Vision software and documentation for Martti

Documentation

Martti has Captivator PCI card with Bt848 video capture chip. You can capture images with Martti through /usr/include/linux/videodev.h interface. It is part of Video4linux, which is a project to provide a common API to video sources.

Documents available on Web

Vision software

Basic image capturing and bitmap handling

I've developed some basic routines for image capturing and basic bitmap handling, which you can use. With them, it's only possible to capture 640x480 24-bit RGB images, but you can convert them to another formats. If you figure out, how to capture images in another formats (or sizes), please let me know.
You can view the bitmaps with xv on any Linux running X.

Color area detection

Student Software Engineering Project Group called Martti is developing control software for an autonomous robot. Part of the project is developing vision software, which can detect colored landmarks in test environment.

Older stuff

Quickly developed capturePicture program, for basic capturing.
Example image:

Picture 0 (JPG) (24-bit bitmap)

Grapper Information

Through videodev.h-library you can get some information about frame grapper.
grapperInfo-program prints some information about grapper onto screen. You can also find the program in Martti at /home/ttkurppa/vision/info/.
Output of the grapperInfo:


Video capabilities:
 name: BT848(Hauppauge old)
 type: 239 ,which means
  Can capture: yes
  Can tune: yes
  Does teletext: yes
  Overlay onto frame buffer: yes
  Overlay by chromakey: no
  Can clip: yes
  Uses the frame buffer memory: yes
  Scalable: yes
  Monochrome only: no
  Can capture subareas of the image: no
 channels  : 3
 audios    : 3
 maxwidth  : 768
 maxheight : 576
 minwidth  : 32
 minheight : 32
----------------------------
Channel Information:
 Channel 0
  Name  : Television
  tuners: 1
  flags : 3 ,which means
   Channel has a tuner: yes
   Channel has audio: yes
  type  : 1 ,which means TV
  norm  : 1
 Channel 1
  Name  : Composite1
  tuners: 0
  flags : 2 ,which means
   Channel has a tuner: no
   Channel has audio: yes
  type  : 2 ,which means CAMERA
  norm  : 1
 Channel 2
  Name  : SVHS
  tuners: 0
  flags : 2 ,which means
   Channel has a tuner: no
   Channel has audio: yes
  type  : 2 ,which means CAMERA
  norm  : 1
----------------------------
Picture properties (current setting):
 brightness: 32768
 hue       : 32768
 colour    : 32512
 contrast  : 27648
 whiteness : 0
 depth     : 0
 palette   : 3 ,which means: 565 16 bit RGB
----------------------------
Overlay window properties (current setting):
 x     : 0
 y     : 0
 width : 768
 height: 576
 chromakey: 0
 flags    : 1
 clipcount: 3
----------------------------

Teemu Kurppa

Department of Computer Science

Department information