JAI RM-2040GE Series, Руководство пользователя

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RM/TM-2040GE Series
16 Operation
Table 2
Scan Area Start Points
Scan Area
Start Point Effective Area Frame Rate (FPS)
(Line) (Lines x Pixels) Dual Tap Single Tap
A Full Scan 1 1200 x 1600 34.15 17.084
B Centered 600 Lines 301 600 x 1600 58.69 29.34
C Centered 300 Lines 451 300 x 1600 90.58 45.29
D Centered 150 Lines 525 150 x 1600 122.55 61.27
T Full Scan 2x2 Binning 1 600 x 800 60.99 30.49
U Porgrammable Scan Area 1 — 1200 1 — 1200 x 1600
3.2 Bayer Color Filter (Color Versions)
JAI Inc. AccuPiXEL series color cameras are high-resolution, high-speed progressive scan CCD cameras. The
interline transfer, progressive scan CCD permits full vertical and horizontal resolution of images acquired at
very high shutter speeds. The electronic shutter, which has speeds to 1/16,000 sec., can be reset
asynchronously by external pulse control. Uniform square pixels provide superior image definition in any
orientation. On-chip micro lenses mean increased sensitivity.
3.2.1 Color Filter Array
JAI Inc. AccuPiXEL cameras use Bayer CFA (color filter array) as their standard primary color filter. This filter
provides the most popular color interpolation supported by numerous software suppliers.
The digital format allows the camera to output accurate pixel data, including the color information. When the
data is stored in the frame buffer of a frame grabber or computer, the color information is easily manipulated
to restore the original color images. Because the color filter array contains only a single R, G or B color in each
pixel, the restored image has to fill in colors in the missing pixel locations. The software uses neighboring pixel
information to “guess” the missing colors to make smooth, clear images. This is called “color interpolation.”
Today’s high-speed computers allow such color interpolation to be done almost in real time. Because these
cameras do not contain internal color processing circuitry, they are smaller and less expensive than full-
function color cameras.
3.2.2 Bayer Color Filter Array (CFA)
The Bayer CFA is an R, G, B primary color filter array. This is the most widely accepted CFA for the single-chip
CCD progressive scan format. This type of array layout has a specific order for each color’s pixels. Since the
human eye’s resolution and color recognition are highest at green, the CFA contains two greens per each red
and blue.
It is critical for the frame grabber and color interpolation to know where the individual color pixels exist
relative to sync (LDV and FDV) timing.
This requirement makes digital output the preferred choice, because the timing relationships are very accurate