A quick question

The actin picture I showed contains some noise as dots and I want to remove those small dots and leave the line-shaped actins. It should be easy and I am considering threshold or mask? But threshold is seems based on intensity and mask need to identify the dots as objectives from existing objective? Is this workable? Any easier way to do so? Thanks
屏幕快照 2020-02-06 下午1.33.56

You should be able to use the minimum typical diameter filter in IdentifyPrimaryObjects for this. If you’re not using those settings for some reason, an alternative would be to run MeasureObjectSizeShape and then use FilterObjects to discard objects which have low area or high circularity.