HDR with stacking script help

brizo

15

« on: 20 / September / 2012, 13:36:54 »

Advertisements

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

Logged

Microfunguy

4037

Re: HDR with stacking script help

« Reply #1 on: 20 / September / 2012, 14:52:51 »

Quote from: brizo on 20 / September / 2012, 13:36:54

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.

Logged

msl

1280
A720 IS, SX220 HS 1.01a

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

Logged

CHDK-DE: CHDK-DE links

waterwingz

12140

Re: HDR with stacking script help

« Reply #3 on: 20 / September / 2012, 16:49:47 »

Quote from: msl on 20 / September / 2012, 14:58:15

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.

Logged

Ported : A1200 SD940 G10 Powershot N G16

brizo

15

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

Logged

msl

1280
A720 IS, SX220 HS 1.01a

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

Logged

CHDK-DE: CHDK-DE links

brizo

15

Re: HDR with stacking script help

« Reply #6 on: 21 / September / 2012, 07:21:36 »

thanks for all the help!

Logged

jmac698

138

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.

Logged