Stereo Data Maker - Canon CHDK Quick Start Manual

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The A640, A700, A710, G7, IXUS700, A570 (by Rossig/MX3) and IXUS800 were soon supported and
new video features added.
Tv bracketing in continuous-shooting mode, long-exposure feature by Fingalo and A560 support
followed. The first cameras to be supported were all based on the Canon Digic II processor using the
® ®
VxWorks operating system. Later 'hacks' included Digic III cameras with VxWorks or DRYOS
® ® ® ®
operating system. Richard Lemieux investigated the limited accuracy of the camera's distance reading.
ewavr (aka 'Zosim') had already discovered how to read the memory-mapped hardware registers that the
camera's keys, SD card status and USB-connection status were connected to.
On certain cameras, it was then possible for the software to prevent the camera going into download
mode when a voltage (+3 to +5V) was applied to the USB connection (by plugging into the PC, for
example). The USB status could be read like any key on the camera. This feature was included in the
SDM and Fingalo builds and this release of SDM takes the concept further by allowing two cameras to be
highly synchronized for stereo photography. New cameras were ported, the original WIKI transferred to
the current one and in November 2007 a CHDK forum opened to continue discussion outside of 'DP
Review'. At the end of December 2007, discussion transferred to the 'CHDK Forum'.

Stereo Data Maker

(SDM)
-
Yahoo StereoData Maker Group : http://tech.groups.yahoo.com/group/StereoDataMaker
A customized CHDK with features designed for making 3D-Stereo images. (As well as numerous
features for 2D photography). It provides on-screen (EVF/LCD) stereo information and can save the
accompanying stereo-image's data to different file-types. See:- for a
http://stereo.jpn.org/eng/index.html
myriad of support programs for creating and displaying stereo images made with SDM-CHDK (Stereo
Data Maker CHDK). MX3's Motion Detection feature (see below) is also included together with script
commands for controlling the LEDs, all of Fingalo's build 124 features, ewavr's Video Compression and
USB 'cable release'. A560, A570,G7, IXUS700 (SD500) and IXUS800 (SD700) builds are also provided.
all the features of Fingalo 128 and selected features from the AllBest builds.
The website includes a design for electronics that enables full-speed continuous-mode synchronized
stereo shooting with external flash at shutter speeds up to 1/1000 sec.
Other features are :-
Drift-free synchronization at up to 1/20,000 sec with twinned-cameras for virtually no additional cost.
No hardwiring required and no vulnerable external equipment.
Single-shot, delayed single-shot and full-speed continuous-mode synchronized-shooting with external
flash at shutter-speeds up to 1/1000 sec.
Synchronizing of any number of multiple cameras with fixed or progressive flash-delay.
Overriding of shutter-speed to provide values from 65 seconds to 1/40,000 sec in 1/3EV increments.
On-screen-display options include two 'Rangefinder' modes that allow you to set the near and far-point
distance by using the lens telephoto setting as a rangefinder.
The resulting scene-deviation is then displayed as a horizontal bar-graph .. coloured red if it exceeds your
maximum-permissible deviation and required-aperture is indicated.
<ALT> + <FuncSet> then moves lens to calculated optimum-focus for the subject-range.
'Get image-stack' in continuous-shooting mode acquires images at varying focus positions for creating
extended depth-of-field images. 'Show SDM Configuration' for quick overview of settings.
On-screen displays individually enabled and all enabled displays toggled on/off by shutter half-press +
key_right.
Thanks to David - Microfunguy