/** 
 * @brief Analyse an image with low concentration. 
 *
 * @param [in]  input              	Input image as 8bit (unsigned char) array.
 * @param [in]  inputWidth        	Width of the input image.
 * @param [in]  inputHeight        	Height of the input image.
 * @param [out] histogram          	Histogram of circle radii found in the image as int array.
 * @param [out] histogramWidth     	Width of the histogram.
 * @param [out] histogramHeight    	Height of the histogram.
 * @param [out] circleList         	List of the detected circles as int array.
 *                                 	Each row of this image corresponds to one circle:
 *                                 	The first column is the x-coordinate of the center,
 *                                 	the second column is the y-coordinate of the center,
 *                                 	the third column is the radius, and the fourth column
 *                                 	is 255.
 * @param [out] circleListWidth    	The width of the circleList, this is always 4.
 * @param [out] circleListHeight  	The height of the circleList, corresponding to the
 *                                	number of detected circles.
 * @param [out] display            	Displays the input image overlaid with the detected circles,
 *                                	as 8bit (unsigned char) array.
 *                                 	Width and height of this array are equal to the width and
 *                                 	height of the input image.
 *
 * NOTE: histogram, circleList and display are allocated inside the function, so make sure to
 *       free the corresponding memory to avoid memory leaks!
 */
PLUGIN_API void LowConcentrationAnalysis(unsigned char *input,
                                         int inputWidth,
                                         int inputHeight,
                                         int **histogram,
                                         int *histogramWidth,
                                         int *histogramHeight,
                                         int **circleList,
                                         int *circleListWidth,
                                         int *circleListHeight,
                                         unsigned char **display);

/** 
 * @brief Analyse an image with high concentration
 *
 * For a description of the parameters, see LowConcentrationAnalysis. 
 */ 
PLUGIN_API void HighConcentrationAnalysis(unsigned char *input,
                                          int inputWidth,
                                          int inputHeight,
                                          int **histogram,
                                          int *histogramWidth,
                                          int *histogramHeight,
                                          int **circleList,
                                          int *circleListWidth,
                                          int *circleListHeight,
                                          unsigned char **display);