get("#348") -- rgb and bright

get("#137") -- split

get("#390") -- msinsert

y, w, h = img.height-19, 20, 17

x = img.width-w

if y < 0 or y+h > img.height then return "No Battery Symbol" end

--[[

original icon:

YYYYYYYYYYYYYYYYYYYY

YYYYYYYYYYYYYYYYYYYY

YLCCCCCCCCCCCCCCLYXX

YEEEEEEEEEEEEEEEEYXX

XFFSVVVVVVVVVVSFFXXX

XGGUSSSSSSSSSSUGGXXX

XGGTSSSSSSSSSSTGGDHX

XHHTSSSSSSSSSSTHHHGX

XIITSSSSSSSSSSTIIIIX

WIITSSSSSSSSSSTIIINW

WJJTRRRRRRRRRRTJJXXW

WKKOSSSSSSSSSSOKKWWW

WLKHFFFFFFFFFFHKLWVV

VSMLLLLLLLLLLLLMSVVV

VWXXXXXXXXXXXXXXWVVV

VVVVVVVVVVVVVVVVVVVV

VVVVVVVVVVVVVVVVVVVV

]]

icon = [[

YYYYYYYYYYYYYYYYYYYY

YYYYYYYYYYYYYYYYYYYY

YLCCCCCCCCCCCCCCLYXX

YEEEEEEEEEEEEEEEEYXX

XFFS???????????FFXXX

XGGU???????????GGXXX

XGGT???????????GGDHX

XHHT???????????HHHGX

XIIT???????????IIIIX

WIIT???????????IIINW

WJJT???????????JJXXW

WKKO??????????OKKWWW

WLKHFFFFFFFFFFHKLWVV

VSMLLLLLLLLLLLLMSVVV

VWXXXXXXXXXXXXXXWVVV

VVVVVVVVVVVVVVVVVVVV

VVVVVVVVVVVVVVVVVVVV

]]

icon = split(icon, "\n")

innerPixels = {}

while x >= 0 do

  total, count = 0, 0

  for yy=y, y+h-1 do

    line = icon[yy-y+1]

    for xx=x, x+w-1 do

      pix = img.getInt(xx, yy)

      c = line:sub(xx-x+1, xx-x+1)

      if c == '?' then

        msinsert(innerPixels, pix)

      else

        b = math.floor(bright(rgb(pix))*25+0.5)

        lb = string.byte(c)-string.byte("A")

        diff = math.abs(b-lb)

        total, count = total+diff, count+1

      end

    end

  end

  sim = math.floor(100*(1-total/(count*25))+0.5)

  print("Similarity at x="..x..": "..sim.."%")

  if sim >= 99 then

    return "Battery Symbol: "..x..", "..y..", "..x+w..", "..y+h

  end

  x = x-1

end

x = nil

return "No Battery Symbol"

-- innerPixels and x, y, w, h are returned for including snippets