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參數(shù)資料
| 型號： | VV5410 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Mono and Colour Digital Video CMOS Image Sensors |
| 中文描述： | 莫諾和數(shù)字視頻彩色CMOS圖像傳感器 |
| 文件頁數(shù)： | 18/105頁 |
| 文件大?。?/td> | 489K |
| 代理商： | VV5410 |
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VV5410 & VV6410
Black Offset Cancellation
cd5410-6410f-3-0.fm
Commercial in confidence
18/105
4.
In order to produce a high quality output image from VV6410 it is important to maximise the dynamic range of the video output.
This can be achieved by accurately controlling the video signal black level. Within the sensor array of VV6410 there are a number
of lines that are specified to be black, that is they are exposed to the incident light but they are always held in minimum exposure.
VV6410 also has a number of dark lines, that is lines that are integrated for the same length of time as the visible lines but the
pixels within these dark lines are shielded from incident light by an opaque material (e.g. metal 3). The diagram below shows
where the different types of lines that appear within the full array.
Black Offset Cancellation
VV5410/VV6410 can perform automatic black offset cancellation. VV5410/VV6410 contains an algorithm that monitors the level
of the designated black pixels and applies a correction factor, if required, to provide an ideal black level for the video stream.
The user can control the application of the offset cancellation parameter. The internally calculated offset can be applied to the
video stream or alternatively an externally calculated offset can be applied or finally there is the option of applying no offset at all.
Details of how to select the aforementioned modes can be found in subsubsection 9.5.5.
The black offset cancellation algorithm accumulates data from the centre 2 of the 4 physical black lines. The internal cancellation
algorithm uses a leaky integrator model to control the size of the calculated offset. The leaky integrator model takes as input the
current offset plus a shifted version of the error between the ideal black level and the current offset. The magnitude of the shift in
the error is programmable. It is also possible to control the range of pixel values that will inhibit a change in the calculated offset.
A narrow band (128 +/- 2 codes) or a wide band (128 +/- 4 codes) can be selected. If the latter is selected and the pixel average
Figure 11 : Physical position of Black and Dark Lines
364 pixels
Dark Lines
Black Lines
Visible Pixel Array
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VV5430C001 | Monochrome Analog Output CMOS Image Sensors |
| VV5430 | Integrated CMOS Image Sensor with support for ADC and external control via serial interface |
| VV6410C036 | DUAL-MODE DIGITAL CAMERA CHIPSET |
| VV6410 | XTAL MTL T/H HC49/US |
| VV6444 | Low Cost Digital Camera (LCDC) Chipset |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VV5410C036 | 制造商:STMicroelectronics 功能描述:IMAGE SENSOR MONOCHROME CMOS 352X288PIXELS 36CLCC - Bulk |
| VV5430 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Integrated CMOS Image Sensor with support for ADC and external control via serial interface |
| VV5430C001 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Monochrome Analog Output CMOS Image Sensors |
| VV5501C001 | 功能描述:視頻 IC Monochrome Sensor RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| VV5F3-30-041 | 制造商:SMC Corporation of America 功能描述:Manifold Base for VF series, base mt, 1/4 inch |
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