Iv-S20 Features - Sharp IV-S20 User Manual

Overview

[2] IV-S20 features

(1) Gray scale search using normalization correlation
The IV-S20 processes 256 gray level images using template matching
with normalization correlation. This improves inspection and measure-
1
ment precision without being affected by variations in lighting.
(2) Sub-pixel level precision
When the IV-S20 looks for the position of an object using gray scale
search function, it can calculate a finer position than the actual CCD
pixel size by interpolation to achieve sub-pixel scale precision.
(3) Simultaneous shutter triggering of two cameras
When a trigger signal is input, two cameras will start
their shutter operation at the same time, and transfer
the captured image signals at the same time. This can
reduce the total processing time for taking simulta-
neous pictures of moving objects.
(4) 8 kinds of integrated measuring programs, including measurement and inspection functions
The IV-S20 integrates the following measurement programs: Positional deviation, absolute position
measurement, matching level inspection, distance and angle measurement, lead inspection, area
measurement by binarization, counting by binarization, labeling measurements by binarization, and
point measurements. The IV-S20 can process any three measurements from 7 programs, plus po-
sitional deviation and absolute position measurements, with one scanned image.
(5) Binarization processing is effective in controlling variations in brightness
Since the binarization process employs a brightness level monitoring function, the threshold value
will follow variations in brightness.
(6) Image pre-processing and binary noise elimination function
In order to process images precisely and reliably, the binarization process uses edge emphasis,
edge extraction, and leveling operations. To eliminate noise, "binary increase _ decrease," "de-
crease _ increase," and "area filters" are available.
(7) Rotation correction
Rotation correction determines the angle for correction by locating two points with a gray scale
search and edge detection.
(8) Calculation between images
Calculation of difference between images captured by camera 1 and camera 2, and calculation of
differences between a stored standard image and captured images are both possible. Subtraction
and absolute difference in value can be used for calculation.
(9) Integrated PC function
The integrated calculation functions of a programmable controller are included so that the IV-S20
can directly output detection and measurement results after calculation external equipment. This
can greatly reduce the total processing time and produce cost savings when setting up a system.
(10) High speed programless communication
The IV-S20 has a computer link function and general-purpose serial communication function for
communication with external devices. It can have a user settable communication speed up to 115.2
kbps, which contributes to increased processing speed for the whole system.
The computer link function can write the measurement results to an external programmable control-
ler register without any programing.
Using the general-purpose serial communication function, the IV-S20 can execute commands from
a host computer, and return the result to the host computer.
(11) Compact
The IV-S20 can be connected to a maximum of two cameras. It is the smallest image processing
system in the industry with the dark and light processing capabilities (as of August 1998).
(12) Simultaneous display of two screens
The screen can display two images from two cameras alternately, or simultaneously by dividing the
screen into two horizontally. When displaying multiple images, each camera image can be posi-
tioned in the upper, middle, or lower views.
(13) Crosshair cursor display
A crosshair cursor is displayed. This cursor is convenient for manual positioning.
(14) Display language changeable between Japanese and English
Menus and other messages displayed on the screen can be switched between Japanese and En-
glish.
Pixel detection
at sub-pixels
Detection point
1-2
256 gray levels
480 pixels 512 pixels
(vertical) (horizontal)
Camera image Image search with
conventional system
Pixel Detection point