G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR

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    G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « on: 18 / August / 2009, 15:07:35 »
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    I'm new to CHDK, and find it a bit overwhelming. I'm looking to do a couple of rather simple things, but can't figure out if CHDK will do this "as-is" or if I need a script.

    I want to shoot a series of bracketed shots altering the shutter speed by a specific  +/- EV setting between each shot for use in compiling an HDR image. The Canon firmware will only do 3 shots, normal exposure, 1 plus, and 1 minus shot at some EV (1/3 to 2). I want to do 5, 7, 9, or more shots at +/- "x"EV (7 would be 1 normal, and 3 over, 3 under). Do I need a script for this, or can CHDK do it as is? If so, please list the steps and menu entries to alter. I would also be nice if the 2 second self time could be triggered before the first shot so there is no camera shake on the first image from pressing the button.

    If this requires a script, once I saw a script that does this I could probably figure out the rest.

    Thanks in advance.

    Jeff

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #1 on: 18 / August / 2009, 15:41:22 »
    No problem.

    Read all of this page http://stereo.jpn.org/eng/sdm/capture.htm

    No script needed.

    David

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #2 on: 18 / August / 2009, 16:00:00 »
    David, I'm afraid this is just as confusing. The page talks about menu items that don't exist.

    Still need help.

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #3 on: 18 / August / 2009, 16:40:45 »
    Go to this page http://stereo.jpn.org/eng/sdm/index.htm and further down you will see all the DISKBOOT.BIN versions for various cameras.

    Assuming that you have a bootable card, replace existing DISKBOOT.BIN with downloaded version.

    If you wish to try other features, such as time-lapse, download Common_files.zip from the same page.


    David


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    Offline fe50

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #4 on: 19 / August / 2009, 02:24:00 »
    @Jeffffff

    In the case you want to do it with CHDK instead of using the Stereo Data Maker (SDM):

    Scriptless Tv bracketing
    SD990 guidance

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #5 on: 19 / August / 2009, 10:02:53 »
    @fe50

    Great! That works. The maximum number of shots on custom timer is 10, but since HDR sequences use odd vales, 9 shots is the max. I doubt I'll need more than 9. That gives me the primary exposure, with 4 overs and 4 unders. With the Canon firmware is was only 1 over 1 under (3 total).

    I'll probably take a peek at that SDM build too out of curiosity.

    Thank you everyone.

    OK, Next...

    I want to dabble with time lapse. The camera has a built in time lapse, but only 1 or 2 seconds between shots. I keep seeing reference to an "Intervalometer". I assume this is a script that allows a more custom control of time settings so I can go above 2 seconds per shot. Is this a script, or built into CHDK? Also, does this create an AVI or movie file, or just take picture files that must be rendered into a movie file? (I saw reference to a program called SUPER that can do this?)

    J

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    Offline fbonomi

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #6 on: 19 / August / 2009, 12:19:40 »
    Quote
    Is this a script, or built into CHDK?

    A script
    Actually there are plenty of them around, going from the simplest to the most complex ones

    Basically, this is a simple intervalometer:

    Code: [Select]
    @title Intervalometer
    @param a delay between shots (sec)
    @default a 1
    let s=a*1000

    :loop
    shoot
    sleep s
    goto "loop"


    This is a complex one:
    http://chdk.wikia.com/wiki/UBASIC/Scripts:_Ultra_Intervalometer

    In both cases, save the code in a file called interval.bas or similar and put it into the CHDK/SCRIPTS folder



    Scripts can be written in ubasic or lua, two different languages (SDM only supports uBasic)

    further reading for ubasic
    http://chdk.wikia.com/wiki/UBASIC/TutorialScratchpad
    http://images2.wikia.nocookie.net/chdk/images/6/6d/UBASIC_User_Guide_D0_4.pdf

    and for LUA:
    http://chdk.wikia.com/wiki/LUA

    Quote
    Also, does this create an AVI or movie file, or just take picture files that must be rendered into a movie file?

    you get pictures that must be assembled.

    Virtualdub is a program commonly used for this.

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #7 on: 19 / August / 2009, 13:56:46 »
    @fbonomi:

    Thanks. I looked at the "complex" script, and loaded it into the camera. Works as advertised. I'm kind of amazed, not that this works, but the capability and programability.

    I already tried modifying the script to tailor it slightly.

    I notice my G9 has a shot cycle time of about 3 seconds. Anyone know how I can lessen this shot-to-shot time? The way it is, setting an interval of one second causes a actual shot-to-shot time of about 4 seconds.

    It would seem I can use the camera itself for 1 or 2 second time lapse, and the script for 4+ seconds. Not that this matters, it's all part of the learning process.

    For time lapse, should I be using the 640x480 mode for images, or use the 12mp sized images? (note: shot-to-shot time the same for either 640 or 12mp).

    Anyone care to chime in on how to use virtualdub to render the movie? The basic steps, so I can get an output movie.

    Thanks


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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #8 on: 19 / August / 2009, 14:41:30 »
    There are plenty of links for using VirtualDub with image sequences.

    Make sure you get a later version that supports image sequence in File\Open video File

    (click the 'Files of type' drop-down menu).

    Save as an AVI file using XVid codec, for example.

    Someone has taken images with SDM at a faster rate than you mention, not sure about CHDK.



    David

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    Re: G9 - Want to shoot 5, 7, 9, 11 bracketed shots for HDR
    « Reply #9 on: 19 / August / 2009, 19:02:27 »
    There are plenty of links for using VirtualDub with image sequences.

    Make sure you get a later version that supports image sequence in File\Open video File

    (click the 'Files of type' drop-down menu).

    Save as an AVI file using XVid codec, for example.

    Can you point me to some links on using Virtualdub in this manner?

    Thanks

     

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