Mike Chaney's Tech Corner
July 28, 2021, 01:24:09 PM *
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1  Mike's Software / Qimage Ultimate / Re: Politics, Religion,... on: June 24, 2021, 03:52:39 PM
My main tools are now Qimage and Affinity Photo. Just a heads up, for a few more days Affinity is having a 50% off sale on their products.
2  Mike's Software / Profile Prism / Re: IT-8 Target 1&2 on: June 01, 2021, 02:39:03 PM
Interesting! It does have a florescent source. I'll see what the big scanner/copier at work has and see if I can use that. My control over what it's doing is more limited but being new, I bet it uses LEDs.
3  Mike's Software / Qimage Ultimate / Re: Help me with hideous green on: May 31, 2021, 02:44:08 PM
Thanks Bill! After much testing, I discovered that my Red River factory profile gives a wider gamut in the green than my Profile Prism profile. I like the Profile Prism results better in every way, other than the green, so I started a post in the Prism forum. You noted that my image was out of gamut in the shadows, which is exactly what I see with the Red River factory profile. With my profile, the entire green leaves are out of gamut. We'll see what happens if I can improve my Prism profile.
4  Mike's Software / Profile Prism / IT-8 Target 1&2 on: May 31, 2021, 02:39:59 PM
1) My Red River factory profile produces a wider gamut in the green than my Profile Prism efforts. My target has been stored well, but is 15 years old! I have a pretty good T/R densitometer (Xrite 811, I think). Can I measure my target and compare the results to the matching text file to determine if it's faded? What's the organization of the file? Can I create a new one myself?

2) I've seen some PR stuff on targets with wider range. Would something like that deliver a better profile? (If I could afford it!) My scanner is an Epson 4490 Photo. I think it's decent, but could it be causing a lack of gamut in the green? Maybe I have problems with other colors, but right now I'm fixated on green. FWIW, I like the results of my Profile Prism profiles better than factory in every area except for the green limitation.
5  Mike's Software / Qimage Ultimate / Re: Help me with hideous green on: May 27, 2021, 11:44:24 PM
Where is this "attaches file" you speak of?
6  Mike's Software / Qimage Ultimate / Re: Help me with hideous green on: May 17, 2021, 11:53:54 PM
Being an old black and white darkroom guy, I always use glossy paper for the range. Same with color, one of the Red River glossies. Learned something new again, that negative fill will make the problem worse, not better. So I increased the fill, reduced the saturation and contrast and things did get somewhat better. Still not quite what I remember the scene looked like, but tolerable. Soft proofing is doing a surprisingly good job of predicting what I'll get. I was also surprised to see how bad perceptual rendering can make things. I'm sure there's a problem it solves, but this definitely wasn't it.

7  Mike's Software / Qimage Ultimate / Help me with hideous green on: May 17, 2021, 12:08:07 PM
Wandering the woods yesterday I shot some plant life shortly after it rained. The light was good and what I see on the screen is reasonably close to what I remember things looking like. Qimage says the green leaves are out of gamut and, as expected, printing is a problem. Perceptual destroys all the contrast and detail.  Relative isn't as bad, but the resulting green is nothing like what it should be. My printer is a Canon PRO-100. Any hints on which way to go with this- less saturation or shift the color to something else or just shoot less green leaves?


Also, not sure how to make the last two save as files rather than display in Chrome.


8  Mike's Software / Profile Prism / Re: Profile Prism's Status on: May 05, 2021, 05:58:10 PM
Same here- have used it for years and it just works!
9  Mike's Software / Qimage Ultimate / Re: Having trouble understanding HDR on: May 02, 2021, 02:29:22 PM
Works great! Thanks!
10  Mike's Software / Qimage Ultimate / Re: Having trouble understanding HDR on: April 28, 2021, 02:54:22 PM
Thanks! I didn't appreciate that a smaller box would have more weight, not less. My HDR assumption was that this image has a huge dynamic range but OTOH I suppose you could say that about any image with a specular highlight and a shadow.  Grin
11  Mike's Software / Qimage Ultimate / Re: Having trouble understanding HDR on: April 28, 2021, 10:44:06 AM
Hi Mike- thanks! I did the same with the magenta box, something similar with the yellow, but what's the thought process behind the white box? Also, what determines if an image is a candidate for HDR?
12  Mike's Software / Qimage Ultimate / Re: Having trouble understanding HDR on: April 28, 2021, 02:27:38 AM
Just for entertainment, here's a RAW from my Z6 that has some nice highlights in the center that need to be recovered, and a tree with a shadow area that needs to be lightened up. I was shooting more or less into the sun and it just has to qualify as a good subject for HDR. It was the file I started having trouble with. My preferred RAW settings are no sharpening, no equalization, no noise filters, no smartcolor, no auto fill (but need that on so save works) and default everything else. I find the Z6 images need very little processing at that stage; everything else I like to mess with on an image-to-image basis.


13  Mike's Software / Qimage Ultimate / Re: Having trouble understanding HDR on: April 25, 2021, 11:08:54 PM
Getting closer to the bottom of this. Everything was working correctly until I went into preferences and put my RAW processing choices back to where I like them. Then the problem showed right back up. I'll investigate a bit further and determine which setting is culprit.

edit- I've been wrong before (just ask my wife!) but it appears that auto fill light must be turned on in RAW processing for fill to be saved in RAW refine and for HDR to work correctly. Is it a feature or a bug?  Grin
14  Mike's Software / Qimage Ultimate / Re: Having trouble understanding HDR on: April 25, 2021, 06:03:06 PM
The root of the problem is that the fill setting is never being saved. I've disabled pretty much everything on startup and the only virus program is Windows Defender. I've installed the latest version, also tried installation and launch as administrator. The rest of the raw refinements do seem to be saved. If it's a clue, the fill setting is never reflected in the thumbnail appearance. All suggestions gratefully accepted!

edit- if I hold shift while starting, everything works as it should, and continues to work correctly on subsequent launching, even if I don't hold shift. Perhaps I'm too old to be using computers?

15  Mike's Software / Qimage Ultimate / Having trouble understanding HDR on: April 25, 2021, 03:10:47 PM
OK, I haven't used this much, but the controls aren't making a lot of sense to me. I start out setting exposure with one of the 9 squares. Then I use the fill and HDR sliders. Every time I touch the HDR slider, it reverts the fill back to zero. When I get what I think I want, and save it, the same image opened in the editor doesn't seem to have my adjustments. Nor are they preserved if I try to refine again. What am I doing wrong?

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