コード例 #1
0
ファイル: edgemag.c プロジェクト: johnwan/ImageProcessing
void EdgeMag(int rows, int cols, unsigned char *img, float *edge_mag)
{
  int i,j;
  float max_mag,min_mag;
  short int *delta_x, *delta_y;
  short int *smoothedim;
  
  gaussian_smooth(img, rows, cols, &smoothedim);
  derrivative_x_y(smoothedim, rows, cols, &delta_x, &delta_y);
  free(smoothedim);
  magnitude_x_y(delta_x, delta_y, rows, cols, edge_mag);
  free(delta_x);
  free(delta_y);
  
  max_mag = -99999;
  min_mag = 99999;
  for (j=0; j<rows; j++)   
    for (i=0; i<cols; i++) {
      if (edge_mag[j*cols+i] > max_mag)
	max_mag = edge_mag[j*cols+i];
      if (edge_mag[j*cols+i] < min_mag)
	min_mag = edge_mag[j*cols+i];
    }


  for (j=0; j<rows; j++)   
    for (i=0; i<cols; i++)
      edge_mag[j*cols+i] = 255*(edge_mag[j*cols+i]-min_mag)/
	                       (max_mag-min_mag);
 
}
コード例 #2
0
ファイル: imageview.cpp プロジェクト: yajunyang/ImgP
//! Connect Image Processing Actions to Slots Methods
//!
void ImageView::connectActionToSlots()
{
  connect(ui->actionMid_Filter_2, SIGNAL(triggered()), this, SLOT(median_smoooth()));
  connect(ui->actionGaussian, SIGNAL(triggered()), this, SLOT(gaussian_smooth()));
  connect(ui->actionBilateral_Smooth,SIGNAL(triggered()), this, SLOT(bilateral_smooth()));
  connect(ui->actionGLCM, SIGNAL(triggered()), this, SLOT(gLCM()));
  connect(ui->actionCanny, SIGNAL(triggered()), this, SLOT(canny()));
  connect(ui->actionLecel_Set, SIGNAL(triggered()), this, SLOT(levelSetSegmentation()));
  connect(ui->actionVideo_Camera_Track, SIGNAL(triggered()), this, SLOT(videoCameraTrack()));
}
コード例 #3
0
static GstFlowReturn
gst_gaussianblur_transform_frame (GstVideoFilter * vfilter,
    GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
  GstGaussianBlur *filter = GST_GAUSSIANBLUR (vfilter);
  GstClockTime timestamp;
  gint64 stream_time;
  gfloat sigma;
  guint8 *src, *dest;

  /* GstController: update the properties */
  timestamp = GST_BUFFER_TIMESTAMP (in_frame->buffer);
  stream_time =
      gst_segment_to_stream_time (&GST_BASE_TRANSFORM (filter)->segment,
      GST_FORMAT_TIME, timestamp);

  GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
      GST_TIME_ARGS (timestamp));

  if (GST_CLOCK_TIME_IS_VALID (stream_time))
    gst_object_sync_values (GST_OBJECT (filter), stream_time);

  GST_OBJECT_LOCK (filter);
  sigma = filter->sigma;
  GST_OBJECT_UNLOCK (filter);

  if (filter->cur_sigma != sigma) {
    g_free (filter->kernel);
    filter->kernel = NULL;
    g_free (filter->kernel_sum);
    filter->kernel_sum = NULL;
    filter->cur_sigma = sigma;
  }
  if (filter->kernel == NULL &&
      !make_gaussian_kernel (filter, filter->cur_sigma)) {
    GST_ELEMENT_ERROR (filter, RESOURCE, NO_SPACE_LEFT, ("Out of memory"),
        ("Failed to allocation gaussian kernel"));
    return GST_FLOW_ERROR;
  }

  /*
   * Perform gaussian smoothing on the image using the input standard
   * deviation.
   */
  src = GST_VIDEO_FRAME_COMP_DATA (in_frame, 0);
  dest = GST_VIDEO_FRAME_COMP_DATA (out_frame, 0);
  gst_video_frame_copy (out_frame, in_frame);
  gaussian_smooth (filter, src, dest);

  return GST_FLOW_OK;
}
コード例 #4
0
ファイル: gstgaussblur.c プロジェクト: luisbg/gaudi_effects
static GstFlowReturn
gauss_blur_process_frame (GstBaseTransform * btrans,
    GstBuffer * in_buf, GstBuffer * out_buf)
{
  GaussBlur *gb = GAUSS_BLUR (btrans);
  GstClockTime timestamp;
  gint64 stream_time;
  gfloat sigma;

  /* GstController: update the properties */
  timestamp = GST_BUFFER_TIMESTAMP (in_buf);
  stream_time =
      gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);
  if (GST_CLOCK_TIME_IS_VALID (stream_time))
    gst_object_sync_values (G_OBJECT (gb), stream_time);

  GST_OBJECT_LOCK (gb);
  sigma = gb->sigma;
  GST_OBJECT_UNLOCK (gb);

  if (gb->cur_sigma != sigma) {
    g_free (gb->kernel);
    gb->kernel = NULL;
    g_free (gb->kernel_sum);
    gb->kernel_sum = NULL;
    gb->cur_sigma = sigma;
  }
  if (gb->kernel == NULL && !make_gaussian_kernel (gb, gb->cur_sigma)) {
    GST_ELEMENT_ERROR (btrans, RESOURCE, NO_SPACE_LEFT, ("Out of memory"),
        ("Failed to allocation gaussian kernel"));
    return GST_FLOW_ERROR;
  }

  /*
   * Perform gaussian smoothing on the image using the input standard
   * deviation.
   */
  memcpy (GST_BUFFER_DATA (out_buf), GST_BUFFER_DATA (in_buf),
      gb->height * gb->stride);
  gaussian_smooth (gb, GST_BUFFER_DATA (in_buf), GST_BUFFER_DATA (out_buf));

  return GST_FLOW_OK;
}
コード例 #5
0
/*******************************************************************************
* PROCEDURE: canny
* PURPOSE: To perform canny edge detection.
* NAME: Mike Heath
* DATE: 2/15/96
*******************************************************************************/
void canny(unsigned char *image, int rows, int cols, float sigma,
         float tlow, float thigh, unsigned char **edge, char *fname)
{
	FILE *fpdir=NULL;          /* File to write the gradient image to.     */
	unsigned char *nms;        /* Points that are local maximal magnitude. */
	short int *smoothedim,     /* The image after gaussian smoothing.      */
             *delta_x,         /* The first devivative image, x-direction. */
             *delta_y,         /* The first derivative image, y-direction. */
             *magnitude;       /* The magnitude of the gadient image.      */
	int r, c, pos;
	float *dir_radians=NULL;   /* Gradient direction image.                */
	
	pthread_t radian_thread;
	thread_args_t targs;
	int rc;
	void *status;
	
   /****************************************************************************
   * Perform gaussian smoothing on the image using the input standard
   * deviation.
   ****************************************************************************/
   if(VERBOSE) printf("Smoothing the image using a gaussian kernel.\n");
   gaussian_smooth(image, rows, cols, sigma, &smoothedim);

   /****************************************************************************
   * Compute the first derivative in the x and y directions.
   ****************************************************************************/
   if(VERBOSE) printf("Computing the X and Y first derivatives.\n");
   derrivative_x_y(smoothedim, rows, cols, &delta_x, &delta_y);

   /****************************************************************************
   * This option to write out the direction of the edge gradient was added
   * to make the information available for computing an edge quality figure
   * of merit.
   ****************************************************************************/
   if (fname != NULL){
      targs.delta_x = delta_x;
      targs.delta_y = delta_y;
      targs.rows = rows;
      targs.cols = cols;
      targs.fname = fname;
      
      rc = pthread_create(&radian_thread, NULL, radian_thread_function, (void *)&targs);
      if (rc){
         printf("ERROR; return code from pthread_create() is %d\n", rc);
         exit(-1);
      }
   }

   /****************************************************************************
   * Compute the magnitude of the gradient.
   ****************************************************************************/
   if(VERBOSE) printf("Computing the magnitude of the gradient.\n");
   magnitude_x_y(delta_x, delta_y, rows, cols, &magnitude);

   /****************************************************************************
   * Perform non-maximal suppression.
   ****************************************************************************/
   if(VERBOSE) printf("Doing the non-maximal suppression.\n");
   if((nms = (unsigned char *) calloc(rows*cols,sizeof(unsigned char)))==NULL){
      fprintf(stderr, "Error allocating the nms image.\n");
      exit(1);
   }

   non_max_supp(magnitude, delta_x, delta_y, rows, cols, nms);

   /****************************************************************************
   * Use hysteresis to mark the edge pixels.
   ****************************************************************************/
   if(VERBOSE) printf("Doing hysteresis thresholding.\n");
   if((*edge=(unsigned char *)calloc(rows*cols,sizeof(unsigned char))) ==NULL){
      fprintf(stderr, "Error allocating the edge image.\n");
      exit(1);
   }

   apply_hysteresis(magnitude, nms, rows, cols, tlow, thigh, *edge);
   
   if (fname != NULL){
      rc = pthread_join(radian_thread, &status);
      if (rc){
         printf("ERROR; return code from pthread_join() is %d\n", rc);
         exit(-1);
      }
   }
   
   /****************************************************************************
   * Free all of the memory that we allocated except for the edge image that
   * is still being used to store out result.
   ****************************************************************************/
   free(smoothedim);
   free(delta_x);
   free(delta_y);
   free(magnitude);
   free(nms);
}
コード例 #6
0
/*******************************************************************************
* PROCEDURE: canny
* PURPOSE: To perform canny edge detection.
* NAME: Mike Heath
* DATE: 2/15/96
*******************************************************************************/
void canny(unsigned char *image, int rows, int cols, float sigma,
           float tlow, float thigh, unsigned char **edge, char *fname)
{
    FILE *fpdir=NULL;          /* File to write the gradient image to.     */
    unsigned char *nms;        /* Points that are local maximal magnitude. */
    short int *smoothedim,     /* The image after gaussian smoothing.      */
          *delta_x,        /* The first devivative image, x-direction. */
          *delta_y,        /* The first derivative image, y-direction. */
          *magnitude;      /* The magnitude of the gadient image.      */
    float *dir_radians=NULL;   /* Gradient direction image.                */

    /****************************************************************************
    * Perform gaussian smoothing on the image using the input standard
    * deviation.
    ****************************************************************************/
    if(VERBOSE) printf("Smoothing the image using a gaussian kernel.\n");
    smoothedim = gaussian_smooth(image, rows, cols, sigma);

    /****************************************************************************
    * Compute the first derivative in the x and y directions.
    ****************************************************************************/
    if(VERBOSE) printf("Computing the X and Y first derivatives.\n");
    derrivative_x_y(smoothedim, rows, cols, &delta_x, &delta_y);

    /****************************************************************************
    * This option to write out the direction of the edge gradient was added
    * to make the information available for computing an edge quality figure
    * of merit.
    ****************************************************************************/
    if(fname != NULL)
    {
        /*************************************************************************
        * Compute the direction up the gradient, in radians that are
        * specified counteclockwise from the positive x-axis.
        *************************************************************************/
        radian_direction(delta_x, delta_y, rows, cols, &dir_radians, -1, -1);

        /*************************************************************************
        * Write the gradient direction image out to a file.
        *************************************************************************/
        if((fpdir = fopen(fname, "wb")) == NULL)
        {
            fprintf(stderr, "Error opening the file %s for writing.\n", fname);
            exit(1);
        }
        fwrite(dir_radians, sizeof(float), rows*cols, fpdir);
        fclose(fpdir);
        free(dir_radians);
    }

    /****************************************************************************
    * Compute the magnitude of the gradient.
    ****************************************************************************/
    /****************************************************************************
    * Allocate an image to store the magnitude of the gradient.
    ****************************************************************************/
    if((magnitude = (short *) malloc(rows*cols* sizeof(short))) == NULL)
    {
        fprintf(stderr, "Error allocating the magnitude image.\n");
        exit(1);
    }

    if(VERBOSE) printf("Computing the magnitude of the gradient.\n");
    magnitude_x_y(delta_x, delta_y, rows, cols, magnitude);

    /****************************************************************************
    * Perform non-maximal suppression.
    ****************************************************************************/
    if(VERBOSE) printf("Doing the non-maximal suppression.\n");
    if((nms = (unsigned char *) malloc(rows*cols*sizeof(unsigned char)))==NULL)
    {
        fprintf(stderr, "Error allocating the nms image.\n");
        exit(1);
    }
    non_max_supp(magnitude, delta_x, delta_y, rows, cols, nms);

    /****************************************************************************
    * Use hysteresis to mark the edge pixels.
    ****************************************************************************/
    if(VERBOSE) printf("Doing hysteresis thresholding.\n");
    if( (*edge=(unsigned char *)malloc(rows*cols*sizeof(unsigned char))) == NULL )
    {
        fprintf(stderr, "Error allocating the edge image.\n");
        exit(1);
    }
    apply_hysteresis(magnitude, nms, rows, cols, tlow, thigh, *edge);

    /****************************************************************************
    * Free all of the memory that we allocated except for the edge image that
    * is still being used to store out result.
    ****************************************************************************/
    free(smoothedim);
    free(delta_x);
    free(delta_y);
    free(magnitude);
    free(nms);
}
コード例 #7
0
/*******************************************************************************
* PROCEDURE: canny
* PURPOSE: To perform canny edge detection.
* NAME: Mike Heath
* DATE: 2/15/96
*******************************************************************************/
void canny(unsigned char *image, int rows, int cols, float sigma,
         float tlow, float thigh, unsigned char **edge)
{
   unsigned char *nms;        /* Points that are local maximal magnitude. */
   short int *smoothedim,     /* The image after gaussian smoothing.      */
             *delta_x,        /* The first devivative image, x-direction. */
             *delta_y,        /* The first derivative image, y-direction. */
             *magnitude;      /* The magnitude of the gadient image.      */
   float *dir_radians=NULL;   /* Gradient direction image.                */

   /****************************************************************************
   * Perform gaussian smoothing on the image using the input standard
   * deviation.
   ****************************************************************************/
   if(VERBOSE) mexPrintf("Smoothing the image using a gaussian kernel.\n");
   gaussian_smooth(image, rows, cols, sigma, &smoothedim);

   /****************************************************************************
   * Compute the first derivative in the x and y directions.
   ****************************************************************************/
   if(VERBOSE) mexPrintf("Computing the X and Y first derivatives.\n");
   derrivative_x_y(smoothedim, rows, cols, &delta_x, &delta_y);

   /****************************************************************************
   * Compute the magnitude of the gradient.
   ****************************************************************************/
   if(VERBOSE) mexPrintf("Computing the magnitude of the gradient.\n");
   magnitude_x_y(delta_x, delta_y, rows, cols, &magnitude);

   /****************************************************************************
   * Perform non-maximal suppression.
   ****************************************************************************/
   if(VERBOSE) mexPrintf("Doing the non-maximal suppression.\n");
   if((nms = (unsigned char *) calloc(rows*cols,sizeof(unsigned char)))==NULL){
      fprintf(stderr, "Error allocating the nms image.\n");
      exit(1);
   }

   non_max_supp(magnitude, delta_x, delta_y, rows, cols, nms);

   /****************************************************************************
   * Use hysteresis to mark the edge pixels.
   ****************************************************************************/
   if(VERBOSE) mexPrintf("Doing hysteresis thresholding.\n");
   if((*edge=(unsigned char *)calloc(rows*cols,sizeof(unsigned char))) ==NULL){
      fprintf(stderr, "Error allocating the edge image.\n");
      exit(1);
   }

   apply_hysteresis(magnitude, nms, rows, cols, tlow, thigh, *edge);

   /****************************************************************************
   * Free all of the memory that we allocated except for the edge image that
   * is still being used to store out result.
   ****************************************************************************/
   free(smoothedim);
   free(delta_x);
   free(delta_y);
   free(magnitude);
   free(nms);
}