// Executes all of the canny stages
void ImageProcessor::Canny() {
Gaussian();
Sobel();
NonMaxSuppression();
HysteresisThresholding();
}
int main( int argc, char* argv[] )
{
char nameImageIn[256];
char nameImageOut[256];
int nbNames = 0;
int status, i;
void *bufferIn = (void*)NULL;
void *bufferOut = (void*)NULL;
int bufferDims[3] = {0,0,0};
int nbytes;
bufferType TYPE = UCHAR;
double low = 1.0;
double high = 1.0;
int size = 1;
strcpy( program, argv[0] );
if ( argc == 1 ) ErrorMessage( "\n", 1 );
for ( i=1; i<argc; i++ ) {
if ( argv[i][0] == '-' ) {
if ( (strcmp ( argv[i], "-help" ) == 0) ||
(strcmp ( argv[i], "-h" ) == 0) ) {
ErrorMessage( "help message\n", 1 );
}
else if ( (strcmp ( argv[i], "-verbose" ) == 0) ||
(strcmp ( argv[i], "-v" ) == 0) ) {
Connexe_verbose();
}
else if ( (strcmp ( argv[i], "-no-verbose" ) == 0) ||
(strcmp ( argv[i], "-nv" ) == 0) ) {
Connexe_noverbose();
}
else if ( (strcmp ( argv[i], "-low-threshold" ) == 0) ||
(strcmp ( argv[i], "-lt" ) == 0) ) {
i += 1;
if ( i >= argc) ErrorMessage( "parsing -low-threshold...\n", 0 );
status = sscanf( argv[i], "%lf", &low );
if ( status <= 0 ) ErrorMessage( "parsing -low-threshold...\n", 0 );
}
else if ( (strcmp ( argv[i], "-high-threshold" ) == 0) ||
(strcmp ( argv[i], "-ht" ) == 0) ) {
i += 1;
if ( i >= argc) ErrorMessage( "parsing -high-threshold...\n", 0 );
status = sscanf( argv[i],"%lf", &high );
if ( status <= 0 ) ErrorMessage( "parsing -high-threshold...\n", 0 );
}
else if ( (strcmp ( argv[i], "-minimal-size" ) == 0) ||
(strcmp ( argv[i], "-ms" ) == 0) ) {
i += 1;
if ( i >= argc) ErrorMessage( "parsing -minimal-size...\n", 0 );
status = sscanf( argv[i],"%d", &size );
if ( status <= 0 ) ErrorMessage( "parsing -minimal-size...\n", 0 );
}
else {
sprintf( nameImageIn, "unknown option %s\n", argv[i] );
ErrorMessage( nameImageIn, 0);
}
}
else if ( argv[i][0] != 0 ) {
if ( nbNames == 0 ) {
strcpy( nameImageIn, argv[i] );
}
else if ( nbNames == 1 ) {
strcpy( nameImageOut, argv[i] );
}
else {
sprintf( nameImageIn, "too many image name (%s)\n", argv[i] );
ErrorMessage( nameImageIn, 0);
}
nbNames ++;
}
}
bufferIn = _readPnmImage( nameImageIn, &bufferDims[0], &bufferDims[1], &bufferDims[2], &nbytes );
if ( nbytes == 2 ) TYPE = USHORT;
bufferOut = (void*)malloc( bufferDims[0] * bufferDims[1] * bufferDims[2] * sizeof(unsigned char) );
fprintf( stderr, "%s: processing with thresholds = %f %f\n", argv[0], low, high );
/*
* to change the connectivity -> Connexe_SetConnectivity
* to change the minimal size of the connected components to be kept.
* -> Connexe_SetMinimumSizeOfComponents
* to change the maximum number of the connected components to be kept.
* -> Connexe_SetMaximumNumberOfComponents
*/
Connexe_SetMinimumSizeOfComponents( size );
if ( HysteresisThresholding( bufferIn, TYPE,
bufferOut, UCHAR,
bufferDims,
low, high ) < 0 ) {
fprintf( stderr, " processing failed.\n" );
exit( 1 );
}
/* there exists a more complete function (with more parameters)
=> HysteresisThresholdingWithAllParams()
see connexe.h
*/
_writePnmImage( nameImageOut, bufferDims[0], bufferDims[1], bufferDims[2], 1, bufferOut );
}
