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SOYO STH-DCAM manual

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Table of contents for the manual

  • Page 1

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN STH-DCAM Stereo Head User’s Manual Updated – Rev 2  2001 Videre Design 1[...]

  • Page 2

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN Table of Contents 1 Introduction ...........................................................................................3 2 Quick Start .............................................................................................4 3 Hardware Overview..........................................[...]

  • Page 3

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 1 Introduction The STH-DCAM (Dual-DCAM) is a co mpact, low-power digital stereo head with an IEEE 1394 digital inte rface. It consists of two VGA (640x480), progressive scan CCD imagers and associated IEEE 1394 electronics, mounted in a ri gid, m illed Delrin frame. The CCD imagers are Sony HAD [...]

  • Page 4

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN Figure 2-1 Video capture program window. 2 Quick S t art The STH-DCAM comes assem bled, with 3.6 m m lenses as st andard. To set up and test the STH-DCAM, yo u will need the following: 1. Host computer wit h a 1394 PCI or PCMCIA card, OHCI compliant. 2. 1394 6-pin cable. 3. Capture software or S[...]

  • Page 5

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 3 Hardware Overview Figure 3-1 shows the hardware configuration of the STH-DC AM. The imager module has a m illed Delrin fram e that rigidly holds two Sony HAD CCD color imagers, separated by a fixed distance of 9 cm. Lens mounts are attached to the frame, and standard m iniature lenses are scre[...]

  • Page 6

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 6 Frame Size Frame rate, monochrome Frame rate, color 30 Hz 30 Hz 15 Hz 15 Hz 640x480 7.5 Hz 7.5 Hz 30 Hz 30 Hz 15 Hz 15 Hz 320x240 7.5 Hz 7.5 Hz Table 3-1 Supported frame rates for the STH- DCAM, 400 Mbps IEEE 1394 bus. Left Imag er Right Imag er 1394 Interface Electronics Sync signals 8-bit pi[...]

  • Page 7

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 4 Lenses The STH-DCAM uses standard m iniature lenses (12 x 0.5 mm ). Good- quality, fixed-focus lenses with low distortion and high light-gatherin g capability are best. Lenses are characterized optically by imager size, F num ber, and focal length. Following subsecti ons discuss the choice of [...]

  • Page 8

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 4.6 Range Resolution Range resolution is the m inim um distance t he stereo system can di stinguish. Since stereo is a triangulation operation, the range resol ution gets worse with increasing distance from the st ereo head. The relationship is: d bf r r ∆ = ∆ 2 , where b is the b aseline be[...]

  • Page 9

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 5 1394 Interface Digital image information is transferred fro m the STH-DCAM to the host PC via an IEEE 1394 cable. The cable sends a video stream from the imagers to the PC, and sends com mands from the PC to the stereo head to control exposure, color balance, etc. The cable also supplies power[...]

  • Page 10

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 6 User Controls The CCD imagers are fully controllabl e via the IEEE 1394 interface. User programs ma y input color images, se t video digitization param eters (exposure, gain, red and blue balance), and frame size. All of these parameters can be set with the included capture application, or wit[...]

  • Page 11

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN Both imagers are treat ed in exactly the same manner. It is not possible to set a different exposure or gain on each imager. Figure 6-2 Frame size control in the main capture window. Digitization control can operate in either manual or automatic mode. Refer to Figure 6-1 for the controls in t he[...]

  • Page 12

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 7 Inst alling the 1394 Host Card and Capture Sof tware The STH-DCAM connects to a host co mputer via a digital 1394 interface. The host PC must have a 1394 port, and software to interface to the video stream from the cam era. This interface software presents the video stream from the 1394 hardwa[...]

  • Page 13

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 7.2.2 Linux Installation To install the software under Linux, untar the file svscap22X.tgz in a new directory, which will beco me the top-level directory of the software. Add bin/ to your LD_LIBRARY_PATH variabl e. The directory structure for the software is: bin/ smallvcap stcap libsvscap.so pi[...]

  • Page 14

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 8 Interface Sof tware API Please see the Small Vision Syst em User’s Manual for i nformation about the software API for capturing and saving images. 14[...]

  • Page 15

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 9 T echnical Specifications 9.1 Geometry Housing Rigid milled Delrin frame Baseline 9 cm, fixed Imager size 1/4 inch diagonal Lens type 12 mm miniature, interchangeable 9.2 Interface Type Digital 1394 [Firewi re], OHCI compl iant Speed Maximum 20 me gapixels / second Host interface Any 1394 OHCI[...]

  • Page 16

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN Stereo module size 6" x 2.6" x 1" Weight (with lenses) 8 ounces 16[...]

  • Page 17

    STH-DCAM U SER ’ S M ANUAL  2001 V IDERE D ESIGN 10 T echnical Support For technical support, please contact Videre Design by emai l or FAX. Videre Design P.O. Box 585 Menlo Park, CA 94026-0585 Fax: (650)323-3646 Email: mclaughl@dnai.com Technical information about st ereo algorithms and st ereo calibration can be found at www.ai.sri.com/~kono[...]