1 | get("#388") -- rect functions
|
2 | get("#137") -- split
|
3 | get("#390") -- msinsert
|
4 | get("#348") -- rgb functions
|
5 | |
6 | _debug = false |
7 | |
8 | function findSymbol(img, icon, minSimilarity) |
9 | -- split icon into lines |
10 | if type(icon) == 'string' then icon = split(icon, "\n") end |
11 | local w, h = #icon[1], #icon |
12 | if _debug then |
13 | print("w/h, img="..w.."/"..h..", "..img.width.."/"..img.height)
|
14 | end |
15 | |
16 | -- count non-question marks |
17 | local count = 0 |
18 | for yy=1, h do |
19 | line = icon[yy] |
20 | for xx=1, w do |
21 | c = line:sub(xx, xx) |
22 | if c ~= '?' then |
23 | count=count+1 |
24 | end |
25 | end |
26 | end |
27 | |
28 | local limit = count*25/100 |
29 | |
30 | if _debug then |
31 | print("count/limit: "..count.."/"..limit)
|
32 | end |
33 | |
34 | for y=0, img.height-h do |
35 | for x=0, img.width-w do |
36 | if _debug then |
37 | print("Testing "..x.."/"..y)
|
38 | end |
39 | local total, innerPixels = 0, {}
|
40 | local sim |
41 | |
42 | for yy=y, y+h-1 do |
43 | local line = icon[yy-y+1] |
44 | for xx=x, x+w-1 do |
45 | local pix = img.getInt(xx, yy) |
46 | local c = line:sub(xx-x+1, xx-x+1) |
47 | if c == '?' then |
48 | msinsert(innerPixels, pix) |
49 | else |
50 | local b = math.floor(bright(rgb(pix))*25+0.5) |
51 | local lb = string.byte(c)-string.byte("A")
|
52 | local diff = math.abs(b-lb) |
53 | total = total+diff |
54 | if total > limit then |
55 | if _debug then print("limit reached") end
|
56 | goto out |
57 | end |
58 | end |
59 | end |
60 | end |
61 | |
62 | sim = math.floor(100*(1-total/(count*25))+0.5) |
63 | if _debug then |
64 | print("Similarity at "..x.."/"..y..": "..sim.."%")
|
65 | end |
66 | |
67 | if sim >= minSimilarity then |
68 | return newRectangle(x, y, w, h) |
69 | end |
70 | |
71 | ::out:: |
72 | if _debug then |
73 | print("Skipping "..x.."/"..y)
|
74 | end |
75 | end |
76 | end |
77 | end |
Began life as a copy of #394
test run test run with input download show line numbers
Travelled to 12 computer(s): aoiabmzegqzx, bhatertpkbcr, cbybwowwnfue, gwrvuhgaqvyk, ishqpsrjomds, lpdgvwnxivlt, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, tslmcundralx, tvejysmllsmz, vouqrxazstgt
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| Snippet ID: | #413 |
| Snippet name: | Symbol Finder (include) |
| Eternal ID of this version: | #413/1 |
| Text MD5: | 611aae6e3a63f444cf32a79858d87464 |
| Author: | stefan |
| Category: | image recognition |
| Type: | Lua code |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2015-02-06 02:14:10 |
| Source code size: | 1888 bytes / 77 lines |
| Pitched / IR pitched: | No / Yes |
| Views / Downloads: | 758 / 146 |
| Referenced in: | [show references] |