bbiwarg-original/bbiwarg/Images/DepthImage.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Emgu.CV;
using Emgu.CV.Structure;

using System.Diagnostics;

namespace bbiwarg.Images
{
    class DepthImage
    {
        public Image<Gray, Int16> Image { get; private set; }
        public int Width { get; private set; }
        public int Height { get; private set; }
        public Int16 MinDepth { get; private set; }
        public Int16 MaxDepth { get; private set; }

        public DepthImage(Image<Gray, Int16> image)
        {
            this.Image = image;
            Width = image.Width;
            Height = image.Height;

            //smooth
            this.Image = image.SmoothMedian(3);
            
            //threshold min&maxDepth
            MinDepth = (Int16)findMinDepth();
            MaxDepth = (Int16)(MinDepth + 200);

            thresholdDepth(MaxDepth);
        }

        public Int16 getDepthAt(Point point)
        {
            return getDepthAt(point.X, point.Y);
        }

        public Int16 getDepthAt(int x, int y)
        {
            return Image.Data[y, x, 0];
        }

        public void setDepthAt(Point point, Int16 depth)
        {
            setDepthAt(point.X, point.Y, depth);
        }

        public void setDepthAt(int x, int y, Int16 depth)
        {
            Image.Data[y, x, 0] = depth;
        }

        public float getRelativeDepthAt(Point point)
        {
            return getRelativeDepthAt(point.X, point.Y);
        }

        public float getRelativeDepthAt(int x, int y)
        {
            float minMaxInterval = Math.Max(MaxDepth - MinDepth, 1);
            return (getDepthAt(x, y) - MinDepth) / minMaxInterval;
        }

        public Int16 getMinDepth()
        {
            return MinDepth;
        }

        public Int16 getMaxDepth()
        {
            return MaxDepth;
        }

        private Int16 findMinDepth()
        {
            // min and max values
            double[] min, max;
            // min and max locations
            Point[] minLoc, maxLoc;

            Image.MinMax(out min, out max, out minLoc, out maxLoc);
            
            return (Int16) min[0];
        }

        private void thresholdDepth(Int16 max)
        {
            // newDepth = (depth > max) ? max : depth;
            Image = Image.ThresholdTrunc(new Gray(max));
        }
    }
}