318 lines
13 KiB
C++
318 lines
13 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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////////////////////////////////////////////////////////////////////////////////////////
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/*****************************************************************************************************
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USAGE:
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./opencv_annotation -images <folder location> -annotations <output file>
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Created by: Puttemans Steven - February 2015
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Adapted by: Puttemans Steven - April 2016 - Vectorize the process to enable better processing
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+ early leave and store by pressing an ESC key
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+ enable delete `d` button, to remove last annotation
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*****************************************************************************************************/
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#include <opencv2/core.hpp>
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#include <opencv2/highgui.hpp>
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#include <opencv2/imgcodecs.hpp>
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#include <opencv2/videoio.hpp>
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#include <opencv2/imgproc.hpp>
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#include <fstream>
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#include <iostream>
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#include <map>
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using namespace std;
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using namespace cv;
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// Function prototypes
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void on_mouse(int, int, int, int, void*);
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vector<Rect> get_annotations(Mat);
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// Public parameters
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Mat image;
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int roi_x0 = 0, roi_y0 = 0, roi_x1 = 0, roi_y1 = 0, num_of_rec = 0;
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bool start_draw = false, stop = false;
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// Window name for visualisation purposes
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const string window_name = "OpenCV Based Annotation Tool";
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// FUNCTION : Mouse response for selecting objects in images
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// If left button is clicked, start drawing a rectangle as long as mouse moves
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// Stop drawing once a new left click is detected by the on_mouse function
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void on_mouse(int event, int x, int y, int , void * )
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{
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// Action when left button is clicked
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if(event == EVENT_LBUTTONDOWN)
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{
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if(!start_draw)
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{
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roi_x0 = x;
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roi_y0 = y;
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start_draw = true;
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} else {
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roi_x1 = x;
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roi_y1 = y;
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start_draw = false;
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}
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}
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// Action when mouse is moving and drawing is enabled
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if((event == EVENT_MOUSEMOVE) && start_draw)
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{
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// Redraw bounding box for annotation
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Mat current_view;
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image.copyTo(current_view);
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rectangle(current_view, Point(roi_x0,roi_y0), Point(x,y), Scalar(0,0,255));
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imshow(window_name, current_view);
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}
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}
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// FUNCTION : returns a vector of Rect objects given an image containing positive object instances
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vector<Rect> get_annotations(Mat input_image)
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{
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vector<Rect> current_annotations;
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// Make it possible to exit the annotation process
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stop = false;
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// Init window interface and couple mouse actions
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namedWindow(window_name, WINDOW_AUTOSIZE);
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setMouseCallback(window_name, on_mouse);
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image = input_image;
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imshow(window_name, image);
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int key_pressed = 0;
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do
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{
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// Get a temporary image clone
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Mat temp_image = input_image.clone();
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Rect currentRect(0, 0, 0, 0);
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// Keys for processing
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// You need to select one for confirming a selection and one to continue to the next image
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// Based on the universal ASCII code of the keystroke: http://www.asciitable.com/
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// c = 99 add rectangle to current image
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// n = 110 save added rectangles and show next image
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// d = 100 delete the last annotation made
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// <ESC> = 27 exit program
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key_pressed = 0xFF & waitKey(0);
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switch( key_pressed )
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{
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case 27:
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stop = true;
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break;
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case 99:
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// Draw initiated from top left corner
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if(roi_x0<roi_x1 && roi_y0<roi_y1)
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{
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currentRect.x = roi_x0;
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currentRect.y = roi_y0;
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currentRect.width = roi_x1-roi_x0;
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currentRect.height = roi_y1-roi_y0;
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}
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// Draw initiated from bottom right corner
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if(roi_x0>roi_x1 && roi_y0>roi_y1)
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{
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currentRect.x = roi_x1;
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currentRect.y = roi_y1;
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currentRect.width = roi_x0-roi_x1;
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currentRect.height = roi_y0-roi_y1;
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}
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// Draw initiated from top right corner
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if(roi_x0>roi_x1 && roi_y0<roi_y1)
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{
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currentRect.x = roi_x1;
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currentRect.y = roi_y0;
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currentRect.width = roi_x0-roi_x1;
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currentRect.height = roi_y1-roi_y0;
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}
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// Draw initiated from bottom left corner
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if(roi_x0<roi_x1 && roi_y0>roi_y1)
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{
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currentRect.x = roi_x0;
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currentRect.y = roi_y1;
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currentRect.width = roi_x1-roi_x0;
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currentRect.height = roi_y0-roi_y1;
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}
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// Draw the rectangle on the canvas
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// Add the rectangle to the vector of annotations
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current_annotations.push_back(currentRect);
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break;
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case 100:
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// Remove the last annotation
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if(current_annotations.size() > 0){
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current_annotations.pop_back();
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}
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break;
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default:
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// Default case --> do nothing at all
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// Other keystrokes can simply be ignored
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break;
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}
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// Check if escape has been pressed
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if(stop)
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{
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break;
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}
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// Draw all the current rectangles onto the top image and make sure that the global image is linked
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for(int i=0; i < (int)current_annotations.size(); i++){
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rectangle(temp_image, current_annotations[i], Scalar(0,255,0), 1);
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}
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image = temp_image;
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// Force an explicit redraw of the canvas --> necessary to visualize delete correctly
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imshow(window_name, image);
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}
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// Continue as long as the next image key has not been pressed
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while(key_pressed != 110);
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// Close down the window
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destroyWindow(window_name);
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// Return the data
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return current_annotations;
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}
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int main( int argc, const char** argv )
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{
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// Use the cmdlineparser to process input arguments
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CommandLineParser parser(argc, argv,
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"{ help h usage ? | | show this message }"
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"{ images i | | (required) path to image folder [example - /data/testimages/] }"
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"{ annotations a | | (required) path to annotations txt file [example - /data/annotations.txt] }"
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"{ maxWindowHeight m | -1 | (optional) images larger in height than this value will be scaled down }"
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"{ resizeFactor r | 2 | (optional) factor for scaling down [default = half the size] }"
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);
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// Read in the input arguments
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if (parser.has("help")){
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parser.printMessage();
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cerr << "TIP: Use absolute paths to avoid any problems with the software!" << endl;
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return 0;
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}
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string image_folder(parser.get<string>("images"));
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string annotations_file(parser.get<string>("annotations"));
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if (image_folder.empty() || annotations_file.empty()){
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parser.printMessage();
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cerr << "TIP: Use absolute paths to avoid any problems with the software!" << endl;
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return -1;
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}
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int resizeFactor = parser.get<int>("resizeFactor");
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int const maxWindowHeight = parser.get<int>("maxWindowHeight") > 0 ? parser.get<int>("maxWindowHeight") : -1;
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// Start by processing the data
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// Return the image filenames inside the image folder
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map< String, vector<Rect> > annotations;
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vector<String> filenames;
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String folder(image_folder);
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glob(folder, filenames);
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// Add key tips on how to use the software when running it
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cout << "* mark rectangles with the left mouse button," << endl;
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cout << "* press 'c' to accept a selection," << endl;
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cout << "* press 'd' to delete the latest selection," << endl;
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cout << "* press 'n' to proceed with next image," << endl;
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cout << "* press 'esc' to stop." << endl;
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// Loop through each image stored in the images folder
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// Create and temporarily store the annotations
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// At the end write everything to the annotations file
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for (size_t i = 0; i < filenames.size(); i++){
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// Read in an image
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Mat current_image = imread(filenames[i]);
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bool const resize_bool = (maxWindowHeight > 0) && (current_image.rows > maxWindowHeight);
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// Check if the image is actually read - avoid other files in the folder, because glob() takes them all
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// If not then simply skip this iteration
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if(current_image.empty()){
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continue;
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}
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if(resize_bool){
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resize(current_image, current_image, Size(current_image.cols/resizeFactor, current_image.rows/resizeFactor), 0, 0, INTER_LINEAR_EXACT);
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}
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// Perform annotations & store the result inside the vectorized structure
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// If the image was resized before, then resize the found annotations back to original dimensions
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vector<Rect> current_annotations = get_annotations(current_image);
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if(resize_bool){
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for(int j =0; j < (int)current_annotations.size(); j++){
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current_annotations[j].x = current_annotations[j].x * resizeFactor;
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current_annotations[j].y = current_annotations[j].y * resizeFactor;
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current_annotations[j].width = current_annotations[j].width * resizeFactor;
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current_annotations[j].height = current_annotations[j].height * resizeFactor;
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}
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}
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annotations[filenames[i]] = current_annotations;
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// Check if the ESC key was hit, then exit earlier then expected
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if(stop){
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break;
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}
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}
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// When all data is processed, store the data gathered inside the proper file
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// This now even gets called when the ESC button was hit to store preliminary results
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ofstream output(annotations_file.c_str());
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if ( !output.is_open() ){
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cerr << "The path for the output file contains an error and could not be opened. Please check again!" << endl;
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return 0;
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}
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// Store the annotations, write to the output file
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for(map<String, vector<Rect> >::iterator it = annotations.begin(); it != annotations.end(); it++){
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vector<Rect> &anno = it->second;
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output << it->first << " " << anno.size();
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for(size_t j=0; j < anno.size(); j++){
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Rect temp = anno[j];
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output << " " << temp.x << " " << temp.y << " " << temp.width << " " << temp.height;
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}
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output << endl;
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}
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return 0;
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}
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