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HDR with stacking script help

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Offline brizo

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HDR with stacking script help
« on: 20 / September / 2012, 13:36:54 »
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Hi,

Can someone please give me some help/advice with this script?  I don't know how to get it to work, I know this may sound stupid but I don't understand    what it means about the left/right action as I don't know what or how to get something on the screen to do this. I've checked the forum and saw one thread. It it didn't give me any help!  Sorry for the newbie ignorance but any help would be much appreciated.  I'm using an sx40 if this helps.

Thanks

Re: HDR with stacking script help
« Reply #1 on: 20 / September / 2012, 14:52:51 »


Can someone please give me some help/advice with this script?

What script are you referring to ?

You need to post a copy here or a link to where you found it.

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Offline msl

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Re: HDR with stacking script help
« Reply #2 on: 20 / September / 2012, 14:58:15 »
Which script did you mean?

It's seem, you try a very old script ( left/right action). This will not work with your SX40.

You do not need a script for bracketing. CHDK has a inbuilt bracketing function. Read more about this functionen here: http://chdk.wikia.com/wiki/CHDK_User_Manual#Bracketing_in_continuous_mode

msl
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Re: HDR with stacking script help
« Reply #3 on: 20 / September / 2012, 16:49:47 »
You do not need a script for bracketing. CHDK has a inbuilt bracketing function.
And if you have a USB remote available,  you can even do bracketing without the need to setup the whole timer thing.   Its built in as one of the "output module" options.
Ported :   A1200    SD940   G10    Powershot N    G16


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Offline brizo

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HDR with stacking script help
« Reply #4 on: 20 / September / 2012, 16:56:15 »
Thanks for the replies, I should have posted a link in the original post sorry! http://chdk.wikia.com/wiki/UBASIC/Scripts:_HDR_with_stacking

This is the script I'm talking about, I would like to take more than the 3 bracketing photos that the sx40 has built in

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Offline msl

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Re: HDR with stacking script help
« Reply #5 on: 21 / September / 2012, 04:02:46 »
This script simulate key clicks on the camera for changing the Ev values. It can only be used for certain cameras.

As proposed you should use the built in bracketing function of CHDK (not the camera function). With this function you can take more than 3 photos. Make a Tv bracketing.

Simple Ev Bracketing scripts have the disadvantage,  that exposure times > 1 s are not possible with the Canon cam. If you use more than 3 pictures the probability is high, that you need a exposure time > 1 s.

msl
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Offline brizo

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Re: HDR with stacking script help
« Reply #6 on: 21 / September / 2012, 07:21:36 »
thanks for all the help!

Re: HDR with stacking script help
« Reply #7 on: 27 / November / 2012, 20:42:04 »
I wrote a script for this that I use a lot.  I can do HDR with single shots, or set start/end Ev to 0 and set number of shots, I use that for multi-shot denoising.  I've done extreme HDR up to 5 steps and 4 shots each.  4 shots really helps with the noise.  I stack with luminense HDR and it seems to automatically include and average the multiple shots.
Code: [Select]
@title General HDR
@param n = Number of Shots Each
@default n 4
@param x = Tv Start (1 is brighter)
@default x -1
@param y = Tv End
@default y 3
@param z Ev Step Size (1 or 2)
@default z 1
rem note this is halfstep size of other scripts

v=((y-x)+1)/z
w=v*n
print "Total pics:"
print w

print "Stabilize 2s"
sleep 2000

print "Normal"
shoot
set_aflock 1
get_av96 a
get_sv96 s
get_tv96 t

for b=x to y step z
print b
for i=1 to n
print i
set_tv96_direct t-b*96
set_sv96 s
set_av96 a
shoot
next i
next b

set_aflock 0
print "...done"
playsound 3
Name as GenHDR.bas
playsound didn't work on one of my cameras.


 

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