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Commit b922d49a authored by StevenPuttemans's avatar StevenPuttemans
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vectorize process + enable early quitting/storage + enable delete annotion option

parent 06ea0aa0
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apps/annotation/opencv_annotation.cpp
View file @ b922d49a
......@@ -46,6 +46,9 @@ USAGE:
./opencv_annotation -images <folder location> -annotations <ouput file>
Created by: Puttemans Steven - February 2015
Adapted by: Puttemans Steven - April 2016 - Vectorize the process to enable better processing
+ early leave and store by pressing an ESC key
+ enable delete `d` button, to remove last annotation
*****************************************************************************************************/
#include <opencv2/core.hpp>
......@@ -68,16 +71,15 @@ using namespace cv;
// Function prototypes
void on_mouse(int, int, int, int, void*);
string int2string(int);
void get_annotations(Mat, stringstream*);
vector<Rect> get_annotations(Mat);
// Public parameters
Mat image;
int roi_x0 = 0, roi_y0 = 0, roi_x1 = 0, roi_y1 = 0, num_of_rec = 0;
bool start_draw = false;
bool start_draw = false, stop = false;
// Window name for visualisation purposes
const string window_name="OpenCV Based Annotation Tool";
const string window_name = "OpenCV Based Annotation Tool";
// FUNCTION : Mouse response for selecting objects in images
// If left button is clicked, start drawing a rectangle as long as mouse moves
......@@ -98,7 +100,8 @@ void on_mouse(int event, int x, int y, int , void * )
start_draw = false;
}
}
// Action when mouse is moving
// Action when mouse is moving and drawing is enabled
if((event == EVENT_MOUSEMOVE) && start_draw)
{
// Redraw bounding box for annotation
......@@ -109,42 +112,34 @@ void on_mouse(int event, int x, int y, int , void * )
}
}
// FUNCTION : snippet to convert an integer value to a string using a clean function
// instead of creating a stringstream each time inside the main code
string int2string(int num)
// FUNCTION : returns a vector of Rect objects given an image containing positive object instances
vector<Rect> get_annotations(Mat input_image)
{
stringstream temp_stream;
temp_stream << num;
return temp_stream.str();
}
vector<Rect> current_annotations;
// FUNCTION : given an image containing positive object instances, add all the object
// annotations to a known stringstream
void get_annotations(Mat input_image, stringstream* output_stream)
{
// Make it possible to exit the annotation
bool stop = false;
// Reset the num_of_rec element at each iteration
// Make sure the global image is set to the current image
num_of_rec = 0;
image = input_image;
// Make it possible to exit the annotation process
stop = false;
// Init window interface and couple mouse actions
namedWindow(window_name, WINDOW_AUTOSIZE);
setMouseCallback(window_name, on_mouse);
image = input_image;
imshow(window_name, image);
stringstream temp_stream;
int key_pressed = 0;
do
{
// Get a temporary image clone
Mat temp_image = input_image.clone();
Rect currentRect(0, 0, 0, 0);
// Keys for processing
// You need to select one for confirming a selection and one to continue to the next image
// Based on the universal ASCII code of the keystroke: http://www.asciitable.com/
// c = 99 add rectangle to current image
// n = 110 save added rectangles and show next image
// d = 100 delete the last annotation made
// <ESC> = 27 exit program
key_pressed = 0xFF & waitKey(0);
switch( key_pressed )
......@@ -154,31 +149,51 @@ void get_annotations(Mat input_image, stringstream* output_stream)
stop = true;
break;
case 99:
// Add a rectangle to the list
num_of_rec++;
// Draw initiated from top left corner
if(roi_x0<roi_x1 && roi_y0<roi_y1)
{
temp_stream << " " << int2string(roi_x0) << " " << int2string(roi_y0) << " " << int2string(roi_x1-roi_x0) << " " << int2string(roi_y1-roi_y0);
currentRect.x = roi_x0;
currentRect.y = roi_y0;
currentRect.width = roi_x1-roi_x0;
currentRect.height = roi_y1-roi_y0;
}
// Draw initiated from bottom right corner
if(roi_x0>roi_x1 && roi_y0>roi_y1)
{
temp_stream << " " << int2string(roi_x1) << " " << int2string(roi_y1) << " " << int2string(roi_x0-roi_x1) << " " << int2string(roi_y0-roi_y1);
currentRect.x = roi_x1;
currentRect.y = roi_y1;
currentRect.width = roi_x0-roi_x1;
currentRect.height = roi_y0-roi_y1;
}
// Draw initiated from top right corner
if(roi_x0>roi_x1 && roi_y0<roi_y1)
{
temp_stream << " " << int2string(roi_x1) << " " << int2string(roi_y0) << " " << int2string(roi_x0-roi_x1) << " " << int2string(roi_y1-roi_y0);
currentRect.x = roi_x1;
currentRect.y = roi_y0;
currentRect.width = roi_x0-roi_x1;
currentRect.height = roi_y1-roi_y0;
}
// Draw initiated from bottom left corner
if(roi_x0<roi_x1 && roi_y0>roi_y1)
{
temp_stream << " " << int2string(roi_x0) << " " << int2string(roi_y1) << " " << int2string(roi_x1-roi_x0) << " " << int2string(roi_y0-roi_y1);
currentRect.x = roi_x0;
currentRect.y = roi_y1;
currentRect.width = roi_x1-roi_x0;
currentRect.height = roi_y0-roi_y1;
}
rectangle(input_image, Point(roi_x0,roi_y0), Point(roi_x1,roi_y1), Scalar(0,255,0), 1);
// Draw the rectangle on the canvas
// Add the rectangle to the vector of annotations
current_annotations.push_back(currentRect);
break;
case 100:
// Remove the last annotation
if(current_annotations.size() > 0){
current_annotations.pop_back();
}
break;
default:
// Default case --> do nothing at all
// Other keystrokes can simply be ignored
break;
}
......@@ -187,19 +202,24 @@ void get_annotations(Mat input_image, stringstream* output_stream)
{
break;
}
// Draw all the current rectangles onto the top image and make sure that the global image is linked
for(int i=0; i < (int)current_annotations.size(); i++){
rectangle(temp_image, current_annotations[i], Scalar(0,255,0), 1);
}
image = temp_image;
// Force an explicit redraw of the canvas --> necessary to visualize delete correctly
imshow(window_name, image);
}
// Continue as long as the next image key has not been pressed
while(key_pressed != 110);
// If there are annotations AND the next image key is pressed
// Write the image annotations to the file
if(num_of_rec>0 && key_pressed==110)
{
*output_stream << " " << num_of_rec << temp_stream.str() << endl;
}
// Close down the window
destroyWindow(window_name);
// Return the data
return current_annotations;
}
int main( int argc, const char** argv )
......@@ -209,13 +229,13 @@ int main( int argc, const char** argv )
cout << "Usage: " << argv[0] << endl;
cout << " -images <folder_location> [example - /data/testimages/]" << endl;
cout << " -annotations <ouput_file> [example - /data/annotations.txt]" << endl;
cout << "TIP: Use absolute paths to avoid any problems with the software!" << endl;
return -1;
}
// Read in the input arguments
string image_folder;
string annotations;
string annotations_file;
for(int i = 1; i < argc; ++i )
{
if( !strcmp( argv[i], "-images" ) )
......@@ -224,7 +244,7 @@ int main( int argc, const char** argv )
}
else if( !strcmp( argv[i], "-annotations" ) )
{
annotations = argv[++i];
annotations_file = argv[++i];
}
}
......@@ -249,14 +269,9 @@ int main( int argc, const char** argv )
}
#endif
// Create the outputfilestream
ofstream output(annotations.c_str());
if ( !output.is_open() ){
cerr << "The path for the output file contains an error and could not be opened. Please check again!" << endl;
return 0;
}
// Start by processing the data
// Return the image filenames inside the image folder
vector< vector<Rect> > annotations;
vector<String> filenames;
String folder(image_folder);
glob(folder, filenames);
......@@ -274,14 +289,32 @@ int main( int argc, const char** argv )
continue;
}
// Perform annotations & generate corresponding output
stringstream output_stream;
get_annotations(current_image, &output_stream);
// Perform annotations & store the result inside the vectorized structure
vector<Rect> current_annotations = get_annotations(current_image);
annotations.push_back(current_annotations);
// Check if the ESC key was hit, then exit earlier then expected
if(stop){
break;
}
}
// When all data is processed, store the data gathered inside the proper file
// This now even gets called when the ESC button was hit to store preliminary results
ofstream output(annotations_file.c_str());
if ( !output.is_open() ){
cerr << "The path for the output file contains an error and could not be opened. Please check again!" << endl;
return 0;
}
// Store the annotations, write to the output file
if (output_stream.str() != ""){
output << filenames[i] << output_stream.str();
// Store the annotations, write to the output file
for(int i = 0; i < (int)annotations.size(); i++){
output << filenames[i] << " " << annotations[i].size();
for(int j=0; j < (int)annotations[i].size(); j++){
Rect temp = annotations[i][j];
output << " " << temp.x << " " << temp.y << " " << temp.width << " " << temp.height;
}
output << endl;
}
return 0;
......
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