1 | get("#348") -- bright and rgb
|
2 | |
3 | function getLeftmostPoint(img, y) |
4 | local x1 = 0 |
5 | while x1 < img.width and img.getInt(x1, y) >= 0xF00000 do |
6 | x1 = x1+1 |
7 | end |
8 | return x1 |
9 | end |
10 | |
11 | function getRightmostPoint(img, y) |
12 | local x2 = img.width |
13 | while x2 > 0 and img.getInt(x2-1, y) >= 0xF00000 do |
14 | x2 = x2-1 |
15 | end |
16 | return x2 |
17 | end |
18 | |
19 | function getWidth(img, y) |
20 | local x2 = getRightmostPoint(img, y) |
21 | local x1 = getLeftmostPoint(img, y) |
22 | return math.max(0, x2-x1) |
23 | end |
24 | |
25 | function getAverageWidth(img, y1, y2) |
26 | local sum = 0 |
27 | for y = y1, y2-1 do |
28 | sum = sum+getWidth(img, y) |
29 | end |
30 | return sum/(y2-y1) |
31 | end |
32 | |
33 | function getAverageLeft(img, y1, y2) |
34 | y1, y2 = y1 or 0, y2 or img.height -- default arguments |
35 | |
36 | local sum = 0 |
37 | for y = y1, y2-1 do |
38 | sum = sum+getLeftmostPoint(img, y) |
39 | end |
40 | return sum/(y2-y1) |
41 | end |
42 | |
43 | function getAverageLeft_debug(img, y1, y2) |
44 | y1, y2 = y1 or 0, y2 or img.height -- default arguments |
45 | |
46 | local sum = 0 |
47 | for y = y1, y2-1 do |
48 | local x = getLeftmostPoint(img, y) |
49 | sum = sum+x |
50 | print("y", y, "left", x)
|
51 | end |
52 | return sum/(y2-y1) |
53 | end |
54 | |
55 | function getMaxWidth(img, y1, y2) |
56 | local max = 0 |
57 | for y = y1, y2-1 do |
58 | max = math.max(max, getWidth(img, y)) |
59 | end |
60 | return max |
61 | end |
62 | |
63 | function upperWidth(img) |
64 | return getAverageWidth(img, 0, math.floor(img.height/3)) |
65 | end |
66 | |
67 | function upperMaxWidth(img) |
68 | return getMaxWidth(img, 0, math.floor(img.height/3)) |
69 | end |
70 | |
71 | function lowerWidth(img) |
72 | return getAverageWidth(img, math.floor(img.height*2/3), img.height) |
73 | end |
74 | |
75 | function lowerMaxWidth(img) |
76 | return getMaxWidth(img, math.floor(img.height*2/3), img.height) |
77 | end |
78 | |
79 | function upperToLowerWidth(img) |
80 | return upperWidth(img) / lowerWidth(img) |
81 | end |
82 | |
83 | function getCenterOfGravity(img) |
84 | local sumx, sumy, sumdensity = 0, 0, 0 |
85 | for y=0, img.height-1 do |
86 | for x=0, img.width-1 do |
87 | local density = 1-bright(rgb(img.getInt(x,y))) |
88 | sumdensity = sumdensity+density |
89 | sumx = sumx+density*x |
90 | sumy = sumy+density*y |
91 | end |
92 | end |
93 | return sumx/sumdensity, sumy/sumdensity |
94 | end |
Similar to #343, but with "img" argument
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
No comments. add comment
| Snippet ID: | #350 |
| Snippet name: | RecogUtil 2 |
| Eternal ID of this version: | #350/1 |
| Text MD5: | ebcc917c4718f145d6b78a0e98205a19 |
| Author: | stefan |
| Category: | image recognition |
| Type: | Lua code |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2015-01-26 02:10:04 |
| Source code size: | 2090 bytes / 94 lines |
| Pitched / IR pitched: | No / Yes |
| Views / Downloads: | 720 / 151 |
| Referenced in: | [show references] |