> My main reason for probably wanting to write my own
> app would be to get the user interface I really wanted.
> That could be a wrapper around someone else's low
> level code that converts raw files to arrays of RGB
> pixels with a large set of control parameters, if such a
> thing exists and has the control parameters I want.


For example from (concatenate the url):
http://www.usa.canon.com/consumer/controller?act=SDKHomePageAct&keycode=Sdk_Lic&fcategoryid=314&modelid=7474&id=3464

What are the Canon Digital Camera SDKs?
SDK stands for Software Development Kit. The SDKs for EOS Digital SLRs
and PowerShot compact digital cameras are separate. There are six (6)
current Canon Digital Camera SDK versions:

EDSDK 2.6 Windows version for select EOS Digital SLRs
EDSDK 2.6 Macintosh version for select EOS Digital SLRs
RC-SDK 8.4 Windows version for other EOS Digital SLRs
RC-SDK 8.4 Macintosh version for other EOS Digital SLRs
PS-ReC SDK 1.1.0e Windows version for PowerShot G10, G9, G7, S5 IS, S3
IS, S80, SX110 IS, SX100 IS, A640 and A620
CD-SDK 7.3/RD-SDK 1.1.1 Windows version for select PowerShots
The Canon Digital Camera SDKs comprise a set of APIs, DLLs, and static
link libraries that provide an interface for accessing Canon digital
cameras and data generated by Canon digital cameras.

EDSDK 2.6 Windows and Macintosh version support remote control, RAW
image conversion and downloading from select EOS Digital SLRs with
DIGIC 4, DIGIC III or DIGIC II processors released over the past four
years, starting with the EOS-1D Mark II and continuing through to the
EOS Rebel T1i.

RC-SDK 8.4 (Windows and Macintosh versions) supports remote control,
RAW image conversion and downloading from most EOS Digital SLRs
introduced before the EOS 30D.

PS-ReC SDK 1.1.0e (Windows XP only, Vista not supported) supports
remote control including video out with the PowerShot G10, G9, G7, S5
IS, S3 IS, S80, SX110 IS, SX100 IS, A640 and A620 models exclusively.
(Please note that Canon is no longer updating its SDKs for PowerShot
cameras as of 2009.)

CD-SDK 7.3 (Windows only) supports downloading with all USB PowerShots
released before 6/30/2005. Remote control and video out are supported
with some of these models. Please see the SDK Compatibility Charts for
more information on this topic.

RD-SDK 1.1.1 (Windows only) supports raw image conversion with select
USB PowerShots. Please see the SDK Compatibility Charts for more
information.

All Canon Digital Camera SDK versions are written in C. There are no
current ActiveX versions. Furthermore, there is no explicit support
for other operating systems or development environments including but
not limited to: limited to: Windows XP X64 Edition, Windows CE,
Windows Mobile Edition, Windows Media Center, Linux, Sun, Unix,
HP-Unix, OS/2, Free BSD, Java, Cocoa, etc. Canon Inc. has indicated no
plans to develop SDKs for any of these operating systems or
development environments.

Additionally, please note that as per the current SDK License
Agreement, the Canon Digital Camera SDKs are offered as is, without
technical support. However, the current SDKs are provided with written
documentation as well as several tutorials and sample files. The
sample code is available exclusively for Microsoft Visual C++ 6.0.
Canon Inc. has informed us that they will no longer supply sample code
for Microsoft Visual Basic or other development applications.
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