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get("#348") -- rgb functions
get("#346") -- getcrop
get("#337") -- map(list, f)
w, h = img.width, img.height
brightnessThreshold = 0.9
function isEmpty(y)
for x=0, w-1 do
if bright(rgb(img.getInt(x, y))) <= brightnessThreshold then
return false
end
end
return true
end
lastEmpty = true
segments = {}
for y=0, h-1 do
empty = isEmpty(y)
if empty and not lastEmpty then
table.insert(segments, {start, y})
elseif not empty and lastEmpty then
start = y
end
lastEmpty = empty
end
if not lastEmpty then
table.insert(segments, {start, h})
end
if #segments <= 1 then -- don't bother with only 1 segment
return
end
result = {}
for _, seg in ipairs(segments) do
local sy1, sy2 = unpack(seg)
local cropped = {
width = img.width,
height = sy2-sy1,
getInt = function(x, y)
return img.getInt(x, y+sy1)
end
}
local x1, y1, x2, y2 = getcrop(cropped)
table.insert(result, x1..", "..(y1+sy1)..", "..x2..", "..(y2+sy1))
end
return "Parts: "..table.concat(result, "|")