Hello guys! I'm newbe on ImageJ, so I gratefull for any help.
I need the perimeter, area and area fraction from this white panel.
So I do it: 1º Straight
2º Analyze>Set Scale
4º Edit>Clear outside
5º Analyze>Set measuramentes>pick up_perimeter, area and fraction area_
But after Threshold some parts of objects in front of panel came white. I want, after Threshold, that just panel stay white and all other objects stay black, How can I do it?
I alredy tried Convert to mask, Fill hole, Watershed and manually Fill it.