f_point_of_interest.cpp
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//
// Created by Arnaud Blanchard on 22/12/15.
// Copyright ETIS 2015. All rights reserved.
//
#include "blc_channel.h"
#include "blc_program.h"
#include <unistd.h>
#include <math.h>
#define DEFAULT_OUTPUT_NAME ":point_of_interest<pid>"
#define IN(x,y) input.uchars[(x)+(y)*in_width]
/** See how to use Filter of Scharr
*
* -3 0 3
* -10 0 10
* -3 0 3 / 32
*
*/
int main(int argc, char **argv){
blc_channel input, output;
char const *output_name, *input_name;
int out_width, out_height, in_width, in_height;
int i, j, sobel;
blc_program_set_description("Find a points of interest on a image");
blc_program_add_option(&output_name, 'o', "output", "blc_channel-out", "channel name", DEFAULT_OUTPUT_NAME);
blc_program_add_parameter(&input_name, "blc_channel-in", 1, "image from where you want to find the points of interest", NULL);
blc_program_init(&argc, &argv, blc_quit);
blc_command_forward_blc_channels();
if (strcmp(output_name, DEFAULT_OUTPUT_NAME)==0) SYSTEM_ERROR_CHECK(asprintf((char**)&output_name,":point_of_interest%d", getpid()), -1, NULL);
input.open(input_name, BLC_CHANNEL_READ);
blc_loop_try_add_waiting_semaphore(input.sem_new_data);
blc_loop_try_add_posting_semaphore(input.sem_ack_data);
in_width=input.dims[0].length;
in_height=input.dims[1].length;
out_width=in_width-1;
out_height=in_height-1;
output.create_or_open(output_name, BLC_CHANNEL_WRITE, input.type, 'Y800', 2, out_width, out_height);
output.publish();
blc_loop_try_add_waiting_semaphore(output.sem_ack_data);
blc_loop_try_add_posting_semaphore(output.sem_new_data);
BLC_COMMAND_LOOP(0){
FOR(j, out_height){
FOR(i, out_width){
output.uchars[i+j*out_width]=CLIP_UCHAR((-IN(i, j)-IN(i+1, j)-IN(i+2, j)\
-IN(i, j+1)+8*IN(i+1, j+1)-IN(i+2, j+1)\
-IN(i, j+2)-IN(i+1, j+2)- IN(i+2, j+2))/8+128);
}
}
}
return EXIT_SUCCESS;
}