N900 VGA camera
m (N900 Hardware VGA Camera module moved to N900 Hardware VGA Camera: better name) |
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The [[Nokia N900|N900]] front camera is a VGA camera from ST microelectronics. | The [[Nokia N900|N900]] front camera is a VGA camera from ST microelectronics. | ||
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. | ||
| - | * Size: 4.5 | + | * Size: 4.5×4.5&×2.5 mm |
| - | * Resolution: | + | * Resolution: 640×480 |
* minimum illumination 7 lux. | * minimum illumination 7 lux. | ||
| - | * SNR at 100 lux | + | * SNR at 100 lux 34 dB |
* Field of view: 66 degrees horizontal, 78 degrees diagonal. | * Field of view: 66 degrees horizontal, 78 degrees diagonal. | ||
This is connected via a multiplexor to the single camera bus on the CPU, along with the main camera. The two cannot be used at once. | This is connected via a multiplexor to the single camera bus on the CPU, along with the main camera. The two cannot be used at once. | ||
| - | =Software= | + | ==Software== |
| - | The driver presents the camera as a video4linux device - /dev/video1. | + | The driver presents the camera as a video4linux device - <code>/dev/video1</code>. |
This camera had severe performance problems under the original software release. (PR1.0) | This camera had severe performance problems under the original software release. (PR1.0) | ||
| - | With 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. | + | 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. | ||
| - | + | 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]] | [[Category:N900]] | ||
[[Category:N900 Hardware]] | [[Category:N900 Hardware]] | ||
Revision as of 14:31, 9 June 2010
Hardware
The N900 front camera is a VGA camera from ST microelectronics.
The datasheet lists the following specs.
- Size: 4.5×4.5&×2.5 mm
- Resolution: 640×480
- minimum illumination 7 lux.
- SNR at 100 lux 34 dB
- Field of view: 66 degrees horizontal, 78 degrees diagonal.
This is connected via a multiplexor to the single camera bus on the CPU, along with the main camera. The two cannot be used at once.
Software
The driver presents the camera as a video4linux device - /dev/video1.
This camera had severe performance problems under the original software release. (PR1.0) With 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.
With the release of PR1.2, this has improved further, being generally adequate.
Also, with the release of PR1.2, Skype Video began to work, using the VGA camera. Little other software uses the front camera - mirror provides a real-time image of what the camera is showing, and mplayer can also use the camera as a video4linux device.