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Normal Moon hack

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moon hack

I've been longing to shoot a good scenery with a big moon. Some reasons make this difficult:

  1. the moon has to be near the horizon;
  2. the moon has to be at the same direction as the scenery;
  3. I have to be far away from the scenery and use a telephoto lens to magnify the moon in the photo; (note that the moon looking big when it's near the horizon is a total pychological effect (thank Mike for teaching me this))
  4. the moon is much brighter than most sceneries at night, which makes correct exposure difficult.

However, such an effect can be achieved in post-processing. R. Burden did this using Photoshop[1]. I repeated the procedure in GIMP, which is a free alternative of Photoshop:

  1. open a scenery photo and a moon photo in GIMP;
  2. drag the moon layer into the scenery photo;
  3. in the layers panel, click the "Mode" pull-down menu, and choose "Screen";
    Choose "Screen" in "Mode" menu
  4. adjust "Levels" ("Colors" menu -> "Levels") and "Opacity".

Tips: if the foreground is lit by direct sunlight, the foreground should be brighter than the moon. Otherwise the moon should be brighter than the foreground.

More hacks:
http://www.wensh.net/up/2/img/1962_3.jpg

http://www.wensh.net/up/2/img/1962_4.jpg

Reference
[1] R. Burden, Outdoor Photographer 2008-8, 92 (2008)

Last edited by Wen at 2008-10-26 21:44:23

Wen posted at 2008-10-26 21:43:24  

Normal A Texas Hold'em problem

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(Chinese version of this topic, 中文版)

2 players A and B play Texas Hold'em, each with initial cash $1000. After some hands, Player A wins money $q and player B loses the same amount, ie player A has $(1000 + q) and player B has $(1000 - q), where -1000 < q < 1000. Now the small blind is larger than $2000, so from now on they have to all-in every hand.

(1) What's the probability of player A winning the game P[A win] ?
(2) Counting from now, what's the probability of player A winning the game at the n-th hand P[A win, n] ?

Last edited by Wen at 2008-10-26 12:32:02

Wen posted at 2008-10-26 12:10:02  

Normal Greeting

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Hello!
Your S5 pictures are amazing (and the E5000 too /em15/ ), You perfectly know, how to use it. I have the same S5 camera, and i rlly enjoy the shooting with it. If You are interested, heres my galery: http://picasaweb.google.com/adam8106

Keep up the great work!
Adam (Budapest/Hungary/Europe)


Adam (guest) posted at 2008-10-20 13:50:06  

Normal Organize and version control digital photos with Subversion (advanced)

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If you have no idea what Subversion is, or how to install Subversion, or how to add photos to a Subversion repository, please read Organize and version control digital photos with Subversion (basic) first. Here we are going to discuss some advanced topics.

Recommended folder layout

Subversion has no restriction on the folder layout in the repository. What folder layout to choose is totally up to you. The Subversion documentation recommends creating a "trunk" and a "branches" folder at the root of the the repository. Here's a folder layout I use:

|-trunk
|  |-20070901
|  \-20080304
\-branches
   |-web
   |  |-20070901
   |  \-20080304
   \-printing
      |-20070901
      \-20080304

I keep the maximum-size photos in the "trunk" folder. When I need to resize or crop some photos, for example, for posting on my website, I do the converting job and then put the converted photos in the "branches" folder.

Move/Rename photos

Suppose you followed the instructions in Organize and version control digital photos with Subversion (basic) and created such a folder layout:

|-20070901
\-20080304

How do you convert this layout to the one recommended above? Here you need the "move" command. You can follow these commands:

...

Read the whole topic

Last edited by Wen at 2008-11-08 11:11:28

Wen posted at 2008-10-19 15:39:26  

Essence Yellowstone National Park (August 2-7, 2008)

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(Chinese version of this topic, 中文版)

http://www.wensh.net/up/2/photo2008/080802~07/IMG_7201.JPG

This trip was fantastic, not just because of the stunning natural sceneries, but also because the whole trip was so well-planned, with every single detail taken care of by the senior students and their wives. And I must thank them at this point. Yosemite National Park was a well-known collection of beautiful natural sceneries. However, in my opinion, it's not as wonderful as Yellowstone, although it's said that the time I went to Yosemite was not the perfect season. I'm not saying Yosemite was not beautiful. It was, in fact. The blue sky, the green trees, the gray granite cliffs and the clear streams showed a colorful painting. Running squirrels and flying birds animated the painting. Nonetheless, such a painting could be seen at many other places, while a lot of the sceneries and the creatures at Yellowstone were unique as far as I had ever seen. I had surprises everyday at Yellowstone.

D1
D2
D3
D4
D5
D6

http://www.wensh.net/up/2/photo2008/080802~07/IMG_6484.JPG

http://www.wensh.net/up/2/photo2008/080802~07/IMG_6944.JPG

Browse all photos in Photo Gallery...

See also:

Last edited by Wen at 2008-12-07 00:17:01

Wen posted at 2008-10-14 00:11:36  
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