VX6953CB Datasheet, PDF (73/107 Pages) STMicroelectronics – 5.1 megapixel EDOF camera module

VX6953CB
EDOF control
8.3.2
8.3.3
Note:
8.3.4
Note:
EDoF_est_focus_distance (0x0B82)
The edof_est_focus_distance register (0x0B82) is Read Only. This register tells the user the
estimated focus point that the EDoF function has calculated. Register values for a 5 Mpixel
EDoF camera are:
• Macro mode: 0x1E
• Portrait: 0x3F
• Landscape: 0xFA
EDoF tuning sliders (0xB83 to 0x0B85)
The three key registers for the end user tuning are the sharpness, denoising and noise
versus detail registers.
Recommended settings
For the recommended settings of the EDoF sliders (0x0B83 to 0x0B85) refer to the relevant
personality file, see Section 7.2 on page 68.
Upon request, ST can provide the EDoF application note that gives details for HOST tuning.
EDoF focus distance (0x0B88)
For automatic mode, the value range is 0x8000 to 0xFFFF. Whatever value is selected
within this range will enable automatic distance estimation. ST recommends setting the
EDoF estimation mode to automatic mode. In this mode, when the user selects capture
mode, the EDoF processing will automatically use the last estimate of the focus distance
obtained in preview mode.
If it is necessary to switch between estimation mode and application mode while in software
standby, then a patch must be loaded to enable this feature. If the patch is not loaded,
switching must be performed whilst streaming. Otherwise the host must read the estimation
data (from register 0x0B82) immediately before going to software standby and rewrite that
data (to register 0x0B88) before restarting streaming in application mode.
For manual mode, the value to be set in the register is the value of the distance in cm. The
range is 0x0000 to 0x7FFF. If you want to go to one of the following modes, apply the
specified value for a 5 Mpixel EDoF camera:
• Super Macro mode: 0 to 29cm
• Macro mode: 30 to 59cm
• Portrait: 60 to 249cm
• Landscape: 250 to 32767cm
Supermacro mode only works in manual mode. Refer to Section 8.4: Supermacro mode for
more detailed information.
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