func main() {
        file1, _ := os.Open("sample1.jpg")
        file2, _ := os.Open("sample2.jpg")
        defer file1.Close()
        defer file2.Close()

        img1, _ := jpeg.Decode(file1)
        img2, _ := jpeg.Decode(file2)
        hash1, _ := goimagehash.AverageHash(img1)
        hash2, _ := goimagehash.AverageHash(img2)
        distance, _ := hash1.Distance(hash2)
        fmt.Printf("Distance between images: %v\n", distance)

        hash1, _ = goimagehash.DifferenceHash(img1)
        hash2, _ = goimagehash.DifferenceHash(img2)
        distance, _ = hash1.Distance(hash2)
        fmt.Printf("Distance between images: %v\n", distance)
        width, height := 8, 8
        hash3, _ := goimagehash.ExtAverageHash(img1, width, height)
        hash4, _ := goimagehash.ExtAverageHash(img2, width, height)
        distance, _ = hash3.Distance(hash4)
        fmt.Printf("Distance between images: %v\n", distance)
        fmt.Printf("hash3 bit size: %v\n", hash3.Bits())
        fmt.Printf("hash4 bit size: %v\n", hash4.Bits())

        var b bytes.Buffer
        foo := bufio.NewWriter(&b)
        _ = hash4.Dump(foo)
        foo.Flush()
        bar := bufio.NewReader(&b)
        hash5, _ := goimagehash.LoadExtImageHash(bar)
}