Photron Fastcam BC2 HD, Hardware Manual

Page: 30 / 83

3. Recording
18
3.1. Image Initialization (Calibration)
In order to maximize the high image quality of the system, it is necessary to correct the
non-uniformity in each pixel that is inherent in the image sensor.
The system is equipped with a function to correct the output value for each pixel using the black
level as a reference. Using a uniform black image as the reference, perform correction (calibration) to
zero the dark signal for all pixels. This makes it possible to obtain faithful image output for the input
light level.
•
In order to obtain faithful image output, it is highly recommended to execute calibration before
recording when the following settings are changed.
▪
When the frame rate is changed
▪
When the shutter speed is changed
▪
When the resolution is changed
Also, depending on the settings, the following phenomena may occur.
▪
Fixed noise like horizontal bands appears
▪
A portion of the screen is clear, but noise appears in the area around it
These phenomena can be resolved by executing calibration again.
3.1.1. Executing Calibration
Calibration is executed from the remote controller (optional accessory) or from PFV.
• For how to execute the calibration procedure, refer to the "Remote Controller User's Manual" or the
"Photron FASTCAM Viewer User's Manual".
3.1.2. Saving Calibration Settings
The black image data for correction that was obtained by executing calibration can be saved as
one pattern internally on the system.
3.1.3. Loading Calibration Settings
The black image data for correction saved internally can also be loaded.