imgaddnoise

Capsim Block Documentation

Short Description

Input an image and add the following noise to it: Uniform noise. Gaussian noise. Spike noise.

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Input Connections
Port Type Name
0 image_t x
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Output Connections
Port Type Name
0 image_t y
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Parameters
Num Description Type Name Default Value
0 Noise Type:0=none,1=uniform,2=normal,3=spike int type 1
1 Expression for seed generation file expression any_expression
2 param1: a(uniform), mean (normal) trigger(spike) float param1 0.0
3 param2: b(uniform), std (normal) multiplier(spike) float param2 1.0
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States
Num Type Name Initial Value Description
0 image_t img
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Declarations


 

	int no_samples;
	int i,j,k;
	float	norm;
	dsp_floatMatrix_t	matrix;
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Initialization Code



 

	SET_CELL_SIZE_IN(0,sizeof(image_t));
    SET_CELL_SIZE_OUT(0,sizeof(image_t));
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Main Code



 

/*
 * collect the image
 */
for (no_samples = MIN_AVAIL(); no_samples > 0; --no_samples) {
	/*
	 * input an image
	 */
	IT_IN(0);
	img=x(0);

	matrix.height=img.height;
	matrix.width=img.width;
	matrix.matrix_PP=img.image_PP;

	Dsp_MatrixAddNoise(&matrix,type,expression,param1,param2); 

        /*
         * Send image out
	 */

	img.width=matrix.width;
	img.height=matrix.height;
    	img.image_PP=matrix.matrix_PP;

	if(IT_OUT(0)) {
				KrnOverflow("imgaddnoise",0);
				return(99);
	}
	y(0) = img;
	
			
}
return(0);
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Wrapup Code
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License



/*  Capsim (r) Text Mode Kernel (TMK) Star Library (Blocks)
    Copyright (C) 1989-2002  XCAD Corporation 

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    http://capsimtmk.sourceforge.net
    XCAD Corporation
    Raleigh, North Carolina */
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Description



 

/* imgaddnoise.s */
/***********************************************************************
                             imgaddnoise()
************************************************************************
Input an image and add the following noise to it:
Uniform noise distributed between a(param1) and b(param2)
Gaussian noise with mean(param1) and std(param2) specified.
Spike noise generated as follows:
      a Normal distribution is generated. If its level exceeds
      param1, then its value is assigned to x.
      Next x is multiplied by param2 to obtain the spike.
      The spike value is then added to the matrix.
To generate different outcomes change the expression

imgaddnoise


Input an image and add the following noise to it:
Uniform noise distributed between a(param1) and b(param2)
Gaussian noise with mean(param1) and std(param2) specified.
Spike noise generated as follows:
      a Normal distribution is generated. If its level exceeds
      param1, then its value is assigned to x.
      Next x is multiplied by param2 to obtain the spike.
      The spike value is then added to the matrix.
To generate different outcomes change the expression


Programmer:  	Sasan Ardalan	
Date: 		September 10, 1993

*/