/**
* Draw OpenCV matrix using QLabel
*/
void ImageApp::doSLIC()
{
processedImage = originalImage; //浅拷贝
//processedImage = originalImage.clone(); //深拷贝
float* image = new float[processedImage.rows*processedImage.cols*processedImage.channels()];
for (int i = 0; i < processedImage.rows; ++i) {
for (int j = 0; j < processedImage.cols; ++j) {
// Assuming three channels ...
image[j + processedImage.cols*i + processedImage.cols*processedImage.rows*0] = processedImage.at<cv::Vec3b>(i, j)[0];
image[j + processedImage.cols*i + processedImage.cols*processedImage.rows*1] = processedImage.at<cv::Vec3b>(i, j)[1];
image[j + processedImage.cols*i + processedImage.cols*processedImage.rows*2] = processedImage.at<cv::Vec3b>(i, j)[2];
}
}
// The algorithm will store the final segmentation in a one-dimensional array.
vl_uint32* segmentation = new vl_uint32[processedImage.rows*processedImage.cols];
vl_size height = processedImage.rows;
vl_size width = processedImage.cols;
vl_size channels = processedImage.channels();
// The region size defines the number of superpixels obtained.
// Regularization describes a trade-off between the color term and the
// spatial term.
vl_size region = 30;
float regularization = 10000.;
vl_size minRegion = 10;
vl_slic_segment(segmentation, image, width, height, channels, region, regularization, minRegion);
// Convert segmentation.
int** labels = new int*[processedImage.rows];
for (int i = 0; i < processedImage.rows; ++i) {
labels[i] = new int[processedImage.cols];
for (int j = 0; j < processedImage.cols; ++j) {
labels[i][j] = (int) segmentation[j + processedImage.cols*i];
}
}
int label = 0;
int labelTop = -1;
int labelBottom = -1;
int labelLeft = -1;
int labelRight = -1;
for (int i = 0; i < processedImage.rows; i++) {
for (int j = 0; j < processedImage.cols; j++) {
label = labels[i][j];
labelTop = label;
if (i > 0) {
labelTop = labels[i - 1][j];
}
labelBottom = label;
if (i < processedImage.rows - 1) {
labelBottom = labels[i + 1][j];
}
labelLeft = label;
if (j > 0) {
labelLeft = labels[i][j - 1];
}
labelRight = label;
if (j < processedImage.cols - 1) {
labelRight = labels[i][j + 1];
}
if (label != labelTop || label != labelBottom || label!= labelLeft || label != labelRight) {
processedImage.at<cv::Vec3b>(i, j)[0] = 0;
processedImage.at<cv::Vec3b>(i, j)[1] = 0;
processedImage.at<cv::Vec3b>(i, j)[2] = 255;
}
}
}
showImage(processedImage);
}
void
mexFunction(int nout, mxArray *out[],
int nin, const mxArray *in[])
{
enum {IN_IMAGE, IN_REGIONSIZE, IN_REGULARIZER, IN_END} ;
enum {OUT_SEGMENTATION = 0} ;
int verbose = 0 ;
int opt ;
int next = IN_END ;
mxArray const *optarg ;
float const * image ;
vl_size width ;
vl_size height ;
vl_size numChannels ;
vl_size regionSize ;
double regularizer ;
vl_uint32 * segmentation ;
int minRegionSize = -1 ;
VL_USE_MATLAB_ENV ;
/* -----------------------------------------------------------------
* Check the arguments
* -------------------------------------------------------------- */
if (nin < 3) {
vlmxError(vlmxErrInvalidArgument,
"At least three arguments are required.") ;
} else if (nout > 1) {
vlmxError(vlmxErrInvalidArgument,
"Too many output arguments.");
}
image = mxGetData(IN(IMAGE)) ;
if (!mxIsNumeric(IN(IMAGE)) || mxIsComplex(IN(IMAGE))) {
vlmxError(vlmxErrInvalidArgument, "IMAGE is not a real matrix.") ;
}
if (mxGetClassID(IN(IMAGE)) != mxSINGLE_CLASS) {
vlmxError(vlmxErrInvalidArgument, "IMAGE is not of class SINGLE.") ;
}
if (mxGetNumberOfDimensions(IN(IMAGE)) > 3) {
vlmxError(vlmxErrInvalidArgument, "IMAGE has more than three dimensions.") ;
}
width = mxGetDimensions(IN(IMAGE))[1] ;
height = mxGetDimensions(IN(IMAGE))[0] ;
if (mxGetNumberOfDimensions(IN(IMAGE)) == 2) {
numChannels = 1 ;
} else {
numChannels = mxGetDimensions(IN(IMAGE))[2] ;
}
if (!vlmxIsPlainScalar(IN(REGIONSIZE))) {
vlmxError(vlmxErrInvalidArgument, "REGIONSIZE is not a plain scalar.") ;
}
regionSize = mxGetScalar(IN(REGIONSIZE)) ;
if (regionSize < 1) {
vlmxError(vlmxErrInvalidArgument, "REGIONSIZE=%d is smaller than one.", regionSize) ;
}
if (!vlmxIsPlainScalar(IN(REGULARIZER))) {
vlmxError(vlmxErrInvalidArgument, "REGULARIZER is not a plain scalar.") ;
}
regularizer = mxGetScalar(IN(REGULARIZER)) ;
if (regularizer < 0) {
vlmxError(vlmxErrInvalidArgument, "REGULARIZER=%g is smaller than one.", regularizer) ;
}
while ((opt = vlmxNextOption (in, nin, options, &next, &optarg)) >= 0) {
switch (opt) {
case opt_verbose :
++ verbose ;
break ;
case opt_min_segment_size :
if (!vlmxIsPlainScalar(optarg)) {
vlmxError(vlmxErrInvalidArgument, "MINREGIONSIZE is not a plain scalar.") ;
}
minRegionSize = mxGetScalar(optarg) ;
if (minRegionSize < 0) {
vlmxError(vlmxErrInvalidArgument, "MINREGIONSIZE=%d is smaller than zero.", minRegionSize) ;
}
break ;
}
}
if (minRegionSize < 0) {
minRegionSize = (regionSize * regionSize) / (6*6) ;
}
if (verbose) {
mexPrintf("vl_slic: image = [%d x %d x %d]\n",
width, height, numChannels) ;
mexPrintf("vl_slic: regionSize = %d\n", regionSize) ;
mexPrintf("vl_slic: regularizer = %g\n", regularizer) ;
mexPrintf("vl_slic: minRegionSize = %d\n", minRegionSize) ;
}
/* -----------------------------------------------------------------
* Do work
* -------------------------------------------------------------- */
OUT(SEGMENTATION) = mxCreateNumericMatrix((mwSize)height, (mwSize)width, mxUINT32_CLASS, mxREAL) ;
segmentation = mxGetData(OUT(SEGMENTATION)) ;
vl_slic_segment(segmentation,
image, height, width, numChannels, /* the image is transposed */
regionSize, regularizer, minRegionSize) ;
}