The following is an overview of the Lens tab of Capture OEM.



Sharpness Score - Region of Interest


A set of control information the camera uses to calculate the SharpnessScore  of an image.  The SharpnessScore of the image, is returned in the  SharpnessScore field of the Histogram window.  The ROI defines the  area, within the currently defined Region of Interest, that is used by  the camera to compute the image SharnessScore.  The SharpnessScore  of an image, is a metric of how many ‘crisp’ edges there are in the image.   Higher values indicate the presence of more edges.  Comparing  the SharpnessScore of an image of one target to an image of a different  target, is meaningless, as there are no units associated with the SharpessScore.   Rather it is intended that this score could be used to compare subsequent  images of the same target, as focal adjustments are made to the stream  of images (with perhaps Focus Control, if the camera/lens supports it).   The user should continue to make focal adjustments until this value  is maximized (for this given target).  


Preview Overlay


Will enable or disable the preview of the sharpness score ROI onto the  preview window.


Focus Control


Manually or Automatically control the focal level of the image. Adjust the slider bar and click Assert Limit to set a lower and upper limit for an auto focus operation. The AutoFocus algorithm will then search this range to find the correct focus value for the specified ROI.


Lens Controller Select:


By default, when one camera and one Navitar Lens Controller are attached to the host computer, the camera and lens controller will automatically pair with one another. If multiple cameras or multiple control boards are attached to the host computer, the camera and control boards must be manually pair. To select what control board you with to control with the current camera, select the desired control board from the Lens Controller Select drop down.


Zoom Control


The zoom control functions similarly to the focus control. You can control the zoom value by dragging the zoom slider or by manually entering a zoom position in the text box. The Assert Limit buttons can be used to set a lower an upper limit.