VISION-LIST Digest 1989 12 15

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VISION LIST Digest

 · 11 months ago

Vision-List Digest	Fri Dec 15 10:55:52 PDT 89 

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Today's Topics: 

 Re: range images 
 stereo pair images wanted 
 Moment Invariants 
 raster to matlab 

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Date: Mon, 11 Dec 89 13:54:28 BST 
From: Guanghua Zhang <guanghua%cs.heriot-watt.ac.uk@NSFnet-Relay.AC.UK> 
Subject: Re: range images 

It was mentioned before that several sets of range images can be obtained 
from the M. Rioux and L. Cournoyer. They can also provide with the registered 
pairs of the intensity and range images ( I think for one set ). But I don't  
know how they register the two images, two perspective, two orthogonal or  
one perspective and one orthogonal with converting parameters. 

 
Their address is: 
Photonics and Sensors Section 
Laboratory for Intelligent Systems'Division of Electrical Enfineering 
Natonal Research Council of Canada 
Ottawa, Otntario, Canada 
K1A 0R8   

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Date: Tue, 12 Dec 89 17:44 +0100 
From: KSEPYML%TUDRVA.TUDELFT.NL@CUNYVM.CUNY.EDU 
Subject: stereo pair images wanted 

I am in need of stereo pair images, both real world and constructed, as 
input for a human stereo-vision algorithm. 
Does anybody have such images available? 

Alexander G. van der Voort 
Koninklijke Shell Exploratie en Produktie Laboratorium 
Volmerlaan 6 
2288 GD Rijswijk 
The Netherlands 

[ As usual, please post answers to the List. 
		phil...	] 

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Date: 15 Dec 89 15:45:05 GMT 
From: Manickam Umasuthan <suthan%cs.heriot-watt.ac.uk@NSFnet-Relay.AC.UK> 
Subject: Moment Invariants 
Organization: Computer Science, Heriot-Watt U., Scotland 

I am very much interested to know whether any one has done research on 
the application of moment invariants to practical problems ( mainly 3D 
images using 3D moment invariants ). 

M.UMASUTHAN 

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Date: Fri, 8 Dec 89 15:03:17 PST 
From: ramin@scotty.Stanford.EDU (Ramin Samadani) 
Subject: raster to matlab 

Regarding raster to matlab conversion. I've taken some licensed stuff out of 
the code we use and came up with the following which has the main parts  
for converting a file containing unsigned chars (rows*cols of them) to a 
matlab readable format. It is currently hardwired for a vax but could 
easily be modified for suns and macs, etc. Also, since I took the licensed 
stuff out, the rows and cols are hardwired right now but that should be 
easy to fix. The code follows, with no guarantees at all!  

	Ramin Samadani 

 
/* imagetomat.c - writes a matrix matlab can 
 * 					read. Double format output,byte 
 *					format input for now. 
 * 
 * usage: matrix-name <in.hpl >out.mat 
 * 
 * to load: cc -o name name.c -O 
 * 
 * Ramin Samadani - 6 May 88 
 */ 
int rows = 128; 
int cols = 128; 

#include <stdio.h> 
typedef struct { 
	long type; /*type*/ 
	long mrows; /* row dimension */ 
	long ncols; /* column dimension */ 
	long imagf; /* flag indicating imag part */ 
	long namlen; /* name length (including NULL) */ 
	} Fmatrix; 
char *prog; 

main(argc,argv) 
        int argc; 
        char *argv[]; 
{ 
/* VARIABLES */ 
    int rows,cols, i,j; 
    unsigned char *ifr; 
    double *ofr; 
/* 
 * Matlab declarations  
 */ 
    char *pname; /* pointer to matrix name */ 
    float *pr; /* pointer to real data */ 
    FILE *fp; 
    Fmatrix x; 
    int mn; 

    prog = argv[0]; 

/* 
 * check passed parameters 
 */ 

    if (argc < 2) { 
        fprintf(stderr,"use: %s matrix name <filein  >fileout\n",prog); 
        exit(1); 
    } 
    if ((pname = (char *) calloc(80,sizeof(char))) == NULL) { 
        fprintf(stderr,"%s: can't allocate matrix name\n",prog); 
        exit(1); 
    } 
    pname = argv[1]; 
    x.type = 2000; 
    x.mrows = (long) cols; 
    x.ncols = (long) rows; 
    x.imagf = 0; 
    x.namlen = strlen(pname) + 1; 
    fprintf(stderr,"matrix %s has %ld rows, %ld cols, double precision\n", 
    	pname, x.mrows,x.ncols); 
    rows = rows; cols = cols; 

    if ((ifr = (unsigned char *) calloc(rows*cols,sizeof(char))) == NULL){ 
        fprintf(stderr,"%s: can't allocate input frame\n",prog); 
        exit(1); 
    } 
    if ((ofr = (double *) calloc(rows*cols,sizeof(double))) == NULL){ 
        fprintf(stderr,"%s: can't allocate output frame\n",prog); 
        exit(1); 
    } 
    if (read(0,ifr,rows*cols*sizeof(char)) == -1) { 
        fprintf(stderr,"%s: can't read frame\n",prog); 
        exit(1); 
    } 

/* MAIN PROCESSING */ 
    mn = x.mrows*x.ncols; 
    for (i = 0; i < mn; i++) { 
        ofr[i] = (double) (ifr[i]&0377); 
    } 
     

/* 
 * write the matrix 
 */ 
    if(write(1,&x,sizeof(Fmatrix)) != sizeof(Fmatrix)) { 
    	fprintf(stderr,"%s: can't write matrix header\n",prog); 
    	exit(1); 
    } 
    if(write(1,pname,(int)x.namlen*sizeof(char)) !=  
    		(int)x.namlen*sizeof(char)) { 
        fprintf(stderr,"%s: can't write name of matrix\n",prog); 
        exit(1); 
    } 
    if (write(1,ofr,mn*sizeof(double)) != mn*sizeof(double)){ 
        fprintf(stderr,"%s: can't write matrix data\n",prog); 
        exit(1); 
    } 
} 

 
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