Dust map

"Dust map" is a special function to remove black points from the images caused by dust on the sensor or dust in the optical system of the microscope.  The dust points often leave a dark "tracks" on the resulting image. Please have a look at the 100% crop of the sample image (provided by Phil McCollum):

"Dust map" function is OFF	"Dust map" function is ON

To use this function follow these steps:

1. Prepare "white frame".  After (or before) you shot all other images, make unfocused (!) shot of the white surface, so that dust on the sensor can be easily identified.
2. Start Helicon Focus, add stack of images.
3. Add  dust map using "File->Add dust map" menu command.
4. Run combining process.

Please note, that dust map should have the same dimensions as all the other images in the stack.

Here is an example of the "white frame" or dust map (provided by Phil McCollum):

And here is the dust map processed by Helicon Focus to reveal small dust points: