Image processing functions for blurring, thresholding and edge detection added

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diff --git a/2.3-1/macros/ImageProcessing/imgproc/CV_Erode.sci b/2.3-1/macros/ImageProcessing/imgproc/CV_Erode.sci
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+// Copyright (C) 2016 - IIT Bombay - FOSSEE
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+// Author: Siddhesh Wani
+// Organization: FOSSEE, IIT Bombay
+// Email: toolbox@scilab.in
+
+function cvtimg = CV_Erode(srcimg,erosion_type,erosion_size,iterations, ...
+					border_type,border_value)
+// Erodes an image by using a specific structuring element.
+//
+// Calling Sequence
+//     cvtimg = CV_Erode(srcimg,erosion_type,erosion_size,[iterations, ...
+//					border_type,border_value])
+// Parameters
+//     	src -> input image; the number of channels can be arbitrary, but the 
+//				depth should be one of CV_8U, CV_16U, CV_16S, CV_32F or CV_64F.
+//		erosion_type -> can be one of :	MORPH_RECT, MORPH_CROSS, MORPH_ELLIPSE	
+//		erosion_size -> size of kernel to be used for erosion. Must be odd
+//		iterations -> number of times erosion is applied.
+//		border_type -> pixel extrapolation method. It can be:
+//						BORDER_REPLICATE:     	aaaaaa|abcdefgh|hhhhhhh
+//						BORDER_REFLECT:       	fedcba|abcdefgh|hgfedcb
+//						BORDER_REFLECT_101:   	gfedcb|abcdefgh|gfedcba
+//						BORDER_WRAP:          	cdefgh|abcdefgh|abcdefg
+//						BORDER_CONSTANT:		iiiiii|abcdefgh|iiiiiii  
+//		border_value -> border value in case of a constant border 
+// Description
+//		This function can be used for eroding an image. Kernel used for erosion
+//		is decided by type and size. Size must always be odd. Anchor pint of
+//		kernel is always center of kernel. Input arguements 'iterations(1),
+//		border_type(BORDER_CONSTANT) and border_value' are optionals. Whwn not
+//		specified, default values as as mentioned in brackets. 
+// Examples
+//		img = CV_LoadImage('~/test.jpg',0)
+//		dst = CV_Erode(img,"MORPH_RECT",3,1,"BORDER_CONSTANT",0);
+//
+// See also
+//     CV_LoadImage CV_Dilate
+//
+// Authors
+//     Siddhesh Wani
+//
+cvtimg = 0
+// This is curretly dummy function. It provides no functionality but is required 
+// for providing support for generating C code for OpenCV
+
+endfunction