C. Output Tabs: Despeckling & Fill zones
On the Despeckling Tab you can see the results of cleaning up the image of dirty garbage (removing extra dots from the image). Despeckling can't be done in Color/Greyscale mode:
The bigger the broom, the more intensive the cleaning:
Be careful, after changing the broom, you have to press the Output Tab, for the result to be written to HDD, not just being indicated. Pay attention, that after such changes the question mark appears on the page thumbnail in the preview bar. Two workflows are suggested: 1. Do the output in batch mode -> switch to the tab Despeckling -> go through all the pages switching the broom manually where necessary -> run batch processing for the second time (this will be done faster than at the first time). 2. Every time having changed the level of despeckling, switch to the tab Output to write the result to disk.
The broom is not just a filter by size. The model is more complicated. There exist an upper limit on size, and larger objects will not be removed. Letters exceed this limit, but not the punctuation marks. Then likewise to celestial bodies: an object can hold another object if it is not too large or too far away. That object, in turn, can also hold other objects and so on. For each object ST checks, if there is any object-holder in the chain that has reached the upper limit in size.
On the Fill Zones Tab you can manually select an area of a page. You can fill it with a color of your choice, using the same zone creation tool as picture zones. Usually we use Fill zones as eraser for large objects like stamps and inscriptions. It's also convenient to have the ability of making minor deletions within Scan Tailor, with no use of any other software:
When you click the right mouse button on the zone, a pop-up menu with the Pick color and Delete items appears. Selecting "Delete" removes the Fill zone. Selecting "Pick color" shows red circle, which must be aimed over the target color. This tool often helps to fill over holes on colored covers:
