-- card: 2325 from stack: in
-- bmap block id: 5070
-- flags: 0000
-- background id: 7909
-- name: Threshold
----- HyperTalk script -----
on openCard
  hide menuBar
  show card field "Message Center"
  set hilite of background button "Scan. Concepts" to true
  set hilite of background button "How It Works" to false
  set hilite of background button "The System" to false
  set hilite of background button "File Formats" to false
end openCard

on closeCard
  hide card field "Cover All"
  hide card button "Self-Check"
  show card field "Message Center"
  set hilite of background button "Scan. Concepts" to true
  set hilite of background button "How It Works" to false
  set hilite of background button "The System" to false
  set hilite of background button "File Formats" to false
end closeCard



-- part 1 (field)
-- low flags: 01
-- high flags: 2004
-- rect: left=13 top=179 right=270 bottom=495
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Message Center


-- part 6 (button)
-- low flags: 80
-- high flags: A004
-- rect: left=1 top=315 right=340 bottom=511
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Self-Check
----- HyperTalk script -----
on mouseUp
  visual iris close
  hide card button "Self-Check"
  hide card field "Cover All"
  pop card
end mouseUp



-- part 7 (field)
-- low flags: 81
-- high flags: 0001
-- rect: left=5 top=272 right=310 bottom=510
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Cover All


-- part contents for card part 1
----- text -----
The threshold parameter determines which gray dots in the original will result in white dots in the bitmap, and which will be black.  For example, if you set the threshold level at 10, all dots with a density less than 10 are detected as white; dots with a density of 10 or greater are detected as black.