I am working at the new version of my night-time timelapse script, and I am testing some algorithms to measure the correct exposure of a picture taken at night.
You see here:
http://francescobonomi.it/expo/a tool I did to experiment a little.
WARNING: THERE'S A LOT OF UNRESIZED IMAGES, not for dial-ups!
To give it a test try, do the following:
- click on fist image
- click on first frame
- click on "change parameters"
- click on "Night with visible sky"
- Press the "Set" button at the end of the page
You can now browse the images, and for all images the program will tell you if he thinks it's over-exposed or underexposed, with correction factor that would basically tell the program if and how much the exposure for next frame should be changed.
I will discuss later the details of the program, for the moment I am asking a favour...
To properly test the algorithm, I need a variety of shots taken in very different conditions (in town, in the country side, at dusk, at full night, with/without string artificial lights etc.).
It would help me very much if some of you could take some of these pictures. I am seriously lacking series taken in town, but other conditions would help too!
Basically, I need series of 15-20 pictures of the same setting taken with exposure times ranging from 1/2" to 65", in rather small steps
Sample settings for shooting could be:
Resolution: Small (640x480)
Sensitivity: 800
Continuous mode
Bracketing in continuous mode
Tv Bracketing 1/3 EV
Bracketing mode: -
Probably you will have to set focus to manual, set to infinity .
thanks to anyone that will help!
PS: This script can be useful, it simulates keeping the "shoot" button pressed until you press any kay...
@title Continuous:
print "Continuous-drive:"
press "shoot_half"
sleep 3000
press "shoot_full"
gosub "waitpress"
release "shoot_full"
release "shoot_half"
print "Done..."
print ""
end
:waitpress
wait_click
return
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