I Dare You!

by peter_budo

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3,453 reputation
825
bio website tangentsoft.net
location Aztec, NM
age 41
visits member for 4 years, 1 month
seen 5 hours ago

Software developer, professional since the early 90s, amateur back to the mid 80s.

Maintainer of MySQL++.

Maintainer of the Winsock Programmer's FAQ.

Pixel pusher for fun, mostly photography, but some 3D (my avatar is one of my pieces) and 2D art.


Mar
28
awarded  Citizen Patrol
Mar
24
answered How do I create Lightroom smart collection containing all virtual copies?
Mar
20
answered How can I light an Indian wedding without spoiling the decor or blocking the view with stands and gear?
Mar
19
revised How to shoot a reflection in a ball bearing without appearing in it?
swapped the paragraphs, and joined broken lines to make paragraphs, as the answer flows better from the "yes" answer to OP's question to tangential advice; rewrote the clothing para for clarity and grammar
Mar
19
revised How to shoot a reflection in a ball bearing without appearing in it?
Changed "zoom" to "telephoto". It doesn't have to be a "zoom," and some "zooms" are wide-to-wide or wide-to-normal.
Mar
19
reviewed Edit How to shoot a reflection in a ball bearing without appearing in it?
Mar
19
revised How to shoot a reflection in a ball bearing without appearing in it?
Changed title so it is easier to find; other grammar and clarity tweaks
Mar
18
awarded  Good Answer
Mar
17
comment How can I add a border to a JPEG photo without affecting quality?
@Raphael: I think if I were to write a program to do this as its primary purpose, I would round the top and left border sizes to the nearest multiple of 16, regardless of user input. At 240 dpi for printing, that creates a maximum offset error on the page of 1.6 mm. You can probably get an error that big due to slippage of the paper as it enters the feed rollers. Then on the right and bottom, you'd end up with as many as 15 px of the image or border requiring re-encoding before you can get back to "clean" white pixel blocks to finish out that border.
Mar
16
awarded  Nice Answer
Mar
16
comment How can I add a border to a JPEG photo without affecting quality?
@IlmariKaronen: That sounds plausible. Another problem with my patch is that it segfaults the program; I assume I'm misinterpreting the size of those JBLOCK 2D arrays, so I'm writing off into memory space I don't own. Feel free to make your own patch, or riff on mine. I think I've chased this rabbit as far down the hole as I care to.
Mar
16
comment How can I add a border to a JPEG photo without affecting quality?
@mattdm: Yes, jpegtran can also extend the image, but it always pads with a hard-coded middle gray, RGB(128,128,128). It does that simply because it's the only easy option, since in DCT coefficient space, you can do it with a simple bzero() call. I tried a wild hack at changing this, which doesn't work, but should give you a sense of the ugliness involved. throws hands up in frustration
Mar
16
answered How can I add a border to a JPEG photo without affecting quality?
Mar
5
comment How to verify\calibrate a light meter?
Correct answer. I would expect a proper calibration to cost around US $100. It's a lot like paying a plumber or mechanic: you're paying for the cost of a skilled worker's time and for a slice of the cost of all the equipment they need to do the job. Calibration equipment is expensive. A complete cal station in the lab might have hundreds of thousands of dollars worth of equipment in it.
Mar
4
awarded  Yearling
Mar
1
awarded  Informed
Mar
1
awarded  Nice Question
Feb
7
revised Is it possible to photograph the aura of a person?
clarity tweak
Feb
6
answered Is it possible to photograph the aura of a person?
Feb
5
reviewed Approve Shooting flying birds