Editing N900 VGA camera

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==Hardware==
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The front camera is a VGA camera from ST microelectronics.
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The [[Nokia N900|N900]] front camera is a VS6555 VGA camera from ST Microelectronics.
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The [http://www.alldatasheet.com/datasheet-pdf/pdf/206482/STMICROELECTRONICS/VS6555.html datasheet] lists the following specs.
The [http://www.alldatasheet.com/datasheet-pdf/pdf/206482/STMICROELECTRONICS/VS6555.html datasheet] lists the following specs.
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* Size: 4.5×4.5×2.5 mm
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* Size: 4.5*4.5*2.5mm
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* Resolution: 640×480
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* Resolution: 640*480
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* minimum illumination 7 lux
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* minimum illumination 7 lux.
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* SNR at 100 lux 34 dB
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* SNR at 100 lux 34dB
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* Field of view: 66 degrees horizontal, 78 degrees diagonal
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* Field of view: 66 degrees horizontal, 78 degrees diagonal.
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This is connected via a multiplexor to the single camera bus on the CPU, along with the main camera. The two cannot be used concurrently.
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==Software==
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The driver presents the camera as a video4linux device - <code>/dev/video1</code>.
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This camera had severe performance problems under the original software release. (PR1.0)
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With [[Maemo 5/PR1.1|PR1.1]], released in January 2010, in very good light, the picture was acceptable. In normal room light, the performance remained lower than would be hoped.
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With the release of [[Maemo 5/PR1.2|PR1.2]], this has improved further, being generally adequate.
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Also, with the release of PR1.2, [http://talk.maemo.org/showthread.php?t=53579&highlight=skype+video Skype Video] began to work, using the VGA camera. Little other software uses the front camera - [http://maemo.org/downloads/product/Maemo5/mirror/ mirror] provides a real-time image of what the camera is showing, and [http://maemo.org/packages/view/mplayer/ mplayer] can also use the camera as a video4linux device.
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[[Category:N900]]
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[[Category:n900]] [[Category:n900_Hardware]]
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[[Category:N900 Hardware]]
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