klabel/labeler.html at master · kayvonf/klabel · GitHub

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<!DOCTYPE html>
<html>
<head>
<title>Image Labeling</title>

<link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap" rel="stylesheet">

<style>

	body {
		font-family: Open sans, Arial, sans-serif;
		font-size: 10pt;
		font-weight: 400;
		color: #606060;
		background: #ffffff;
	}

	body a {
		color: #808080;
	}

	body a:hover {
		text-decoration: underline;
	}

	body h3 {
		font-size: 10pt;
		color: #000000;
	}

	button {
	  background-color: #a2a2a2;
	  border: none;
	  color: #ffffff;
	  padding: 2px 6px;
	  border-radius: 3px;
	  text-align: center;
	  display: inline-block;
	}

	button:hover {
		background-color: #808080;
	}

	.category_help_item {
		background-color: #c0c0c0;
		color: #ffffff;
		border-radius: 4px;
		padding: 2px 5px 2px 5px;
		margin-right: 5px;
	}

</style>

<script src="js/kmath.js"></script>
<script src="js/klabel.js"></script>

<script>

	var labeler = new ImageLabeler;

	var task_id;
	var num_datapoints = 0;
	var description = "";
	var image_urls = [];
	var model_scores = [];
	var user_labels = [];

	var labeler_stats_div;
	var cursor_el;

	var annotations_since_last_save = 0;

 // fetch documentation
 // https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch

	function handle_start_labeling_task() {

		var task_input_el = document.getElementById("task_id_box");
		var labeler_name_input_el = document.getElementById("labeler_id_box");

		task_id = task_input_el.value;
		var labeler_name = labeler_name_input_el.value.toLowerCase();

		if (labeler_name.length == 0) {
			alert("Please enter a labeler name");
			return false;
		}

		// now need to go get the data

		var fetch_task_url = "/labeling_api/get_task?" + new URLSearchParams({task_id: task_id});

		console.log(task_id);

		fetch(fetch_task_url)
 			.then(response => {
 				if (response.status !== 200) {
 					console.log("problem: " + response.status);
 				}
 				return response.json();
			})
			.then(task_info => {

				task_id = task_info.task_id;
				description = task_info.description;
				category_mapping = task_info.categories;

				datapoint_urls = task_info.datapoint_urls;
				num_datapoints = datapoint_urls.length;

				console.log("Task description: " + description);
				console.log("Num datapoints: " + num_datapoints);

				// check to see if existing labels for the current labeler exist
				var existing_labels = null;
				var existing_labeling_times = null;
				Object.entries(task_info.labeler_results).forEach( entry => {
					if (entry[0] == labeler_name) {

						existing_labels = entry[1].labels;
						console.log("Existing labels for " + labeler_name + " exist.");

						if (entry[1].hasOwnProperty("labeling_times")) {
							existing_labeling_times = entry[1].labeling_times;
							console.log("Labeling times for " + labeler_name + " exist.");
						}
					}
				});

				var image_data = [];
				for (var i=0; i<num_datapoints; i++) {
					var data = new ImageData;
					data.source_url = datapoint_urls[i];

					// populate with existing labels if they exist
					if (existing_labels && existing_labels[i] != Annotation.INVALID_CATEGORY)
						data.annotations.push(new PerFrameAnnotation(existing_labels[i]));

					if (existing_labeling_times)
						data.labeling_time = existing_labeling_times[i];

					image_data.push(data);
				}

				// fill in task information in the UI

				var task_info_div = document.getElementById("task_info_div");

				var str = "";
				str += "<div>" + description + "</div>"
				task_info_div.innerHTML = str;

				var labeler_help_div = document.getElementById("labeler_help_div");

				// update the keyboard help based on the category mappings

				var entries = Array(10).fill("");
				Object.entries(category_mapping).forEach( entry => {
					var category_name = entry[0];
					var key_code = entry[1].value;
					entries[key_code] = category_name;
				});

				var help_str = "Keyboard help: ";
				for (var i=0; i<10; i++) {
					var idx = (idx == 9) ? 0 : i+1;
					if (entries[idx] != "") {
						help_str += "<span class=\"category_help_item\">";
						help_str += "" + idx + ": " + entries[idx];
						help_str += "</span>";
					}
				}
				labeler_help_div.innerHTML = help_str;

				// make the labeling UI visible

				var main_div = document.getElementById("main_div");
				main_div.style.visibility = "visible";

				// setup klabeler widget

				labeler.load_image_stack(image_data);
				labeler.set_categories(category_mapping);
				labeler.set_focus();

				// update the labeler stats

				update_labeler_stats();

			})
 			.catch(err => {
 				console.log('Error fetching task info: ', err);
 			});

	}

	function klabel_annotations_to_labels(klabel_annotations) {
		var labels = [];
		klabel_annotations.forEach( img => {
			if (img.annotations.length == 0 ||
				img.annotations[0].type != Annotation.ANNOTATION_MODE_PER_FRAME_CATEGORY) {
				labels.push(-1);
			} else {
				labels.push(img.annotations[0].value);
			}
		});

		return labels;
	}

	function update_labeler_stats() {

		var labels = klabel_annotations_to_labels(labeler.get_annotations());
		var label_counts = Array(10).fill(0);
		labels.forEach( label => {
			if (label != Annotation.INVALID_CATEGORY)
				label_counts[label]++;
		});

		// FIXME(kayvonf): do this on init. Code duplication with keyboard help.
		var category_names = Array(10).fill("");
		Object.entries(category_mapping).forEach( entry => {
			var category_name = entry[0];
			var category_value = entry[1].value;
			category_names[category_value] = category_name;
		});

		var str = "";
		for (var i=0; i<10; i++) {
			var idx = (i+1 < 10) ? i+1 : 0;
			if (category_names[idx] != "") {
				str += "<div style=\"padding-top: 2px;\">";
				str += "<button type=\"button\" onclick=\"handle_goto_next_by_category(" + idx + ")\">Next</button> ";
				str += category_names[idx] + ": " + label_counts[idx] + "</div>"
			}
		}

		labeler_stats_div.innerHTML = str;
	}

	function handle_save_results() {

		var labeler_name_input_el = document.getElementById("labeler_id_box");
		var labeler_name = labeler_name_input_el.value;

		// the annotations from klabler
		var klabel_annotations = labeler.get_annotations();
		var labels = klabel_annotations_to_labels(klabel_annotations);

		var labeling_times = [];
		klabel_annotations.forEach( img => {
			labeling_times.push(img.labeling_time);
		});

		var labeling_results = {
			task_id: task_id,
			labeler_name: labeler_name,
			labels: labels,
			labeling_times: labeling_times
		};

		annotations_since_last_save = 0;

		fetch('/labeling_api/store_labels', {
			method: 'POST',
			headers: {'Content-Type': 'application/json'},
  			body: JSON.stringify(labeling_results),
		})
			.then(response => {
	 			if (response.status !== 200) {
	 				console.log("problem: " + response.status);
	 			}
	 			return response.json();
			})
			.then(data => {
	  			console.log('Success:', data);
			})
			.catch(error => {
	  			console.error('Error:', error);
			});
	}

	function handle_annotation_changed() {

		update_labeler_stats();

		annotations_since_last_save++;

		// save every 10 annotations
		if (annotations_since_last_save > 10)
			handle_save_results();
	}

	function handle_frame_changed(frame_num) {
		cursor_el.innerHTML = "Image " + frame_num + " of " + num_datapoints;
	}

	function handle_goto_first() {
		labeler.set_current_frame_num(0);
	}

	function handle_goto_last() {
		labeler.set_current_frame_num(num_datapoints-1);
	}

	function handle_goto_next_by_category(cat) {
		var labels = klabel_annotations_to_labels(labeler.get_annotations());
		var current_frame_num = labeler.get_current_frame_num();

		// search from the current frame forward
		for (var i=current_frame_num+1; i<num_datapoints; i++) {
			if (labels[i] == cat) {
				labeler.set_current_frame_num(i);
				return;
			}
		}

		// start back at the start and search up to the current frame num
		for (var i=0; i<current_frame_num; i++) {
			if (labels[i] == cat) {
				labeler.set_current_frame_num(i);
				return;
			}
		}
	}

	function handle_goto_next_unlabeled() {
		handle_goto_next_by_category(Annotation.INVALID_CATEGORY);
	}

	function handle_onload() {

		cursor_el = document.getElementById("cursor_el");
		labeler_stats_div = document.getElementById("labeler_stats_div");

		const url_params = new URLSearchParams(window.location.search);
		if (url_params.has("task_id")) {
    		var el = document.getElementById("task_id_box");
    		el.value = url_params.get("task_id");
		}
		if (url_params.has("labeler")) {
    		var el = document.getElementById("labeler_id_box");
    		el.value = url_params.get("labeler");
		}

		var main_canvas = document.getElementById("main_canvas");

		labeler.init(main_canvas);
		labeler.set_frame_changed_listener(handle_frame_changed);
		labeler.set_annotation_changed_listener(handle_annotation_changed);
		labeler.set_keypress_annotation_mode(Annotation.ANNOTATION_MODE_PER_FRAME_CATEGORY);
		labeler.set_click_annotation_mode(Annotation.ANNOTATION_MODE_NONE);
		labeler.set_play_audio(false);
		labeler.set_letterbox(true);
		labeler.set_retain_zoom(false);
		labeler.set_crosshairs_viz(false);
		labeler.set_background_color("#e0e0e0");
	}

</script>

</head>

<body onload="handle_onload()">

<div>
	Task: <input type="text" id="task_id_box" style="width: 300px;" onchange="" />
	Labeler: <input type="text" id="labeler_id_box" style="width: 250px" onchange="" />
	<button id="get_data_button" type="button" onclick="handle_start_labeling_task()">Get Task</button>
	<button id="post_results_button" type="button" onclick="handle_save_results()">Save Results</button>
</div>

<div id="main_div" style="visibility: hidden;">
<div id="task_info_div" style="padding: 4px 0px 4px 0px; font-style: italic;"></div>
<div>
	<canvas id="main_canvas" width="960" height="500" tabindex="0" style="border: 1px solid #c0c0c0;" ></canvas>
</div>
<div style="padding-top: 6px;">
	<span id="cursor_el" style="width: 100px;"></span>
    <button id="get_data_button" type="button" onclick="handle_goto_first()">First</button>
    <button id="get_data_button" type="button" onclick="handle_goto_next_unlabeled()">Next Unlabeled</button>
	<button id="post_results_button" type="button" onclick="handle_goto_last()">Last</button>
</div>
<div id="labeler_help_div" style="padding-top: 6px;"></div>
<h3>Label Counts</h3>
<div id="labeler_stats_div"></div>
</div>
</p>

</body>
</html>