Accord.Tests.Imaging.IntegralImage2Test.GetSumTest C# (CSharp) Method

        public void GetSumTest()
        {
            byte[,] img = 
            {
                { 01, 02, 03, 04, 05, 06, 07, 08, 09,  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 }
            };

            // Create integral image
            Bitmap bmp = Accord.Imaging.Tools.ToBitmap(img);
            IntegralImage2 ii = IntegralImage2.FromBitmap(bmp, 0, true);


            // Horizontal rectangular feature
            int x = 6, y = 0, w = 3, h = 2;

            int expected = 7 + 8 + 9 + 17 + 18 + 19;
            long actual = ii.GetSum(x, y, w, h);

            Assert.AreEqual(expected, actual);
        }