Lightnings taking a ride

by ceinmart

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293 reputation
212
bio website john.jersdesk.com
location North Salt Lake, UT
age 43
visits member for 4 years, 9 months
seen Aug 26 at 10:50

I am a software developer. I am particularly fond of the areas:

  • artificial intelligence, computer vision & machine learning
  • high end graphics & image processing
  • games

As stackoverflow changed their icon in celebration for several days when the US Supreme court unlawfully legislated to make gay marriage legal, I will in turn address the matter in my stackoverflow profile. That is the only way I can, in good conscience, continue to participate in stackoverflow.

I stand by the bible's teachings on the matter of homosexuality. I am a member of the Church of Jesus Christ of Latter-Day Saints, also known as a Mormon. That means I consider homosexuality and related immorality to be a perversion. By contrast I consider marriage to be sacred. The court has no more right to redefine the family than government can change the fact that men are born with God given inalienable rights.

I am also a mathematician.
I quite like interesting games and enjoy playing them with those of my many wonderful children who are old enough. We will often edit what we might find to be sleazy in a game without altering the game play, which quite widens the range of games we can play while staying within what we consider to be gospel standards.


Aug
19
awarded  Critic
Aug
19
comment Why milky way galaxy cannot be seen by human eye while by camera?
Except cameras have a much poorer dynamic range than the human eye. A human eye can make out something light and dark in the same scene, but cameras will either wash out the light area or leave the dark area a charcoal grey mess, depending on your exposure setting.
Jul
17
comment How to do time-lapse photography without intervalometer using Nikon D3300?
@martinerk0 Would it be easy to do this from an android phone? That seems far more portable. Taking a quick look at google play I see some wireless intervalometers for android. I don't know if there is a cabled one in there as well (as d3300 doesn't have wireless by default)
Jun
23
comment Is there a trick to separate an old photo moisture-fused to glass?
The glass had cracked on one photo, and we recovered quite a bit more near the crack and photo edges. We also went way, way past 20 minutes allowing the edges to fray, as the center was more important. Cracking the glass intentionally poses obvious risks. But I kind of wonder if breaking the glass more before soaking might have actually worked better. Maybe, maybe not, and no way to know offhand.
Jun
23
comment Is there a trick to separate an old photo moisture-fused to glass?
I think it was our best hope and very clever, but we still had a lot that wouldn't separate from the glass.
Jun
22
asked How is depth of field usually measured and how can I get depth of field measurements for a lens
May
10
awarded  Notable Question
Mar
7
revised How can I automatically correct aerial perspective in landscape photographs?
added 187 characters in body
Mar
7
revised How can I automatically correct aerial perspective in landscape photographs?
added 659 characters in body
Mar
7
answered How can I automatically correct aerial perspective in landscape photographs?
Mar
7
comment How can I automatically correct aerial perspective in landscape photographs?
Oh cool, and I just realized I can get a cheap wavelength specific version if I can find a source for average color spectrum of daytime sky (and then apply the trick in my previous comment)
Mar
6
comment How can I automatically correct aerial perspective in landscape photographs?
I'm sure this has been studied and a "per wavelength" results for distance D have been derived or extracted. Typing these out it occurs to me that a cheap version is to ask how much air is standing in a column above you to add up to 1 atm air pressure at sea level. Then assume the effect is linear and that aerial perspective is linear in the amount of air standing between you and your subject and use an average sky value for averaging. I'll have to try it out.
Mar
6
comment How can I automatically correct aerial perspective in landscape photographs?
@DrMoishePippik Clever idea, but there is relatively little of that and actually overexplosed points can still show as true white (because as long as "enough" light gets through to push a pixel to white it will still show as white)
Mar
6
comment How can I automatically correct aerial perspective in landscape photographs?
@Rafael You are correct. It is just as complex as sky color (because that is actually how the sky gets its color). But for such things usually autocorrecting to an "average expectation" is far better than doing nothing.
Mar
6
comment How can I automatically correct aerial perspective in landscape photographs?
@mattdm Aerial perspective and linear perspective both show distance. Geometric perspective shows it by distortion, aerial shows it by color change (mountains in the distance are blue and hazy, i.e. a change in color shows distance)
Mar
6
asked How can I automatically correct aerial perspective in landscape photographs?
Dec
4
accepted How does the usual jpeg 0-100 quality settings translate into Photoshop's 0-12 quality setting?
Dec
4
awarded  Curious
Dec
3
comment How does the usual jpeg 0-100 quality settings translate into Photoshop's 0-12 quality setting?
I did see that one. I didn't think it did. But possibly it is the case that quality number 0-100 isn't actually part of the jpeg standard (i.e. there aren't quantization tables specified in the standard by a given quality number) and so there IS no direct translation between adobes and libjpegs quality numbers because they actually use different quantization tables altogether. If that is the case, then there really isn't a translation between them and the answer you pointed to is as good as it is going to get.
Dec
3
asked How does the usual jpeg 0-100 quality settings translate into Photoshop's 0-12 quality setting?