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参数资料
| 型号： | OV09121-C00A |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | OV9625 Color CMOS SXGA (1.3 MPixel) CAMERACHIP OV9121 B&W CMOS SXGA (1.3 MPixel) CAMERACHIP |
| 中文描述： | OV9625彩色CMOS SXGA（1.3万像素）的CameraChip OV9121乙 |
| 文件页数： | 23/30页 |
| 文件大小： | 361K |
| 代理商： | OV09121-C00A |
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Functional Description
Version 1.3, September 15, 2003
Proprietary to OmniVision Technologies
3
Omni
ision
Image Sensor Array
The OV9625/OV9121 sensor is a 1/2-inch format CMOS
imaging device. The sensor contains 1,359,232 pixels.
Figure 3 shows the active regions of sensor array.
Figure 3 Sensor Array Region
The color filters are Bayer pattern. The primary color
BG/GR array is arranged in line-alternating fashion. Of the
1,359,232 pixels, 1,310,720 are active. The other pixels
are used for black level calibration and interpolation.
The sensor array design is based on a field integration
read-out
system
with
line-by-line
transfer
and
an
electronic shutter with a synchronous pixel read-out
scheme.
Gain Control
When the column sample/hold circuit has sampled one
row of pixels, the pixel data will shift out one-by-one into
an analog amplifier. The amplifier gain can either be
programmed by the user or controlled by the internal
automatic gain control circuit (AGC). The gain adjustment
range is 0-24 dB.
Channel Balance
The amplified signals are then balanced with a channel
balance block. In this block, Red/Blue channel gain is
increased or decreased to
match
Green channel
luminance level and gamma correction is performed. The
adjustment range is 54 dB. This function can be done
manually by the user or with the internal automatic white
balance controller (AWB).
R
G
R
G
R
G
R
G
R
G
R
G
B
G
B
G
B
G
B
G
B
G
B
R
G
R
G
R
G
R
G
R
G
R
G
B
G
B
G
B
G
B
G
B
G
B
R
G
R
G
R
G
R
G
R
G
R
G
B
G
B
G
B
G
B
G
B
G
B
R
G
R
G
R
G
R
G
R
G
R
G
B
G
B
G
B
G
B
G
B
G
B
R
G
R
G
R
G
R
G
R
G
R
G
B
G
B
G
B
G
B
G
B
G
B
R
G
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G
R
G
R
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R
G
B
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B
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B
G
B
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B
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B
R
G
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G
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G
R
G
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G
R
G
B
G
B
G
B
G
B
G
B
G
B
0
1
2
3
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5
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8
9
10
11
1035
1034
1033
0
1
2
3
4
5
1306
1307
1308
1309
1310
1311
Column
Dummy
Optical
Black
Dummy
1032
1024
Active
Lines
R
o
w
10-Bit Analog-to-Digital Converter
The balanced signal then will be digitized by the on-chip
10-bit ADC. It can operate at up to 12 MHz, and is fully
synchronous to the pixel clock. The actual conversion rate
is determined by the frame rate.
Black Level Compensation
After the pixel data has been digitized, black level
calibration can be performed before the data is output.
The black level calibration block subtracts the average
signal level of optical black pixels to compensate for the
dark current in the pixel output. Black level calibration can
be disabled by the user.
Windowing
OV9625/OV9121 allows the user to define window size or
region of interest (ROI), as required by the application.
Window size setting (in pixels) ranges from 2 x 4 to
1280 x 1024 (SXGA) or 2 x 2 to 640 x 480 (VGA), and can
be anywhere inside the 1312 x 1036 boundary. Note that
modifying window size or window position does not alter
the frame or pixel rate. The windowing control merely
alters the assertion of the HREF signal to be consistent
with the programmed horizontal and vertical ROI. The
default window size is 1280 x 1024. See Figure 4 and
registers HREFST, HREFEND, VSTRT, VEND, and
COMM for details. The maximum output window size is
1292 columns by 1024 rows.
Note that after writing to register COMH (0x12) to change
the sensor mode, registers related to the sensor’s
cropping window will be reset back to its default value.
Figure 4 Windowing
Column
End
Sensor Array
Boundary
HREF
HR
E
F
Column
Display
Window
Column
Start
Row Start
Row End
R
o
w
相关PDF资料 |
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|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| OV09215-F48V | 制造商:OMNIVISION 制造商全称:OMNIVISION 功能描述:High-Performance Video for Automotive Vision Applications |
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| OV09625-C00A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:OV9625 Color CMOS SXGA (1.3 MPixel) CAMERACHIP OV9121 B&W CMOS SXGA (1.3 MPixel) CAMERACHIP |
| OV09630-C00A | 制造商:Omnivision Technologies Inc 功能描述:1.3 MPIXEL CAMERA CHIP, 1/3"" |
| OV09655-ECJFAA1A-SR | 制造商:Omnivision Technologies Inc 功能描述:SXGA Camera Evaluation kit USB 2.0 |
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