OpenQCE stands for "Open QuickCam Express", it intend to drive your Logitech Quickcam Express from OpenBSD userland (using ugen(4)). The Logitech Quickcam Express is a little USB webcam with a 360x296 CMOS sensor (Agilent/HP HSDC1000) and an undocumented STV0600 ASIC. OpenQCE is currently only compatible with one version of this product as I only own one Quickcam Express, I might add support for other webcams in the future. OpenQCE is a cheap and ugly piece of code, I welcome generous donations in good BSD-Licensed code, patches or money.
disclaimer
WARNING: This experiment/code is obsolete and no longer supported, unless you are a developer trying to understand the quickcam express, gtfo. I doubt this still compiles anyway.
documentation
I got most of my information from reverse-engineering and reading websites about similar drivers or similar webcams.
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USB sniffer for Windows 98, 98SE, 2000 and Windows XP (by Benoit PAPILLAULT)
A very convenient tool to sniff usb device and learn how they speak with their drivers.
- Datasheet for HDCS-1020/2020 (8 pages PDF)
- Technical Specification for HP HDCS Family (124 pages PDF)
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Linux driver for Logitech Quickcam Express... (by Georg Acher)
Here is the first attempt to understand this little device, you can get here a few pictures of the chipsets, some registers mapping. If you plan on contributing to OpenQCE, do *NOT* download/read any source code from this website as licenses conflicts.
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RGB "Bayer" Color and MicroLenses (by Silicon Imaging)
Some theory about Bayer filters.
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Digital Camera Sensors tutorial (by Sean T. McHugh)
Some more theory about Bayer filters.
download
Source code: openqce-0.1.tar.gz (10K, MD5: aaf65c7d5588966d8bd8b9f0c13533f9)
faq
What can OpenQCE do:
- Displays what your webcam sees, live with libSDL and X11 or on sequences of pnm files (openqce_shot and openqce_sdl).
- You can specify a delay and let openqce run in the background, it will shoot every x seconds (-p).
- You can select three resolution : 376x312 (with borders), 360x296 and 352x288 (-s).
- You can see raw data from the sensor or a fast interpolated image (-f).
- You can dump all the registers of your webcam (openqce_dump).
What OpenQCE can't do:
- Have a dynamic gain/exposure control.. or even a manual one. For right now it's static and unpractical, it will be fixed in the next version.
- There is no white balance correction.
- It doesn't feature a interpolation-sharpen-killer-filter, picture is good but could be better.
- Save files as .png or .jpg.
- Add text with ttf fonts.
- Interpolate with another png (OSD).