596-597 Single Channel Color
11/11/02
4:31 PM
Page 596
Single-Channel Color or Monochrome
Image Acquisition
Single-Channel Color or Monochrome
Image Acquisition
NI 1411
• Color or monochrome acquisition
• 1 NTSC, PAL, S-Video, RS-170, or
CCIR input
• Onboard real-time HSL color
conversion for fast color matching
• Partial image acquisition with
onboard programmable region
of interest
• Onboard pixel decimation
• Programmable gain and offset
• 3 by 8-bit RGB look-up table
• 1 external trigger/digital I/O line
• Transfer rates up to 132 Mbytes/s
Operating Systems
• Windows 2000/NT/XP/Me/9x
Recommended Software
• LabVIEW
• Measurement Studio
• Vision Development Module
- IMAQ Vision
- NI Vision Builder
Other Compatible Software
• C/C++
Driver Software (included)
• NI-IMAQ
Models
• NI PCI-1411
• NI PXI-1411
Overview and Applications
For high-quality analog color image acquisition at an affordable
price, National Instruments offers the NI 1411 Series, which
consists of PCI and PXI plug-in image acquisition devices that
accept analog video input from standard color or monochrome
cameras. These devices come with easy-to-use image acquisition
driver software. Unlike multimedia “frame grabbers”, the NI 1411
Series features increased image processing throughput, such as
on-the-fly color conversion to HSL and partial image acquisition
with programmable region of interest.
In addition, NI-IMAQ controls the NI
1411 digital I/O line.
INFO CODES
For more information,
or to order products
online visit
ni.com/info
and enter:
pci1411
pxi1411
Performance Gains with
Partial Image Acquisition
The NI 1411 Series includes features
that improve overall image acquisition
and image processing speed. You can
Vision
BUY ONLINE!
choose to acquire only a portion
of the image using the onboard
programmable ROI feature. You can configure the size of the
acquired image using Measurement & Automation Explorer, or use
the ROI tools in the NI-IMAQ driver software to transfer only a
subset of the image to PC memory for processing. Partial image
scanning results in fewer pixels to process. For example, using
partial image scanning, you can reduce a 640 by 480 image to a
400 by 400 image and increase your processing speed by
operating on 48 percent fewer pixels.
Real-Time Color Conversion
Real-time color conversion is especially useful for high-speed color
matching in industrial or scientific applications, even in varying
illumination. An example of HSL in action is using color to inspect
the presence of an object even though there are shadows and/or
reflections. Lighting variations do not affect the image (hue). Use
the powerful color matching functions in IMAQ Vision to locate
objects quickly and accurately with the onboard HSL conversion.
Easy-to-Use Driver Software
National Instruments NI-IMAQ driver level software offers the
most comprehensive software interface for image acquisition.
NI 1411 Series devices are shipped with the NI-IMAQ image
acquisition driver software and National Instruments
Measurement & Automation Explorer for easy configuration of
NTSC and PAL color cameras. Using NI-IMAQ, you can quickly and
easily start your application without having to program at the
register level. You can program your image acquisition application
in LabVIEW, LabWindows/CVI, and Measurement Studio.
Color Image Acquisition Performance Gains
with Onboard Decimation
Onboard decimation also provides image acquisition and
processing performance gains by allowing onboard scaling or
decimating of the image without using the PC processor. Onboard
decimation scales the image by removing every second, fourth, or
eighth pixel (powers of two only). By reducing the number of pixels
(decimation) on the IMAQ board, the system has fewer pixels to
process with the PC processor. If you remove every other pixel
using onboard decimation, the image size decreases by
50 percent, which speeds up your processing.
596
National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • info@ni.com • ni.com
596-597 Single Channel Color
11/11/02
4:31 PM
Page 597
Single-Channel Color or Monochrome
Image Acquisition
Single-Channel Color or Monochrome
Image Acquisition
Hardware
PCI Interface
The PCI bus is the electrical interface for both the NI PCI-1411 and
NI PXI-1411. The National Instruments custom MITE ASIC for
interfacing to the PCI bus offers the highest image acquisition
performance available. The MITE ASIC can transfer data at a
maximum sustained rate of 100 Mbytes/s in master mode to
maximize the use of the available PCI bandwidth.
saturation, and luminance (HSL) image planes. Because the hue
plane is effective for analyzing images in which shadows and
lighting gradients are present, the NI 1411 Series makes inspection
systems more reliable. With these devices, industrial inspection
and scientific imaging developers can increase the reliability and
performance of numerous applications, including inspecting light
emitting diodes (LEDs), fabric and textiles, color paint and powder,
pharmaceutical blister packs, and difficult to light applications.
Onboard Memory
The NI 1411 Series has 16 MB of onboard memory, useful for
temporary storage of images being transferred to the PCI bus.
Color Pattern Matching
Use color pattern matching to locate quickly known reference
patterns, or fiducials, in a color image. With color pattern matching,
you create a model or template of an object. The search tool first
scans the image to match the color distribution, then scores the
match for shape. The score relates to how closely the model
matches the pattern found. You should use color pattern matching
to locate reference patterns that the color and spatial information in
the pattern fully describe. Color can often simplify a monochrome
problem by improving contrast or separation.
Trigger and Strobe
You can use the digital I/O line as an input to trigger image
acquisition or as an output to control solenoids, solid-state relays,
or strobes.
Programmable Gain and Offset
The NI 1411 Series has programmable gain and offset circuitry for
optimizing the input signal range.
Ordering Information
I/O Connector and Cabling
Two external BNC connectors are used for the video source and
digital I/O line. Each product shipment includes a 2 m BNC cable.
NI PCI-1411 ......................................................777857-01
NI PXI-1411 ......................................................778006-01
Includes the NI 1411 hardware, NI-IMAQ for Windows 2000/NT/XP/Me/9x,
and a 2 m IMAQ-BNC-1 cable.
Applications
Vision
Vision
The NI 1411 devices offer machine vision developers real-time
color conversion of NTSC, PAL, and S-Video formats to the hue,
Specifications
Typical for 25 ˚C unless otherwise noted.
Gain and Offset
Brightness, contrast, saturation, and hue controls
External Synchronization and Trigger Signals
30
25
30
25
frames/s
frames/s
frames/s
frames/s
Trigger sense .............................................
Trigger polarity ..........................................
Pulse width ................................................
VIH (TTL) ....................................................
VIL (TTL).....................................................
TTL
Programmable (positive or negative)
20 ns minimum detectable
2V
0.8 V
Supported Formats
NTSC composite or S-video.......................
PAL composite or S-video..........................
S-Video NTSC.............................................
S-Video PAL ...............................................
Video Inputs
Video 0 .......................................................
Video 1 .......................................................
Input impedance ........................................
Input range (black to white) .......................
Single-ended BNC for CVBS
Single-ended S-Video (Y/C)
All 75
Ω
±1%
700 mV (calibrated) or 400 mV
to 1.00 V (variable gain)
Pixel Clock (square pixel sampling rate)
Internally generated for square pixels mode
NTSC ..................................................... 12.27 MHz
PAL ........................................................ 14.75 MHz
Bus interface.............................................. Master, slave
Bus-master performance ........................... 100 Mbytes/s (sustained)
Accuracy
Luma gain .................................................. ±2.5% of reading
Chroma gain............................................... ±2.5% of reading
Power Requirements
+5 VDC (±5%) ........................................... 1.25 A
±12 VDC (±5%) ......................................... <100 mA
Output Formats (Square Pixels)
RGB (Red, Green, Blue) .............................
HSL ............................................................
H, S, or L....................................................
LUT ............................................................
3 by 8 = 24-bit
3 by 8 = 24-bit
8-bit
3 by 8 bit (RGB only)
Physical
Dimensions
PCI ......................................................... 10.7 by 17.5 cm (4.2 by 6.9 in.)
PXI ......................................................... 10 by 16 cm (3.9 by 6.3 in.)
Environment
Operating temperature .............................. 0 to 55 ˚C
Storage temperature.................................. -20 to 70 ˚C
Relative humidity ....................................... 5 to 90%, noncondensing
Color Decoding
NTSC/PAL .................................................. Luma/Chroma COMB, Notch, or
optional filters for Peaking
National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • info@ni.com • ni.com
597
模拟与混合信号
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
