1 files changed, 73 insertions, 0 deletions
diff --git a/example_test.go b/example_test.go
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index 0000000..8958557
--- /dev/null
+++ b/example_test.go
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+// 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_test
+
+import (
+	"fmt"
+	"image"
+	"image/draw"
+	_ "image/png"
+	"log"
+	"os"
+
+	"rescribe.xyz/integralimg"
+)
+
+func ExampleImage_Sum() {
+	f, err := os.Open("testdata/in.png")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	img, _, err := image.Decode(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+	b := img.Bounds()
+	integral := integralimg.NewImage(b)
+	draw.Draw(integral, b, img, b.Min, draw.Src)
+	fmt.Printf("Sum: %d\n", integral.Sum(b))
+	// Output:
+	// Sum: 601340165
+}
+
+func ExampleImage_Mean() {
+	f, err := os.Open("testdata/in.png")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	img, _, err := image.Decode(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+	b := img.Bounds()
+	integral := integralimg.NewImage(b)
+	draw.Draw(integral, b, img, b.Min, draw.Src)
+	fmt.Printf("Mean: %f\n", integral.Mean(b))
+	// Output:
+	// Mean: 54677.229042
+}
+
+func ExampleMeanStdDev() {
+	f, err := os.Open("testdata/in.png")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	img, _, err := image.Decode(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+	b := img.Bounds()
+	integral := integralimg.NewImage(b)
+	sqIntegral := integralimg.NewSqImage(b)
+	draw.Draw(integral, b, img, b.Min, draw.Src)
+	draw.Draw(sqIntegral, b, img, b.Min, draw.Src)
+	mean, stddev := integralimg.MeanStdDev(*integral, *sqIntegral, b)
+	fmt.Printf("Mean: %f, Standard Deviation: %f\n", mean, stddev)
+	// Output:
+	// Mean: 54677.229042, Standard Deviation: 21643.721672
+}