summaryrefslogtreecommitdiff
path: root/wipesides_test.go
blob: 660cb1671afd4c0a6c218c8551707a416d213a15 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
// Copyright 2019-2020 Nick White.
// Use of this source code is governed by the GPLv3
// license that can be found in the LICENSE file.

package preproc

// TODO: Integrate all test cases into one struct that has
//       several different tests (horiz only, vert only,
//       both) run on it.

import (
	"fmt"
	"image"
	"image/draw"
	"image/png"
	"os"
	"testing"

	"rescribe.xyz/integralimg"
)

func TestWipeSides(t *testing.T) {
	cases := []struct {
		orig   string
		golden string
		thresh float64
		wsize  int
	}{
		{"testdata/pg2.png", "testdata/pg2_integralwipesides_t0.02_w5.png", 0.02, 5},
		{"testdata/pg2.png", "testdata/pg2_integralwipesides_t0.05_w5.png", 0.05, 5},
		{"testdata/pg2.png", "testdata/pg2_integralwipesides_t0.05_w25.png", 0.05, 25},
	}

	for _, c := range cases {
		t.Run(fmt.Sprintf("Exact/%s_%0.2f_%d", c.orig, c.thresh, c.wsize), func(t *testing.T) {
			var actual *image.Gray
			orig, err := decode(c.orig)
			if err != nil {
				t.Fatalf("Could not open file %s: %v\n", c.orig, err)
			}
			actual = Wipe(orig, c.wsize, c.thresh, 30)
			if *update {
				f, err := os.Create(c.golden)
				defer f.Close()
				if err != nil {
					t.Fatalf("Could not open file %s to update: %v\n", c.golden, err)
				}
				err = png.Encode(f, actual)
				if err != nil {
					t.Fatalf("Could not encode update of %s: %v\n", c.golden, err)
				}
			}
			golden, err := decode(c.golden)
			if err != nil {
				t.Fatalf("Could not open file %s: %v\n", c.golden, err)
			}
			if !imgsequal(golden, actual) {
				t.Errorf("Processed %s differs to %s\n", c.orig, c.golden)
			}
		})
	}
	leftrightedgecases := []struct {
		filename string
		minleft  int
		maxleft  int
		minright int
		maxright int
		thresh   float64
		wsize    int
	}{
		{"testdata/0002.png", 36, 250, 967, 998, 0.02, 5},
		{"testdata/1727_GREENE_0048.png", 40, 150, 1270, 1281, 0.02, 5},
	}

	for _, c := range leftrightedgecases {
		t.Run(fmt.Sprintf("LeftRightEdge/%s_%0.2f_%d", c.filename, c.thresh, c.wsize), func(t *testing.T) {
			img, err := decode(c.filename)
			if err != nil {
				t.Fatalf("Could not open file %s: %v\n", c.filename, err)
			}
			b := img.Bounds()
			integral := integralimg.NewImage(b)
			draw.Draw(integral, b, img, b.Min, draw.Src)
			leftedge, rightedge := findedges(*integral, c.wsize, c.thresh)
			if leftedge < c.minleft {
				t.Errorf("Left edge %d < minimum %d", leftedge, c.minleft)
			}
			if leftedge > c.maxleft {
				t.Errorf("Left edge %d > maximum %d", leftedge, c.maxleft)
			}
			if rightedge < c.minright {
				t.Errorf("Right edge %d < minimum %d", rightedge, c.minright)
			}
			if rightedge > c.maxright {
				t.Errorf("Right edge %d > maximum %d", rightedge, c.maxright)
			}
		})
	}

	topbottomedgecases := []struct {
		filename  string
		mintop    int
		maxtop    int
		minbottom int
		maxbottom int
		thresh    float64
		wsize     int
	}{
		{"testdata/1727_GREENE_0048.png", 70, 237, 2204, 2450, 0.005, 120},
		{"testdata/1687_SCHWEITZER_0030.png", 70, 231, 2595, 2770, 0.005, 90},
	}

	for _, c := range topbottomedgecases {
		t.Run(fmt.Sprintf("TopBottomEdge/%s_%0.3f_%d", c.filename, c.thresh, c.wsize), func(t *testing.T) {
			img, err := decode(c.filename)
			if err != nil {
				t.Fatalf("Could not open file %s: %v\n", c.filename, err)
			}
			b := img.Bounds()
			rotimg := sideways(img)
			b = rotimg.Bounds()
			intImg := integralimg.NewImage(b)
			draw.Draw(intImg, b, rotimg, b.Min, draw.Src)
			topedge, bottomedge := findedges(*intImg, c.wsize, c.thresh)
			if topedge < c.mintop {
				t.Errorf("Top edge %d < minimum %d", topedge, c.mintop)
			}
			if topedge > c.maxtop {
				t.Errorf("Top edge %d > maximum %d", topedge, c.maxtop)
			}
			if bottomedge < c.minbottom {
				t.Errorf("Bottom edge %d < minimum %d", bottomedge, c.minbottom)
			}
			if bottomedge > c.maxbottom {
				t.Errorf("Bottom edge %d > maximum %d", bottomedge, c.maxbottom)
			}
		})
	}
}