Show pageOld revisionsBacklinksBack to top You've loaded an old revision of the document! If you save it, you will create a new version with this data. Media Files======The Lirec camera & Linux====== The official lirec camera is: * [[http://www.theimagingsource.com/|Imaging Source]] DFK 31AF03-Z ===Getting it working=== * After plugging the camera in, you may need to do: <code> modprobe raw1394 modprobe video1394 chmod 777 /dev/raw1394 chmod 777 /dev/video1394 </code> * Use [[http://damien.douxchamps.net/ieee1394/coriander/|Coriander]] to test the camera To get an image working it's a bit picky - you have to press the buttons in the following order: - In the services tab click 'Receive' at the top - Then in the ISO Control box in the same tab, click 'Start' - Click 'Display' at the top To test OpenCV, install libunicap from [[http://unicap-imaging.org]], then rebuild opencv by rerunning: <code>./configure --use-unicap=yes</code> The examples in libunicap are very useful for debugging, such as device_info, raw_image and sdl_display. There is also an OpenCV example here. ===Getting debayering working in coriander=== - In services tab again, in Format select 'Format_1, Mode_5:1024x768 Mono 8bpp' - In options click Nearest and GBRG - In Trigger you should be able to select 30fps You can also get OpenCV to read from this mode, but it will get the raw image directly. This is where we might need a debayer algorithm. The caminfo for OpenCV I used for the raw image was as follows (I think Marek has a better way): <code> static struct caminfo cameras[] = { { handle: NULL, device_identifier: "Imaging Source DFx 31AF03-Z 1940800048", fourcc: UCIL_FOURCC( 'Y', '8', '0', '0' ), format_size: { 0, 0, 1024, 768 }, window: "Camera 1", image: NULL, properties: camera0_properties, property_count: sizeof( camera0_properties ) / sizeof( unicap_property_t ), cascade: NULL, storage: NULL, }, }; </code> ===Using OpenCV for the debayering=== OpenCV has a built in debayering algorithm, as part of it's colour space conversions. The one which works with the lirec camera is: <code>cvCvtColor(bayerimage, rgbimage, CV_BayerGB2RGB);</code> Where the input is a 1 channel image and the output is 3 channel RGB image. =The bayer pattern image, raw data from the camera CCD= {{:lirec:bayerpattern.png|}} =Converted to RGB= {{:lirec:bayerrgb.png|}} Please fill all the letters into the box to prove you're human. Please keep this field empty: SavePreviewCancel Edit summary Note: By editing this page you agree to license your content under the following license: CC Attribution-Share Alike 4.0 International lirec/firewire_camera_notes.1241786969.txt.gz Last modified: 2009-05-08 12:49by davegriffiths