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- IC Driver; this pull-down is populated based on the attached sensor. For example, if the sensor has an Internal VCM then that driver will be available.
Use the pull-down to select the actuator type of the attached module.
Note: there is no method of auto-detecting the actuator type - you must know this. - Focus Types; this pull-down allows you to select the plug-in function.
Note: fields will be enabled/disabled based on your selection - these are described below.- Manual; allows for manual movement of the actuator via the slider bar.
- Auto - Full Scan; will automatically find the best focus position thru the range as defined by "Min" and "Max".
This is the simplest method of finding the best focus position, but takes longer as it checks all available positions. - Auto - Fast Focus; will do a curve-fit to find the best focus position starting at "Min".
It works by moving the lens and keeping track of the Sharpness scores; once the score goes up and then starts going down, it stops and using the scores produces a "curve" and selects the top of the curve. - IC Driver Direct Reg Access; allows you to access actuator register(s).
- Capture Frames; starting at "Min" and ending at "Max", position the actuator and capture an image for the number in "1st Scan".
- PDAF; uses the Phase Differential method to find the best focus position.
Only works with sensors that have PDAF enabled, and requires tuning calibration within DevWare's PDAF dialog - those instructions are not included hereprovided below under "PDAF Calibration".
- Steps - 1st Scan; sets the number of steps used for Full Scan, Fast Focus, and Capture Frames.
- Steps - 2nd Scan; set the number of steps used after Full Scan or Fast Focus finds the initial focal position.
This provides a faster method of find the very best focus position taking the 1st Scan results and doing additional steps surrounding it. - Steps - Macro Mode; for Full Scan and Fast Focus, sets the initial position not a "Min" but at the "Macro" position.
For times when the module is very close to subject - avoids trying focus positions that are known not to be the best Sharpness score. - Physical Min/Max; the physical minimum and maximum to be used for the actuator.
These are sometimes not the true min/max since the actuator itself my only move at lesser amounts; for example, the actuator may only start moving at 100 not 0, and stop at 900 and not 1023. - Other Settings - Slew Rate; for actuators that have this value, set the amount of slew.
- Other Settings - Skip Frames; number of frames to skip before calculating the next Sharpness score - a lower number means faster completion of auto functions.
- If too low a number is selected the automated Focus Types may not work due to too-little time allowed for the actuator to finish moving.
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- Only available for Full Scan, Fast Focus, Capture Frames, and PDAF.
- To use, first select the location and name of the CSV file to be generated, then select "Enable Logging" and then "Trigger" to start the process.
- To close the file for viewing, deselect "Enable Logging".
PDAF Calibration
Use the following instructions to calibrate DevWare processing of the PDAF data when using a PDAF-enabled module.
- Position the sensor at the distance you consider "infinite" (usually about 2 feet or so) so the lens is "in focus".
- Enable PDAF data on the sensor via the appropriate INI preset, and then open the PDAF dialog and enable "Overall Defocus Position" (blue arrow).
Also, set the "Coefficient" to -40.0 as this empirically appears to be a decent value.
- On the main image at the bottom, you should now see the position indicator bar.
The red circle indicates the current location (the green bubble) of "in focus" for the position bar, and the green circle is where you need to adjust that to (white diamond). - Using the "Offset" value in the PDAF dialog, adjust it so the green bubble in on the white diamond.