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// 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()
gray := image.NewGray(b)
draw.Draw(gray, b, img, b.Min, draw.Src)
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)
}
})
}
}
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