From 2e923f2991d4070d86bd5d63a5434f30ce570fd3 Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Tue, 4 Aug 2020 13:29:06 +0100
Subject: Rename package from integralimg to integral

---
 integralimg_test.go | 185 ----------------------------------------------------
 1 file changed, 185 deletions(-)
 delete mode 100644 integralimg_test.go

(limited to 'integralimg_test.go')

diff --git a/integralimg_test.go b/integralimg_test.go
deleted file mode 100644
index 885ff61..0000000
--- a/integralimg_test.go
+++ /dev/null
@@ -1,185 +0,0 @@
-// Copyright 2020 Nick White.
-// Use of this source code is governed by the GPLv3
-// license that can be found in the LICENSE file.
-
-package integralimg
-
-import (
-	"image"
-	"image/draw"
-	_ "image/png"
-	"os"
-	"testing"
-)
-
-func TestFromPNG(t *testing.T) {
-	f, err := os.Open("testdata/in.png")
-	if err != nil {
-		t.Fatalf("Could not open file %s: %v\n", "testdata/in.png", err)
-	}
-	defer f.Close()
-	img, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Could not decode image: %v\n", err)
-	}
-	b := img.Bounds()
-
-	integral := NewImage(b)
-	draw.Draw(integral, b, img, b.Min, draw.Src)
-
-	if !imgsequal(img, integral) {
-		t.Errorf("Read png image differs to integral image\n")
-	}
-}
-
-func TestSqFromPNG(t *testing.T) {
-	f, err := os.Open("testdata/in.png")
-	if err != nil {
-		t.Fatalf("Could not open file %s: %v\n", "testdata/in.png", err)
-	}
-	defer f.Close()
-	img, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Could not decode image: %v\n", err)
-	}
-	b := img.Bounds()
-
-	integral := NewSqImage(b)
-	draw.Draw(integral, b, img, b.Min, draw.Src)
-
-	if !imgsequal(img, integral) {
-		t.Errorf("Read png image differs to square integral image\n")
-	}
-}
-
-func TestSum(t *testing.T) {
-	f, err := os.Open("testdata/in.png")
-	if err != nil {
-		t.Fatalf("Could not open file %s: %v\n", "testdata/in.png", err)
-	}
-	defer f.Close()
-	img, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Could not decode image: %v\n", err)
-	}
-	b := img.Bounds()
-
-	imgplus := newGray16Plus(b)
-	integral := NewImage(b)
-
-	draw.Draw(imgplus, b, img, b.Min, draw.Src)
-	draw.Draw(integral, b, img, b.Min, draw.Src)
-
-	cases := []struct {
-		name string
-		r    image.Rectangle
-	}{
-		{"fullimage", b},
-		{"small", image.Rect(1, 1, 5, 5)},
-		{"toobig", image.Rect(0, 0, 2000, b.Dy())},
-		{"toosmall", image.Rect(-1, -1, 4, 5)},
-		{"small2", image.Rect(0, 0, 4, 4)},
-	}
-
-	for _, c := range cases {
-		t.Run(c.name, func(t *testing.T) {
-			sumimg := imgplus.sum(c.r)
-			sumint := integral.Sum(c.r)
-			if sumimg != sumint {
-				t.Errorf("Sum of integral image differs to regular image: regular: %d, integral: %d\n", sumimg, sumint)
-			}
-		})
-	}
-}
-
-func TestMean(t *testing.T) {
-	f, err := os.Open("testdata/in.png")
-	if err != nil {
-		t.Fatalf("Could not open file %s: %v\n", "testdata/in.png", err)
-	}
-	defer f.Close()
-	img, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Could not decode image: %v\n", err)
-	}
-	b := img.Bounds()
-
-	imgplus := newGray16Plus(b)
-	integral := NewImage(b)
-
-	draw.Draw(imgplus, b, img, b.Min, draw.Src)
-	draw.Draw(integral, b, img, b.Min, draw.Src)
-
-	cases := []struct {
-		name string
-		r    image.Rectangle
-	}{
-		{"fullimage", b},
-		{"small", image.Rect(1, 1, 5, 5)},
-		{"toobig", image.Rect(0, 0, 2000, b.Dy())},
-		{"toosmall", image.Rect(-1, -1, 4, 5)},
-		{"small2", image.Rect(0, 0, 4, 4)},
-	}
-
-	for _, c := range cases {
-		t.Run(c.name, func(t *testing.T) {
-			meanimg := imgplus.mean(c.r)
-			meanint := integral.Mean(c.r)
-			if meanimg != meanint {
-				t.Errorf("Mean of integral image differs to regular image: regular: %f, integral: %f\n", meanimg, meanint)
-			}
-		})
-	}
-}
-
-func imgsequal(img1, img2 image.Image) bool {
-	b := img1.Bounds()
-	if !b.Eq(img2.Bounds()) {
-		return false
-	}
-	for y := b.Min.Y; y < b.Max.Y; y++ {
-		for x := b.Min.X; x < b.Max.X; x++ {
-			r0, g0, b0, a0 := img1.At(x, y).RGBA()
-			r1, g1, b1, a1 := img2.At(x, y).RGBA()
-			if r0 != r1 {
-				return false
-			}
-			if g0 != g1 {
-				return false
-			}
-			if b0 != b1 {
-				return false
-			}
-			if a0 != a1 {
-				return false
-			}
-		}
-	}
-	return true
-}
-
-type grayPlus struct {
-	image.Gray16
-}
-
-func newGray16Plus(r image.Rectangle) *grayPlus {
-	var g grayPlus
-	g.Gray16 = *image.NewGray16(r)
-	return &g
-}
-
-func (i grayPlus) sum(r image.Rectangle) uint64 {
-	var sum uint64
-	for y := r.Min.Y; y < r.Max.Y; y++ {
-		for x := r.Min.X; x < r.Max.X; x++ {
-			c := i.Gray16At(x, y).Y
-			sum += uint64(c)
-		}
-	}
-	return sum
-}
-
-func (i grayPlus) mean(r image.Rectangle) float64 {
-	in := r.Intersect(i.Bounds())
-	return float64(i.sum(r)) / float64(in.Dx()*in.Dy())
-}
-- 
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