*  a tool to clean the cam´s picture from false markers for [[calibration]].
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If your [[camsettings]] do not allow a clearer black-white picture, you may switch to the Eraser tab.
Now , holding LMB on the camview window, you paint white over the cam´s picture.
Do this, till calibration does not find more than the needed 25 Calibrationpoints.

Tips:
  * It´s not necssary that the background is as white as eraser´s white (but nearly)
  * It´s better to leave slight shadows in a bigger size, if they are of one color, for David not detects areas as points if they are bigger than :?::?::?:
  * With the RMB you can make your white paint particually undone.


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You can choose its size from 1 to 99 pixels.
You can not undo a single step, but only reset back to the uncleaned picture.
"calibrate" works the same way as [[automatic calibration]] 
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Note: Sometimes, after longer continous work, the eraser stays painting when the LMB isn´t pressed any more and you don´t see it, for the picture is white on white. This may damage you cleaning prozess. Click LMB once again to be shure that eraser´s work ends.