Configure Firefly2 to produce raw Bayer tiled images.
By default, the FireFly2 does not support a mode that is capable of producing Bayer tiled images. It is possible to change a register on the device that will disengage color processing and allow the user to access the images via the Y8 video mode.
Enabling this mode is outside of the chip's intended use and as such can cause unfavourable color artifacts. For this reason, cameras designed to produce Bayer tiled images such as the Scorpion and Dragonfly are recommended to users looking for high color fidelity.
The two primary issues that will affect users are:
Users that are still interested in exploring this option despite the aforementioned problems can simply do the following:
- The sharpness filter is applied to the unprocessed image causing artifacts when performing the Bayer decoding on the PC.
- There will be holes or gaps in the image histogram (Refer to TSB15LV01 Errata for more information).
Set bit 30 (second to last) of register F20h to 0. To do this in FlyCap: Open the Camera Control dialog, and select the "Extended" or "Register" tab (depending on software version). Place F20 in the register number and "Get" the register.
||33 65 02 03
||33 65 02 01|
||33 63 02 03
||33 63 02 01|
Now set the format to Y8 in the "Format and Framerate" tab of the Camera Control dialog. In the "Colour Processing" tab, enable colour processing by changing the method to "Nearest Neighbor (Fast)" and set the image format to "GBRG".
Experimentation seems to indicate that following these guidelines will give the best camera results:
Having poked the register as described above, the user can acquire Bayer tiled images by acquiring images in Y8 mode.
- Auto White Balancing will have to be disabled. It will no longer behave correctly, and the white balance will have to be set manually.
- Saturation has been found to no longer have any effect.
- A low sharpness produces the most favourable results.
1.) How do the Firefly and Firefly2 differ from other PGR Imaging Products?
|12/9/2004 4:40:36 PM