't positioning his corner markers correctly on the lower edge. I'm blaming it on daylight saving time.
53  Mike's Software / Qimage Ultimate Wish List / Re: Out of gamut warning? on: March 13, 2019, 12:58:08 PM
FWIW, I use a Canon PRO-100 and factory ink. Not sure what it's capable of printing in terms of color map, but it's certainly well known that using matte paper is going to kill the blacks and limit the range. I mostly use Red River UltraPro Gloss 2.0 and their supplied profiles. Monitor is a Viewsonic VP-2468 that isn't wide gamut, just sRGB and a maybe tad more. Calibration by eye. Camera is my antique Nikon D200.

I haven't typically shot raw, but am trying to do more. I'd like to use the larger color spaces, but I'm just a babe in the woods with that. It may be a fools errand; the reality is that a properly handled jpeg does everything I need most of the time. What I did find is I seem to be capable of processing images to have significantly out of gamut colors, even if they started out OK. Some things I shoot at work with colored plastic stock boxes and flash are also just wildly out of gamut. I think the information from the gamut warning is useful for choosing the rendering intent for a given image. Soft proofing works quite well for me, though in all honesty I usually just hit the print icon and am happy.

Anyway, I'm very happy to have the feature, though I hope it doesn't cause more questions and instill more fear than it's worth. Certainly a page of explanation would be useful, emphasizing that what it shows isn't always trouble and gets handled in the rendering process.
54  Mike's Software / Qimage Ultimate Wish List / Re: Out of gamut warning? on: March 10, 2019, 11:52:27 PM
Wowza! I learned some things in the first few minutes of trying it. Thanks!
55  Mike's Software / Qimage Ultimate Wish List / Out of gamut warning? on: March 09, 2019, 01:44:09 PM
I understand PS has this, but have never used it. Is it actually useful and, if so, possible to implement in Qimage? I suspect a lot less is out of gamut then people think, and this would prove it one way or another.
edit- I'd be just as happy to see the image outline on the CIE color diagram as highlights on the actual image, if that's easier.
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