imgfilter

Capsim Block Documentation

Short Description

Input an image and filter it. The filter kernel is specified. It must be an ASCII file as follows:

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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 Filter Kernel file filterKernel filt.krn
1 1=free input image, 0= don't int freeImageFlag 0
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States
Num Type Name Initial Value Description
0 image_t img
1 dsp_floatMatrix_Pt filter_P
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Declarations


 

	int no_samples;
	int i,j,k;
	dsp_floatMatrix_Pt	filtered_P;
	dsp_floatMatrix_t	matrix;
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Initialization Code



 

	filter_P=Dsp_ReadAsciiMatrix(filterKernel);
	if(filter_P==NULL) {
		fprintf(stderr,"imgfilter: could not read filter kernel:%s\n",
			filterKernel); 
		return(1);
	}
    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;

	filtered_P=Dsp_ConvolveMatrices(&matrix,filter_P);
	if(filtered_P==NULL) {
		fprintf(stderr,"imgfilter: could not filter \n");
		return(2);
	}


        /*
         * Send image out
	 */
        if(freeImageFlag) {
               for(i=0; iwidth;
	img.height=filtered_P->height;
    	img.image_PP=filtered_P->matrix_PP;

	if(IT_OUT(0)) {
				KrnOverflow("imgfilter",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



 

/* imgfilter.s */
/***********************************************************************
                             imgfilter()
************************************************************************
Input an image and filter it.
The filter kernel is specified. It must be an ASCII file as follows:
numberOfColumns    numberOfRows
a00	a01	a02 
a10 	a11	a12
a20 	a21	a22
The above example is an 3x3 kernel

imgfilter


Input an image and filter it.
The filter kernel is specified. It must be an ASCII file as follows:
numberOfColumns    numberOfRows
a00	a01	a02 
a10 	a11	a12
a20 	a21	a22
The above example is an 3x3 kernel


Programmer:  	Sasan Ardalan	
Date: 		September 10, 1993

*/