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< > BotCompany Repo | #480 - Horizontal split with crop 2 (include)

Lua code

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get("#348") -- rgb functions
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get("#479") -- getcrop2
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get("#337") -- map(list, f)
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get("#388") -- rectangle functions
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brightnessThreshold = 0.9
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function horizontalsplit(img)
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  local function isEmpty(x)
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    for y=0, img.height-1 do
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      if bright(rgb(img.getInt(x, y))) <= brightnessThreshold then
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        return false
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      end
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    end
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    return true
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  end
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  local lastEmpty, start = true, nil
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  local segments = {}
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  for x=0, img.width-1 do
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    empty = isEmpty(x)
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    if empty and not lastEmpty then
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      table.insert(segments, {start, x})
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    elseif not empty and lastEmpty then
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      start = x
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    end
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    lastEmpty = empty
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  end
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  if not lastEmpty then
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    table.insert(segments, {start, img.width})
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  end
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  if #segments <= 1 then -- don't bother with only 1 segment
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    return {}
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  end
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  local result = {}
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  for _, seg in ipairs(segments) do
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    local sx1, sx2 = unpack(seg)
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    local cropped = {
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      width = sx2-sx1,
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      height = img.height,
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      getInt = function(x, y)
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        return img.getInt(x+sx1, y)
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      end
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    }
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    local x1, y1, x2, y2 = getcrop2(cropped)
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    table.insert(result, newRectangle(x1+sx1, y1, x2-x1, y2-y1))
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  end
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  return result
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end

Author comment

Began life as a copy of #478

test run  test run with input  download  show line numbers   

Travelled to 8 computer(s): aoiabmzegqzx, cbybwowwnfue, gwrvuhgaqvyk, ishqpsrjomds, lpdgvwnxivlt, mqqgnosmbjvj, tslmcundralx, tvejysmllsmz

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Snippet ID: #480
Snippet name: Horizontal split with crop 2 (include)
Eternal ID of this version: #480/1
Text MD5: 66e3cd56a59ddf696cdc124b7de77631
Author: stefan
Category:
Type: Lua code
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2015-02-25 19:35:22
Source code size: 1245 bytes / 54 lines
Pitched / IR pitched: No / Yes
Views / Downloads: 458 / 70
Referenced in: [show references]

Formerly at http://tinybrain.de/480 & http://480.tinybrain.de