MassConv supports filters that can be applied on all the images you process. To define the filters to be used and their parameters You must create .fil files. They are simply text-script files that specify the order and the parameters of the built-in filters You want to use. .fil files could be created using any text editor, but using the MassConv Editor makes the task extremely easy.
The Editor with some example input:
The two big panes on top show the image befor the processing and after it. To refresh the right image click the "preview" button. The Editor allows you to select an image and see what will happen if you apply certain filters on it. The filter file you sre creating is in the lower-right pane and there you must add the filters and specify their arguments(if any). After the seeked result is achieved, click "Save As.." and then use the saved .fil file in the MassConv Starter application. For detailed info on the supported filter types and their arguments click here.