STH-DCAM U ’ ANUAL Table of Contents Introduction ...3 Quick Start...4 Hardware Overview...5 Hardware Schematic...5 Color and Monochrome...5 Frame Rates ...5 Lenses ...7 Changing Lenses...7 Cleaning the Imagers ...7 Imager Size ...7 F Number...7 Focal Length ...7 Range Resolution...8 Field of View ...8 1394 Interface...9...
IEEE 1394 interface, in both manual and automatic modes. The user can set exposure, gain, binning, etc., or have the stereo head electronics do it automatically. The STH-DCAM uses standard 12 x 0.5 mm miniature lenses for user- changeable optics. Wide-angle to telephoto options are available, depending on the application.
DCAM) or Small Vision System software (see Section 7.2). This is the not-so-quick part of the Quick Start. The STH-DCAM has a single IEEE 1394 port, for plugging in an IEEE 1394 cable. Plug one end of a 6 pin – 6 pin IEEE 1394 cable into the port, and the other end into any port of the host card.
(including camera motion). Typically, the cable is plugged into the host computer IEEE 1394 card. Power for the STH-DCAM is supplied from the card, or through a separate power supply that plugs into the power supply port of the device (7-40 VDC).
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Imager STH-DCAM 1394 imaging Digital Stereo commands Head 1394 Interface Electronics 1394 commands 1394 Digital Cable Figure 3-2 Schematic of the STH-DCAM electronics. Sync signals Right Imager 8-bit pixels 12 MHz per imager 1394 Interface Electronics Digital Video Stream 2001 V...
STH-DCAM U ’ ANUAL 4 Lenses The STH-DCAM uses standard miniature lenses (12 x 0.5 mm). Good- quality, fixed-focus lenses with low distortion and high light-gathering capability are best. Lenses are characterized optically by imager size, F number, and focal length.
STH-DCAM U ’ ANUAL Figure 4-1 Range resolution in mm as a function of distance, for several different lens focal lengths. 4.6 Range Resolution Range resolution is the minimum distance the stereo system can distinguish. Since stereo is a triangulation operation, the range resolution gets worse with increasing distance from the stereo head.
STH-DCAM. 5.1 1394 Cable The STH-DCAM has an IEEE 1394 port on the left side of the device. Plug a cable from the STH-DCAM into a free port on the host controller. The maximum length for such a cable is 4.5 m (about 15 feet). The cable supplies both signals and power to the stereo head;...
Video… menu item. Figure 6-1 shows the dialog. 6.1 Color Color information from the STH-DCAM digital head is input as raw colorized pixels, and converted by the interface library into two Figure 6-1 Video Parameters dialog.
Figure 6-2 Frame size control in the main capture window. 6.5 Frame Rates Frame rates from the STH-DCAM depend on the frame size and color mode. Frame rates can be set under program control with the SetRate() function; see the Small Vision System User’s Manual. For the smallv and smallvcap applications, frame rates are set at 30 Hz.
There are two applications. smallvcap.exe is a GUI-based application that allows the user to exercise the capture functions of the STH-DCAM. It is described in earlier sections of this document. stcap.exe is a simple application that connects to the stereo head and displays stereo images.
It can serve as a template for user programs that integrate stereo capture from the STH-DCAM. libsvscap.so is the capture library for Linux. These libraries must be set to the correct ones for the STH-DCAM. Copy the following files in the bin/ directory: dcamcap.so -> libsvscap.so You can check that the correct interface library is installed, by looking at the information text when the capture application is started.
2001 V STH-DCAM U ’ ANUAL IDERE ESIGN 8 Interface Software API Please see the Small Vision System User’s Manual for information about the software API for capturing and saving images.
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STH-DCAM U ’ ANUAL 9 Technical 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 Interface Type Digital 1394 [Firewire], OHCI compliant Speed Maximum 20 megapixels / second...
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STH-DCAM U ’ ANUAL Stereo module size 6" x 2.6" x 1" Weight (with lenses) 8 ounces 2001 V IDERE ESIGN...
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2001 V STH-DCAM U ’ ANUAL IDERE ESIGN 10 Technical Support For technical support, please contact Videre Design by email or FAX. Videre Design P.O. Box 585 Menlo Park, CA 94026-0585 Fax: (650)323-3646 Email: mclaughl@dnai.com Technical information about stereo algorithms and stereo calibration can be...