xpatUSA

xpatUSA

Lives in United States Bellville, TX, United States
Works as a Retired
Has a website at tcktek.blogspot.com
Joined on Dec 15, 2011
About me:

Mostly interested in Foveon technology.

xpatUSA's recent activity

  • Half-size, slight crop at left to remove garden hose. Trying out my newly-acquired DP2s today. This once mighty oak was felled a good few years ago and is under constant fungal and termitic attack.
  • Yes, indeed you understand the plot, Tom. Not sure I understand the question, sorry. By "patterning" I was referring to the recurring similar-looking groups of 4 counts along the top of the histogram.
  • SD14? The illustration was from a 2002 Foveon paper, so definitely not a SD14. http://kronometric.org/phot/sensor/fov/2002%20Color%20Paper%20-%20Allen%20Rush.pdf As to the Bayer camera, Scott, I ...
  • Early Foveon sensors are stated to non-linear above a certain value, for example the F7 model which has good linearity up to 45,000e- but saturates at 77,000e- http://kronometric.org/phot/sensor/fo ...
  • I think Roland is referring to his own listed raw values, not my histogram. But, anyway, here's a couple of sky area histograms at unity binning for our interest. There does appear to be some ...
  • Although this sub-thread is mildly off-topic ;-) I feel moved to comment that the concept of "comparing" images from different sensors without mentioning at least a few properties of comparison ...
  • In George's defense, one can only assume that it is correct for that tree. It's not like the Nederlanders are ignorant about the proper treatment of flora in their country?
  • Yep, here's the raw histogram for the sky where the banding is: Numbers are just as Roland said, and the good old Merrill "Sydney Opera House" effect is quite visible too. Gotta love it :-D
  • Well, here we all are, yet again using the word "resolution" all by itself without qualification and thereby meaning whatever each author wants it to mean. I calculate the "resolution" of the Leica ...
  • Back in the "old country" I recall a saying . . something about humor and constipation, if you get my drift . . . ;-)
  • A hard question to answer. I'll speculate that the blue channel in Merrills appears to suffer from some sort of tonal patterning probably scene-dependent. See the sky histogram in my previous post. ...
  • Thanks, Vitée, I have some oaks in similar condition to that second one but, being taller, they tend to fall so I try to fell them first :-) A tenous link - my cousin lives in Croydon, VC.
  • Pardon my ignorance, Jim, what kind of tree is that? I like the hut - wood and tin, a truly aesthetic combination. Are those poles thick enough to hold up all that heavy sheet metal, d'ya think? ;-)
  • Reviewing my original post, I realize that the image and the title of the link imply that I like the color accuracy of the Foveon. What I was really trying, and failing, to highlight is the lack ...
  • Quite so. Round here, fences, power poles and wires are part of the scenery. Personally, I leave them in but have been criticized for that occasionally - not here, I'm pleased to say.
  • Created discussions Your Favorite Tree?
    A recent post showed a 'favorite tree'. I felt moved to post mine. Rather than 'hijacking' the thread, I'm posting mine here: How about yours?
  • A hundred bucks says it ain't gonna happen . . . . . . . IMHO
  • This image says it all: It's from a Foveon article and comes complete with Foveon 'spin' - note that the Bayer confusion at left is emphasized by desaturation, sharpening and contrast compared to ...
  • Pardon my edit of your signature, Malcolm ;-)
  • I was indeed Adobe-free intentionally for a short period, but I put Elements 6 back on my main computer for research reasons. And then I had to restor Flashplayer because so many useful sites ...
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