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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 7: Image Segmentation"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.23: Scilab_code_for_Differentiation_of_Gaussian_function.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: Scilab code for Differentiation of Gaussian function\n",
+"//Fig7.23\n",
+"//page388\n",
+"clc;\n",
+"close;\n",
+"sigma=input('Enter the value of sigma:')\n",
+"i=-10:.1:10;\n",
+"j=-10:.1:10;\n",
+"r=sqrt(i.*i+j.*j);\n",
+"y=(1/(sigma^2))*(((r.*r)/sigma^2)-1).*exp(-r.*r/2*sigma^2);\n",
+"plot(i,y)\n",
+"legend(sprintf('The sigma value is %g',sigma))\n",
+"xtitle('Differentiation of Gaussian function')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.25: Scilab_code_for_Differentiation_of_Gaussian_Filter_function.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: Scilab code for Differentiation of Gaussian Filter function\n",
+"//Fig7.25\n",
+"//page389\n",
+"clc;\n",
+"close;\n",
+"sigma1 = input('Enter the value of sigma1:')\n",
+"sigma2 = input('Enter the value of sigma2:')\n",
+"i=-10:.1:10;\n",
+"j=-10:.1:10;\n",
+"r=sqrt(i.*i+j.*j);\n",
+"y1 = (1/(sigma1^2))*(((r.*r)/sigma1^2)-1).*exp(-r.*r/2*sigma1^2);\n",
+"y2 = (1/(sigma2^2))*(((r.*r)/sigma2^2)-1).*exp(-r.*r/2*sigma2^2);\n",
+"y = y1-y2;\n",
+"plot(i,y)\n",
+"xtitle('Shape of DOG Filter')\n",
+"//Result\n",
+"//Enter the value of sigma1: 4\n",
+"//Enter the value of sigma2: 1\n",
+"// "
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.27: Scilab_code_for_Edge_Detection_using_Different_Edge_detectors.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: Scilab code for Edge Detection using Different Edge detectors \n",
+"//[1]. Sobel [2].Prewitt [3].Log  [4].Canny\n",
+"//Fig7.27\n",
+"//page389\n",
+"close;\n",
+"clc;\n",
+"a = imread('E:\DIP_JAYARAMAN\Chapter7\sailing.jpg');\n",
+"a = rgb2gray(a);\n",
+"c = edge(a,'sobel');\n",
+"d = edge(a,'prewitt');\n",
+"e = edge(a,'log');\n",
+"f = edge(a,'canny');\n",
+"ShowImage(a,'Original Image')\n",
+"title('Original Image')\n",
+"figure\n",
+"ShowImage(c,'Sobel')\n",
+"title('Sobel')\n",
+"figure\n",
+"ShowImage(d,'Prewitt')\n",
+"title('Prewitt')\n",
+"figure\n",
+"ShowImage(e,'Log')\n",
+"title('Log')\n",
+"figure\n",
+"ShowImage(f,'Canny')\n",
+"title('Canny')"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.30: Scilab_code_to_perform_watershed_transform.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Caption: Scilab code to perform watershed transform\n",
+"//Fig7.30\n",
+"//Page396\n",
+"clc;\n",
+"close;\n",
+"b = imread('E:\DIP_JAYARAMAN\Chapter7\teaset.png');\n",
+"a = rgb2gray(b);\n",
+"global EDGE_SOBEL;\n",
+"Gradient = EdgeFilter(a, EDGE_SOBEL);\n",
+"Threshold1 = CalculateOtsuThreshold(Gradient); // determine a threshold\n",
+"EdgeImage = ~SegmentByThreshold(Gradient,Threshold1);\n",
+"DistanceImage = DistanceTransform(EdgeImage);\n",
+"Threshold2 = CalculateOtsuThreshold(DistanceImage) // determine a threshold\n",
+"ThresholdImage = SegmentByThreshold(DistanceImage,Threshold2);\n",
+"MarkerImage = SearchBlobs(ThresholdImage);\n",
+"SegmentedImage = Watershed(Gradient,MarkerImage);\n",
+"figure\n",
+"ShowColorImage(b,'teaset')\n",
+"title('teaset.png')\n",
+"figure\n",
+"ColorMapLength = length(unique(SegmentedImage));\n",
+"ShowImage(SegmentedImage,'Result of Watershed Transform',jetcolormap(ColorMapLength)); "
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}