a - Change Resolution
This option can be used to change the resolution of the video coming from the sensor. Currently 1080p@15Hz is not supported and will cause problems if used.
b - Change Liquid Lens Focus
This option is not compatible with this version of the Pcam 5C and should be ignored
d - Change Image Format
This option was included for debugging purposes and should always be set to RAW mode (option 2)
e - Write a Register inside the Image Sensor
This option allows you to write a value to any register inside the Image sensor over the OmniVision SCCB interface. You will need to refer to the OV5640 datasheet for information on the register map. This option is very useful for exploring the features of the image sensor.
f - Read a Register inside the Image Sensor
This option allows you to read the value of any register inside the Image sensor over the OmniVision SCCB interface.
g - Change Gamma Correction Factor Value
This option allows you to change the amount of gamma correction that is done by the custom AXI stream IP inside the FPGA.
h - Change AWB Settings
This option allows you to adjust how the image sensor is doing auto white balancing. There are 3 modes: Advanced, simple, and disabled. The advanced mode sometimes causes dramatic shifts between “red-ish” and “blue-ish” tints.