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參數(shù)資料
| 型號： | MCM20014IBB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | 1/3” Color VGA Digital Image Sensor |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, CQCC48 |
| 封裝： | CERAMIC, LCC-48 |
| 文件頁數(shù)： | 6/54頁 |
| 文件大小： | 761K |
| 代理商： | MCM20014IBB |
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MOTOROLA
MCM20014
6
incorporating microlens equipped imagers into camera
systems/heads. The fill factor of the pixels without mi-
crolenses is 35%.
Figure 4. Optional on-chip Bayer CFA
Figure 5. Improvement in pixel sensitivity results
from focusing incident light on photo sensitive por-
tions of the pixel by using microlenses.
2.1.3 Frame Capture Modes
Depending on the application the user may choose be-
tween the two available Frame Capture Modes (FCMs).
An overview of the operation of the two modes and sug-
gested guidelines for selection are given in this section.
The default mode of image capture is the Continuous
Frame Capture Mode (CFCM). This mode is most suit-
able for full motion video capture and will yield VGA
sized frame rates up to 36fps at 13.5 MHz MCLK. In this
mode the image integration and row readout take place
in parallel. While a row of pixels is being read out, an-
other row or rows are being integrated. Since the inte-
gration time (T
int
) is equal for all rows, the start of the
integration periods for rows is staggered out. This mode
relies on the integration periods of the rows being long
enough to produce a reasonable overlap of the sequen-
tial rows. If this is not the case then image artifacts may
be produced in instances where the target is moving
very fast or the illumination is varying.
The second available capture mode is called Single
Frame Capture Mode (SFCM). This mode consists of
global integration of all pixels, next a simultaneous
transfer to the Floating Diffusion (FD) node of all pixels
followed by a sequential read out of all rows. This mode
is best suited for still or
“
single snap shot
”
capture of an
image where a flash illumination is utilized.
SFCM should only be used when the ambient lighting
will not cause the pixels to saturate during the readout
time.
The user chooses the scan mode via the
Capture Mode
Control Register, (Table 24), on page 31
.
2.1.4 Image Scan Modes
The MCM20014 has two available image scanning
modes: interlaced and progressive.
Interlacing is a technique used in TV systems that is
used to enhance the vertical resolution of the picture
without increasing the bandwidth of the transmission
system. A spatial offset is introduced on the display sys-
tem between the odd and even fields. An odd field con-
sists of rows 1,3,5,7,9.... while an even field comprises
rows 2,4,6,8..... Since the spatial offset is exactly half
the vertical pitch of the sensor, the even and odd fields
appear interdigitated when displayed on top of one an-
other, thus appearing to improve the sensor
’
s vertical
resolution. By definition two interlaced fields comprise a
frame. It should be noted that at high frame rates, mo-
tion between fields in interlaced video can cause smear
and/or serrations to appear in the image.
Progressive scanning refers to non-interlaced or se-
quential row by row scanning of the entire sensor in a
single pass. The image capture happens at one instant
of time. This mode is primarily used in applications
where vertical resolution is of prime importance and
available bandwidth of the transmission system does
not impose any limitations.
The user chooses the scan mode via the
Sub-sample
Control Register, (Table 25), on page 32
.
2.1.5 Window of Interest Control
The pixel data to be read out of the device is defined as
a
‘
Window of Interest
’
(WOI). The window of interest
can be defined anywhere on the pixel array at any size.
The user provides the upper-left pixel location and the
size in both rows and columns to define the WOI. The
R
R
R
R
G1
G1
G1
G1
G2
G2
G2
B
B B
B
G2
B
B
Iris
microlenses
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相關(guān)代理商/技術(shù)參數(shù) |
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| MCM20014IBMN | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:1/3” Color VGA Digital Image Sensor |
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| MCM20027IBMN | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Color SXGA Digital Image Sensor 1280 x 1024 pixel progressive scan solid state image sensor with integrated CDS/PGA/ADC, digital programming, control |
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