The Model 2255 frame grabber accepts NTSC or PAL video on 4 composite inputs. Digitized images are sent to the host computer via USB 2.0 high-speed interface. A variety of output formats supported by the 2255 eliminates the need for format conversions in a wide range of applications. Supported formats are:
- RGB packed (24 bits/pixel, bitmap compatible)
- YCrCb packed (16 bits/pixel, YUY2 compatible)
- YCrCb planar (16 bits/pixel, optimal for image processing)
- Y8 (8 bits/pixel, monochrome).
Low Latency
The 2255’s allows fast visual feedback because of its low latency. Its internal DSP optimizes the four data streams for efficient USB 2.0 communication. The Windows drivers are also optimized for low latency. The overall latency is no more than 50 ms for NTSC and 60 ms for PAL.
Deinterlacing
Model 2255 performs optional deinterlacing of interlaced video to reduce motion artifacts on captured images. The lines of one of the fields of video are recreated from those of another field by using interpolation. This method provides better visual quality compared to simple line doubling. Since the deinterlacing is performed by the firmware running on the DSPs, it slows the capture rate down slightly. A visual example is provided here.
JPEG Compression
An optional firmware file is available for purchase that enables hardware JPEG compression on the 2255. The optional firmware allows JPEG capture at 30 fps for 2 channels, or 4 channels at 15 fps. The standard free SDK will allow a user to preview the JPEG capture capability but adds a black bar across the image. Standard uncompressed features are fully supported by our standard SDK.
Accessories
The 2255 is also available with a PC expansion bracket, Model 2255S-PC.
Software and Manuals
The 2255 was designed primarily for OEMs who integrate it with their application software using the Software Development Kit (SDK) available for download below. The application programming interface (API) is extremely simple and intuitive. Buffers for captured images are allocated in the application, and then registered with the driver, which simplifies integration with 3rd party image processing software. The SDK comes with a demo application, which illustrates the use of the API and includes a feature that allows snapshot capture and storage.
Our Linux
SDK includes a fully functional Video 4 Linux (V4L2) driver for the latest Linux kernel, 2.6.24.
Support & Drivers for Windows XP, Vista 32/64, & Windows 7 32/64.
JPEG Compression
An optional firmware file is available for purchase that enables hardware JPEG compression on the 2255. The optional firmware allows JPEG capture at up to 60 total frames per second from all channels, or 2 channels at 30 fps, or 4 channels at 15 fps. The standard free SDK will allow a user to preview the JPEG capture capability but adds a black bar across the image. Standard uncompressed features are fully supported by our standard SDK.
Specifications
Systems requirements are USB 2.0 high-speed port and PIII-700MHz or equivalent. Faster CPU is recommended for applications where heavy image processing is performed.
| Function |
| Inputs |
4 composite (BNC), 75 Ohm |
| Input Video Formats |
NTSC (M), PAL (BDGHIMN) |
| Output Resolution |
NTSC: 640 x 480, 320 x 240, 640 x 240. | PAL: 704 x 576, 352 x 288, 704 x 288 |
| USB Current Draw |
400 mA |
| Weight |
2255S (with Enclosure) 0.5840 lbs | 2255 (without Enclosure) 0.2456 lbs |
Images and Mechanical Drawings
Prices
| Model 2255S |
USB Frame grabber with Enclosure (shown above) |
Qty. 1 $515 |
Qty. 2-9 $468 |
| Model 2255 |
USB Frame grabber without Enclosure |
Qty. 1 $467 |
Qty. 2-9 $424 |
| Model 2255S-PC |
USB Frame grabber without Enclosure with bracket |
Qty. 1 $487 |
Qty. 2-9 $444 |
| Model SDK2255-E |
Optional JPEG encoding firmware for 2255 |
Qty. 1$ 500 - one time licensing fee |
| Model 2250C1 |
USB Cable 1 meter (supplied with the 2255S only) |
Qty. 1$ 3 |
Qty. $3 |
