get("#137") -- split
get("#349") -- table functions
get("#350") -- RecogUtil 2

function make_sig2letter()
  -- signatures from alphabet (#1000084)
  sigs = "121-121 121-121 232-121 2321-12121 121-121 12321-1212121 1321-1212121 121-1 12321-12121 12321-1212121 1-1"
  letters = "0123456789/"
  sigs, sig2letter = split(sigs, " "), {}
  for i=1, #sigs do
    sig = sigs[i]
    if sig2letter[sig] == nil then sig2letter[sig] = {} end
    table.insert(sig2letter[sig], letters:sub(i, i))
  end
end

-- [014][014]23[014][59]678[59]/ :)

function fix()
  local w, h, let = x2-x1, y2-y1, valuestokeys(letters)
  local cropped = { width = w, height = h,
    getInt = function(x, y) return img.getInt(x+x1, y+y1) end }
  
  -- distinguish 0 and 1 by middle width
  if let["0"] and let["1"] then
    local middleWidth = getWidth(cropped, math.floor(h/2))
    let[middleWidth/h < 0.5 and "0" or "1"] = nil
  end
  
  if (let["0"] or let["1"]) and let["4"] then
    -- check the bottom (the "leg" of the 4)
    local yo, threshold = 8/9, 0.5
    local avgLeft = getAverageLeft(cropped, math.floor(h*yo), h)
    if avgLeft/w >= threshold then
      let["0"], let["1"] = nil, nil
    else
      let["4"] = nil
    end
  end
  
  if let["5"] and let["9"] then
    -- check the top
    local yo, threshold = 1/9, (0.07+0.23)/2
    local avgLeft = getAverageLeft(cropped, 0, math.floor(h*yo))
    local flag = avgLeft/w >= threshold
    print("avgLeft", avgLeft/w, "threshold", threshold, "flag", flag)
    let[flag and "5" or "9"] = nil
  end
  
  letters = keystolist(let)
end

-- works on x1, lastX2
function isSpace()
  if lastX2 == nil then return false end
  local d = (x1-lastX2)/(y2-y1)
  --print("space dist", d)
  return d >= 0.3
end

make_sig2letter()

result = otherresults["#345"] or error("Need result of #345")
_, _, s = string.find(result, ": (.+)")
if s == nil then return end
parts = split(s, "|")

-- could also recalc this from parts
sigs = otherresults["#340"] or error("Need result of #340")
sigs = split(sigs, " ")

result = {}

for i=1, #sigs do
  sig = sigs[i]
  letters = sig2letter[sig]
  part = parts[i]
  lastX2 = x2
  x1, y1, x2, y2 = unpack(split(part, ", "))
  x1, y1, x2, y2 = tonumber(x1), tonumber(y1), tonumber(x2), tonumber(y2)
  if isSpace() then table.insert(result, " ") end
    
  s = ""
  if letters == nil then
    print("Unknown signature: "..sig)
    s = "?"
  else
    if #letters > 1 then
      fix()
    end
    if #letters == 1 then
      s = letters[1]
    else
      s = "["..table.concat(letters).."]"
    end
  end
  table.insert(result, s)
end

return table.concat(result)