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bbox.html
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<html>
<head>
<title>Describe images with text</title>
<!-- amtbase depends on these libraries -->
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/json3/3.3.2/json3.min.js'></script>
<!-- end of required libraries -->
<script src='https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.6.0/underscore-min.js'></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet">
<script src='https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js'></script>
<script src="https://visualgenome.org/static/js/VG/bleu.js"></script>
<script src="https://visualgenome.org/static/js/VG/iou.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.2/raphael-min.js'></script>
<script src="https://visualgenome.org/static/js/VG/utils.js"></script>
<script src="https://visualgenome.org/static/js/VG/colors.js"></script>
<script src="https://visualgenome.org/static/js/VG/text-box.js"></script>
<script src="https://visualgenome.org/static/js/VG/circle-object.js"></script>
<script src="https://visualgenome.org/static/js/VG/image-canvas.js"></script>
<script src="https://visualgenome.org/static/js/VG/open-sentences-backbone-lib.js"></script>
<script src='https://visualgenome.org/static/js/VG/visualize_single_image.js'></script>
<script src='https://visualgenome.org/static/OpenSentences/open-sentences-lib.js'></script>
<style>
#text-area {
font-size: 20pt;
width:500px;
margin-top: 10px;
margin-left: auto;
margin-right: auto;
height: 100px;
}
#button-div {
margin-bottom: 10px;
}
#counter {
margin: 0 10px;
font-size: 20pt;
font-weight: bold;
}
.desc {
font-size: 14pt;
}
#image-container {
min-height: 500px;
}
#gif-container {
/*min-height: 500px;*/
}
.entity-example-container {
display: flex;
justify-content: space-around;
margin-top: 25px;
margin-bottom: 25px;
}
.entity-example {
height: 300px;
}
.red {
background-color: red;
color: white;
}
.green {
background-color: green;
color: white;
}
.reference-container {
background-color: aliceblue;
padding: 10px;
}
.workspace-container {
background-color: cornsilk;
padding: 10px;
}
</style>
</head>
<body>
<div class='container'>
<h2>Draw the bounding boxes of objects.</h2>
<div class="desc">
<!-- <p><h3>What's going inside the bounding boxes?</h3> -->
<p>We'll be going through a list of objects occurring in videos.</p>
<p><b>Objects</b> are things that appear in the image, like cat, grass, or jacket. Draw a bounding box around each object in the list.</p>
<h3>How should the bounding box be drawn?</h3>
<ul>
<li>You'll be given the object to look for. Draw a box with your mouse around the relevant image region.</li>
<li>
Each box should be <b>tight</b> around its object, and should <b>completely cover</b> the object.
<div class='row text-center'>
<div class='col-md-4 bbox-example bg-success'>
<b>Good:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/tight_correct.jpg'>
</div>
<div class='col-md-4 bbox-example bg-danger'>
<b>Bad:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/tight_wrong1.jpg'>
</div>
<div class='col-md-4 bbox-example bg-danger'>
<b>Bad:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/tight_wrong2.jpg'>
</div>
</div>
</li>
<li>
Each box should only cover the <b>visible part</b> of all objects mentioned in the object.
<div class='row text-center'>
<div class='col-md-4 col-md-offset-2 bbox-example bg-success'>
<b>Good:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/vis_correct.jpg'>
</div>
<div class='col-md-4 bbox-example bg-danger'>
<b>Bad:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/vis_wrong.jpg'>
</div>
</div>
</li>
<li>
Objects that take up a large portion of the image should be <b>completey covered</b>
by their boxes, such as the boxes for the <b>road</b> below:
<div class='row text-center'>
<div class='col-md-4 col-md-offset-2 bbox-example bg-success'>
<b>Good:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/large-good.png'>
</div>
<div class='col-md-4 bbox-example bg-danger'>
<b>Bad:</b>
<br>
<img class='img-responsive' src='https://visualgenome.org/static/images/bounding_box_examples/large-bad.png'>
</div>
</div>
</li>
<li>
If the object we're asking for does not exist in the image, click <b>"No Box Exists"</b> and continue to the next one.
Click this button will remove the current box and disable box drawing. Click the button again to re-enable.
<br />
Every question should either have a bounding box or be marked as "No Box Exists".
</li>
<li>
If for whatever reason the box drawing cursor is not aligned with your mouse, click "Redraw box" to reset
the interface.
</li>
<li>
If no image loads, click <b>"No Box Exists"</b> and continue to the next question.
</li>
</ul>
</div>
<hr>
<div class="container" style="display: none;">
<div id="viz"></div>
</div>
<hr>
</div>
<div class="container">
<h3>YOUR TASK IS BELOW</h3>
</div>
<!-- <div class='container-fluid'>-->
<div class="container">
<div class="reference-container">
<div class="row">
<div class="col-xs-12 col-xs-offset-1">
<h3>[Reference Video]</h3>
<h3 id="gif-title"></h3>
</div>
</div>
<div class="row">
<div class="col-xs-12 text-center">
<div id="gif-container">
</div>
</div>
</div>
</div>
</div>
<div class="container">
<div class="workspace-container">
<div class='row'>
<div class='col-xs-10 col-xs-offset-1'>
<h3>[Your Workspace]</h3>
<h2 id='entity'></h2>
<h3 id='specific-action'></h3>
<h4>The object you draw around <b>MUST</b> correspond to the action described above!<br>If you don't see the object in this frame, or you aren't sure where it is, click <b>No Box Exists</b>.</h4>
</div>
</div>
<div class='row'>
<div class='col-xs-12 text-center'>
<div id='image-container'>
</div>
</div>
</div>
<div class='row'>
<div class='col-sx-12 text-center button-div'>
<button id='redraw' class='btn btn-lg btn-primary' disabled>Redraw Box</button>
<button id='skip' class='btn btn-lg btn-prmiary red' disabled>No Box Exists</button>
</div>
<div class='col-xs-12 text-center' id='button-div'>
<button id='prev-btn' tabindex="1" class='btn btn-lg btn-primary' disabled>Back</button>
<span id='counter'>
<span class='counter-top'></span> / <span class='counter-bottom'></span>
</span>
<button id='next-btn' tabindex="0" class='btn btn-lg btn-primary' disabled>Next</button>
</div>
</div>
</div>
</div>
<!-- </div>-->
<script type='text/json' id='input'>
</script>
<form id='results-form' method='post' action='dummy' class='text-center'>
<input type='hidden' value='' name='assignmentId' id='assignmentId'/>
<input type='hidden' value='' name='output' id='output'/>
<input type='submit' class='btn btn-lg btn-success' id='submit-btn' value='Submit' disabled/>
</form>
<script>
var amtbase = (function() {
// Copied from http://james.padolsey.com/javascript/bujs-1-getparameterbyname/
function getUrlParam(name) {
var match = RegExp('[?&]' + name + '=([^&]*)').exec(window.location.search);
return match ? decodeURIComponent(match[1].replace(/\+/g, ' ')) : null;
}
function getInput(default_input) {
if (typeof(default_input) === 'undefined') default_input = null;
try {
return JSON.parse($('#input').html());
} catch (e) {
return default_input;
}
}
function setOutput(output) {
$('#output').val(JSON.stringify(output));
}
function isPreview() {
return false;
var assignment_id = getUrlParam('assignmentId');
if (assignment_id === null) return false;
return assignment_id == 'ASSIGNMENT_ID_NOT_AVAILABLE';
}
function setupSubmit() {
var submit_to = getUrlParam('turkSubmitTo');
$('#results-form').attr('action', submit_to + '/mturk/externalSubmit');
$('#assignmentId').val(getUrlParam('assignmentId'));
}
return {
getInput: getInput,
setOutput: setOutput,
isPreview: isPreview,
setupSubmit: setupSubmit,
}
})();
</script>
<script>
$(function() {
var DEFAULT_INPUT = [
{'url': 'https://ai.stanford.edu/~jingweij/004QE.png', 'image_id': 1, 'action': 'Drinking from a cup/glass/bottle', 'entity': 'cup', 'gifurl': 'https://ai.stanford.edu/~jingweij/004QE.gif', 'gold_answerable': true, 'gt_box': {'x': 259, 'y': 27, 'w': 26, 'h': 34}},
{'url': 'https://ai.stanford.edu/~jingweij/001YG.png', 'image_id': 2, 'action': 'Taking a bag from somewhere', 'entity': 'bag', 'gifurl': 'https://ai.stanford.edu/~jingweij/001YG.gif'},
{'url': 'https://ai.stanford.edu/~jingweij/00T1E.png', 'image_id': 3, 'action': 'Closing a laptop', 'entity': 'laptop', 'gifurl': 'https://ai.stanford.edu/~jingweij/00T1E.gif'},
];
var input = amtbase.getInput(DEFAULT_INPUT);
var num_regions = input.length;
var descriptions = [];
var bb = null;
// Some variables to track state of the HIT.
var idx = 0;
var enabled = false;
function containsNonLatinCodepoints(s) {
return /[^\u0000-\u00ff]/.test(s);
}
function main() {
// If this is a HIT on AMT, then replace the default input with the real input.
// Enable the UI if the HIT is not in preview mode.
if (true || !amtbase.isPreview()) {
enable_hit();
}
// Set up empty description blobs
for(var k=0;k<num_regions;k++) {
let desc = input[k]
desc.answerable = true;
descriptions.push(desc);
};
render();
}
var isup = false;
$("#demoshow").click(function(){
if(!isup) {
var gifurl = "http://cs.stanford.edu/people/rak248/visualgenome/region_annotations_instructions.gif";
$("#demo").html('<img src="' + gifurl + '">');
isup = true;
} else {
$("#demo").html('');
isup = false;
}
});
function render_regions(image_url, regions) {
var div = $('#viz');
div.html('');
var graph = {'objects': [], 'unary_triples': [], 'binary_triples': []}
if (regions != null) {
for (var index in regions) {
graph.objects.push({'names': [regions[index].phrase],
'bbox': {'x': regions[index].x,
'y': regions[index].y,
'w': regions[index].w,
'h': regions[index].h
}
})
graph.unary_triples.push({'subject': index,
'predicate': '',
'object': '',
'attribute': '',
'text': [regions[index].phrase, '', '']})
}
}
//var div = $('<div>').appendTo($('#image-container'));
VG.renderSingleImage(div, graph, image_url, 700, {'VGViz': false});
}
// Use the current index to update the image and description
function render() {
// console.log(descriptions);
if (bb != null) {
bb.disable();
bb.remove();
}
// render_regions(input[idx]['url'], input[idx]['regions']);
$('#entity').html('');
$('#specific-action').html('');
$('#gif-title').html('');
$('#gif-container').html('');
$('#image-container').html('');
let entity = input[idx]['entity'];
$('#entity').html('Draw a box around: <span style="color: red;font-weight: bold">' + entity + '</span>');
$('#gif-title').html("<span>Specific Action: <span style='color: red; font-weight: bold'>" + input[idx]['action'] + "</span>");
$('#specific-action').html("<span>Specific Action: <span style='color: red; font-weight: bold'>" + input[idx]['action'] + "</span>");
let gifurl = input[idx]['gifurl'];
$('#gif-container').html('<img src="' + gifurl + '">');
bb = new VGG.BBoxDrawer($('#image-container'), input[idx]['url'], 700);
bb.enable();
if('rect' in descriptions[idx] && descriptions[idx].rect !== null) {
// render box in its place
// console.log(JSON.stringify(descriptions[idx].rect));
var drect = descriptions[idx].rect;
if(drect) {
//debugger;
bb.restoring();
bb.setBoxPosition(drect);
// bb.setStaticBox(drect); // TODO: uncomment this line for viewing results
}
} else {
// also put bounding box drawer into crosshair mode
bb.reset();
}
// Refresh the counter
$('.counter-top').text(idx + 1);
$('.counter-bottom').text(num_regions);
// If the UI is enabled, enable or disable the buttons depending on
// the index.
if (enabled) {
var prev_btn = $('#prev-btn');
var next_btn = $('#next-btn');
var redraw_btn = $('#redraw');
var skip_btn = $('#skip');
redraw_btn.prop('disabled', false);
skip_btn.prop('disabled', false);
prev_btn.prop('disabled', true);
next_btn.prop('disabled', true);
if (idx > 0) {
prev_btn.prop('disabled', false);
}
if (idx < num_regions - 1) next_btn.prop('disabled', false);
toggleSkipButton();
}
}
function mouseWasReleased() {
$("#text-area").focus()
}
function check_gold() {
if ('gold_answerable' in descriptions[idx]) {
if (descriptions[idx].gold_answerable && !bb.getBoxPosition()) {
return false;
} else if (descriptions[idx].gold_answerable && bb.getBoxPosition()) {
var gt_box = descriptions[idx].gt_box;
var iou = bb.computeIoU(gt_box.x, gt_box.y, gt_box.w, gt_box.h);
if (iou >= 0.7) {
return true;
} else {
return false;
}
}
return descriptions[idx].answerable === descriptions[idx].gold_answerable;
}
return true;
}
// Update the index, and save the text in the text area.
function set_idx(new_idx) {
if (new_idx < 0 || new_idx >= num_regions) return;
// console.log(descriptions[idx].rect, idx, num_regions);
console.log(bb.getCanvas());
if (!check_gold()) {
if (descriptions[idx].gold_answerable) {
alert("Uh-oh... This question should have a bounding box. \nYou may not have drawn a box, or the box you draw is not following the instruction above. \nPlease read the instruction carefully and draw again.");
} else {
alert("This item is not in the image, so there should be no bounding box. Click 'No Box Exists'");
}
return false;
}
console.log(bb.getCanvas());
console.log(bb.getBoxPosition());
// back up current data
storeCurrent();
// increment index
idx = new_idx;
render();
return true;
}
function storeCurrent() {
var d = descriptions[idx];
d.rect = bb.getBoxPosition();
}
function toggleSkipButton() {
var skip_btn = $('#skip');
if (descriptions[idx].answerable) {
skip_btn.text('No Box Exists')
skip_btn.addClass('red');
skip_btn.removeClass('green');
} else {
skip_btn.text('Box Exists')
skip_btn.addClass('green');
skip_btn.removeClass('red');
}
$('#redraw').prop('disabled', !descriptions[idx].answerable);
}
// Enable the UI.
function enable_hit() {
enabled = true;
// Enable components
$('#next-btn').click(function() {
set_idx(idx + 1);
});
$('#prev-btn').click(function() { set_idx(idx - 1) });
$('#redraw').click(function() {
if (bb != null) {
bb.disable();
bb.remove();
}
bb = new VGG.BBoxDrawer($('#image-container'), input[idx]['url'], 700);
bb.enable();
bb.reset();
});
$('#skip').click(function() {
descriptions[idx].answerable = !descriptions[idx].answerable;
if (!descriptions[idx].answerable) {
if (bb != null) {
bb.disable();
bb.remove();
}
bb = new VGG.BBoxDrawer($('#image-container'), input[idx]['url'], 700);
// bb.enable();
bb.reset();
} else {
bb.enable();
}
toggleSkipButton();
});
$('#text-area').prop('disabled', false);
$('#submit-btn').prop('disabled', false);
// Set up submit handler.
amtbase.setupSubmit();
$('#submit-btn').click(function() {
storeCurrent();
// console.log(JSON.stringify(descriptions));
// validate all descriptions
let wrongIdx = null;
if (_.any(descriptions, function(de, i) { wrongIdx = i+1; return !('rect' in de || !de.answerable)})) {
alert('Error: You must draw a bounding box for question ' + wrongIdx + ' (drag with mouse on the image) or image should be marked as not having a box"');
return false;
}
if (_.any(descriptions, function(de, i) { wrongIdx = i+1; return de.rect === null && de.answerable})) {
alert('Error: You must draw a bounding box for question ' + wrongIdx + ' (drag with mouse on the image) or image should be marked as not having a box"');
return false;
}
// otherwise we're good. HIT done!
amtbase.setOutput(descriptions);
});
}
// NOW FOLLOWS BOUNDING BOX CODE
var VGG = (function(vg, $) {
var DEFAULT_OPTIONS = {
static_box_color: '#f00',
bbox_color: '#ff0',
bbox_line_width: 2.0,
click_radius: 15,
handle_opacity: 0.2,
dot_small_radius: 5,
dot_big_radius: 10,
image_opacity: 1.0,
max_height: null,
max_width: null,
callback: function() {},
};
/*
var STATIC_BOX_COLOR = '#f00';
var BBOX_COLOR = '#00f';
var BBOX_LINE_WIDTH = 2.0;
var CLICK_RADIUS = 15;
var HANDLE_OPACITY = 0.2;
var OBJECT_SMALL_RADIUS = 5;
var OBJECT_BIG_RADIUS = 10;
*/
vg.merge_options = function(options, default_options) {
if (typeof(options) === 'undefined') {
options = {};
}
for (var opt in default_options) {
if (default_options.hasOwnProperty(opt)
&& !options.hasOwnProperty(opt)) {
options[opt] = default_options[opt];
}
}
return options;
}
var TEXT_FONT_SIZE = 20;
var TEXT_FONT = TEXT_FONT_SIZE + 'px sans-serif';
var TEXT_BOX_PADDING = 4;
vg.BBoxDrawer = function(div, image_url, canvas_width, options) {
var that = (this === vg ? {} : this);
options = vg.merge_options(options, DEFAULT_OPTIONS);
var scale = null;
var canvas = null;
var canvas_pos = null;
var ctx = null;
// Most recent positions of the mouse and of a click
var click_pos = null;
var mouse_pos = null;
// Whether the box has been been finalized after the initial drag
var bbox_drawn = false;
// Object with properties x, y, w, h
var bbox = null;
var static_box = null;
var object_pos = null;
var object_name = null;
var resize_direction = null;
var old_bbox = null;
var img_loaded = true;
var disabled = true;
var cursors = {
'UL': 'nw-resize',
'UR': 'ne-resize',
'BL': 'sw-resize',
'BR': 'se-resize',
'U': 'n-resize',
'R': 'e-resize',
'L': 'w-resize',
'B': 's-resize',
};
var img = new Image();
img.onload = setup;
img.onerror = function() {
img_loaded = false;
}
img.src = image_url;
that.getBoxPosition = function() {
if (bbox) {
// Convert to image coordinates
return {
'x': Math.floor(toImageCoords(bbox.x)),
'y': Math.floor(toImageCoords(bbox.y)),
'w': Math.floor(toImageCoords(bbox.w)),
'h': Math.floor(toImageCoords(bbox.h))
};
}
return null;
}
that.setBoxPosition = function(b) {
scale = choose_scale(img)
// copy it over
bbox = {};
bbox.x = Math.floor(toCanvasCoords(b.x));
bbox.y = Math.floor(toCanvasCoords(b.y));
bbox.w = Math.floor(toCanvasCoords(b.w));
bbox.h = Math.floor(toCanvasCoords(b.h));
draw();
}
that.enable = function() {
disabled = false;
draw();
}
that.disable = function() {
disabled = true;
mouseup();
draw();
}
that.setObject = function(x, y, name) {
if (scale) {
object_pos = {'x': toCanvasCoords(x), 'y': toCanvasCoords(y)};
} else {
object_pos = {'x': x, 'y': y};
}
object_name = name;
}
that.setStaticBox = function(box) {
static_box = $.extend({}, box);
if (scale) {
static_box.x = toCanvasCoords(box.x);
static_box.y = toCanvasCoords(box.y);
static_box.w = toCanvasCoords(box.w);
static_box.h = toCanvasCoords(box.h);
}
draw();
}
that.computeIoU = function(x, y, w, h) {
if (bbox) {
var pos = that.getBoxPosition();
var ax1 = pos.x;
var ax2 = pos.x + pos.w;
var ay1 = pos.y;
var ay2 = pos.y + pos.h;
var bx1 = x;
var bx2 = x + w;
var by1 = y;
var by2 = y + h;
var xx1 = Math.max(ax1, bx1);
var xx2 = Math.min(ax2, bx2);
var ww = Math.max(xx2 - xx1, 0);
var yy1 = Math.max(ay1, by1);
var yy2 = Math.min(ay2, by2);
var hh = Math.max(yy2 - yy1, 0);
var intersection = ww * hh;
var union = pos.w * pos.h + w * h - intersection;
console.log(ax1, ax2, ay1, ay2, bx1, bx2, by1, by2);
console.log('inter_w', ww);
console.log('inter_h', hh);
console.log('inter', intersection);
console.log('union', union);
return intersection * 1. / union;
}
return null;
}
function choose_scale(img) {
if (_.isNumber(options.max_width) && _.isNumber(options.max_height)) {
var scale_h = img.width / options.max_width;
var scale_v = img.height / options.max_height;
return Math.max(scale_h, scale_v);
} else {
return img.width / canvas_width;
}
}
that.restoring = function() {
bbox_drawn = true;
}
that.reset = function() {
click_pos = null;
mouse_pos = null;
bbox_drawn = false;
bbox = null;
static_box = null;
var object_pos = null;
var object_name = null;
var resize_direction = null;
var old_bbox = null;
$("#drawcanv").css({'cursor': 'crosshair'}); // reset cursor
draw();
}
function setup() {
// scale = img.width / canvas_width;
scale = choose_scale(img);
canvas_width = img.width / scale;
var canvas_height = img.height / scale;
canvas = $('<canvas>')
.attr({'width': canvas_width,
'height': canvas_height})
.attr('id', 'drawcanv')
.css({'cursor': 'crosshair'})
.appendTo(div);
canvas_pos = {'x': canvas.offset().left, 'y': canvas.offset().top};
ctx = canvas[0].getContext('2d');
canvas.mousemove(mousemove);
canvas.mousedown(mousedown);
canvas.mouseup(mouseup);
canvas.mouseout(mouseup);
if (object_pos) {
object_pos.x = toCanvasCoords(object_pos.x);
object_pos.y = toCanvasCoords(object_pos.y);
}
// Convert the static box from image coordinates to canvas coordinates
if (static_box) {
var props = ['x', 'y', 'w', 'h'];
for (var i = 0; i < props.length; i++) {
static_box[props[i]] = toCanvasCoords(static_box[props[i]]);
}
}
draw();
options.callback();
}
function toCanvasCoords(x) { return x / scale; }
function toImageCoords(x) { return x * scale; }
function setCursor(cursor) { canvas.css('cursor', cursor); }
function getPosition(e) {
var x = e.pageX - canvas_pos.x;
var y = e.pageY - canvas_pos.y;
return {'x': x, 'y': y};
}
function mousedown(e) {
if (disabled) return;
click_pos = getPosition(e);
if (bbox) {
resize_direction = detectCollision(click_pos.x, click_pos.y, bbox);
if (resize_direction) {
old_bbox = $.extend({}, bbox);
}
}
}
function mouseup(e) {
click_pos = null;
resize_direction = null;
if (bbox) {
bbox_drawn = true;
setCursor('pointer');
}
mouseWasReleased();
draw();
}
function mousemove(e) {
mouse_pos = getPosition(e);
updateBBox();
if (bbox && !click_pos && !disabled) {
var collision = detectCollision(mouse_pos.x, mouse_pos.y, bbox);
if (cursors.hasOwnProperty(collision)) {
setCursor(cursors[collision]);
} else {
setCursor('pointer');
}
}
draw();
}
function detectCollision(x, y, box) {
function dist(x1, y1, x2, y2) {
var dx = x2 - x1;
var dy = y2 - y1;
return Math.sqrt(dx * dx + dy * dy);
}
if (dist(x, y, box.x, box.y) < options.click_radius) {
return 'UL';
} else if (dist(x, y, box.x + box.w, box.y) < options.click_radius) {
return 'UR';
} else if (dist(x, y, box.x, box.y + box.h) < options.click_radius) {
return 'BL';
} else if (dist(x, y, box.x + box.w, box.y + box.h)
< options.click_radius) {
return 'BR';
} else if (Math.abs(box.x - x) < options.click_radius) {
return 'L';
} else if (Math.abs(box.x + box.w - x) < options.click_radius) {
return 'R';
} else if (Math.abs(box.y - y) < options.click_radius
&& x >= bbox.x && x <= bbox.x + bbox.w) {
return 'U';
} else if (Math.abs(box.y + box.h - y) < options.click_radius
&& y >= bbox.y && y <= bbox.y + bbox.h) {
return 'B';
}
return null;
}
function updateBBox() {
function makeBBox(x1, y1, x2, y2) {
var x = Math.min(x1, x2);
var y = Math.min(y1, y2);
var w = Math.max(x1, x2) - x;
var h = Math.max(y1, y2) - y;
return {'x': x, 'y': y, 'w': w, 'h': h};
}
if (!bbox_drawn && click_pos && mouse_pos) {
bbox = makeBBox(click_pos.x, click_pos.y, mouse_pos.x, mouse_pos.y);
} else if (bbox_drawn && click_pos && mouse_pos && resize_direction) {
var x1 = old_bbox.x;
var x2 = old_bbox.x + old_bbox.w;
var y1 = old_bbox.y;
var y2 = old_bbox.y + old_bbox.h;
if (resize_direction === 'L'
|| resize_direction === 'UL'
|| resize_direction === 'BL') {
x1 = mouse_pos.x;
}
if (resize_direction === 'R'
|| resize_direction === 'UR'
|| resize_direction === 'BR') {
x2 = mouse_pos.x;
}
if (resize_direction === 'U'
|| resize_direction === 'UR'
|| resize_direction === 'UL') {
y1 = mouse_pos.y;
}
if (resize_direction === 'B'
|| resize_direction === 'BR'
|| resize_direction === 'BL') {
y2 = mouse_pos.y;
}
bbox = makeBBox(x1, y1, x2, y2);
}
}
function drawBox(box, box_color) {
ctx.save();
function r(x) { return Math.floor(x); }
ctx.strokeStyle = box_color;
ctx.lineWidth = options.bbox_line_width;
ctx.strokeRect(r(box.x), r(box.y), r(box.w), r(box.h));
ctx.restore();
}
function drawCrosshair(x, y) {
y = Math.floor(y) + 0.5;
x = Math.floor(x) + 0.5;
ctx.save();
ctx.lineWidth = 3;
ctx.strokeStyle = '#fff';
ctx.globalAlpha = 0.3;
ctx.beginPath();
ctx.moveTo(x, 0);
ctx.lineTo(x, canvas.height());
ctx.stroke();
ctx.beginPath();
ctx.moveTo(0, y);
ctx.lineTo(canvas.width(), y);
ctx.stroke();
ctx.lineWidth = 1;
ctx.strokeStyle = '#000';
ctx.globalAlpha = 1.0;
ctx.beginPath();
ctx.moveTo(x, 0);
ctx.lineTo(x, canvas.height());
ctx.stroke();
ctx.beginPath();
ctx.moveTo(0, y);
ctx.lineTo(canvas.width(), y);
ctx.stroke();
ctx.restore();
}
function drawHandle(x, y) {
ctx.save();
ctx.globalAlpha = options.handle_opacity;
ctx.beginPath();
ctx.arc(x, y, options.click_radius, 0, 2 * Math.PI);
ctx.closePath();
ctx.fill();
ctx.restore();
}
function drawObject(x, y, name, emphasized) {
ctx.save();
ctx.fillStyle = options.bbox_color;
var r = emphasized ? options.dot_big_radius : options.dot_small_radius;
ctx.beginPath();
ctx.arc(x, y, r, 0, 2 * Math.PI);
ctx.closePath();
ctx.fill();
ctx.stroke();
if (emphasized) {
// Draw the text box
var width = ctx.measureText(name).width;
ctx.fillStyle = '#fff';
ctx.strokeStyle = '#000';
ctx.beginPath();
var x1 = x - width - TEXT_BOX_PADDING;
var x2 = x + width + TEXT_BOX_PADDING;
var y1 = y + options.dot_big_radius + 1.5 * TEXT_BOX_PADDING;
var y2 = y1 + 1.5 * TEXT_BOX_PADDING + TEXT_FONT_SIZE;
ctx.moveTo(x1, y1);
ctx.lineTo(x1, y2);
ctx.lineTo(x2, y2);
ctx.lineTo(x2, y1);
ctx.closePath();
ctx.fill();
ctx.stroke();
ctx.font = TEXT_FONT;
ctx.fillStyle = '#000';
var tx = x - width;
var ty = y + TEXT_FONT_SIZE + 2.5 * TEXT_BOX_PADDING + options.dot_big_radius;
ctx.fillText(name, tx, ty);
}
ctx.restore();
}
function draw() {
if (!ctx) return;