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aceb1b2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 | /**
* Segmentation Tool Manager
*
* Provides flood fill and eraser tools for the image annotation canvas.
* Extends the ImageAnnotationManager with segmentation capabilities.
*
* Segmentation masks are stored alongside other annotations as:
* {type: "mask", label: "road", rle: {counts: [...], size: [h, w]}}
*
* The mask overlay is rendered on a separate canvas layer above the
* annotation canvas, with semi-transparent colored regions.
*/
(function() {
'use strict';
class SegmentationToolManager {
/**
* @param {HTMLCanvasElement} canvas - The main annotation canvas
* @param {number} width - Canvas width
* @param {number} height - Canvas height
*/
constructor(canvas, width, height) {
this.canvas = canvas;
this.width = width;
this.height = height;
// Create mask overlay canvas
this.maskCanvas = document.createElement('canvas');
this.maskCanvas.width = width;
this.maskCanvas.height = height;
this.maskCanvas.style.cssText = 'position:absolute;top:0;left:0;pointer-events:none;opacity:0.4;';
this.maskCtx = this.maskCanvas.getContext('2d');
// Working canvas for flood fill operations
this.workCanvas = document.createElement('canvas');
this.workCanvas.width = width;
this.workCanvas.height = height;
this.workCtx = this.workCanvas.getContext('2d');
// Mask data: label -> ImageData (binary mask)
this.masks = {};
this.activeTool = null;
this.activeLabel = null;
this.eraserSize = 20;
this.fillTolerance = 32;
// Insert mask canvas after the main canvas
if (canvas.parentElement) {
canvas.parentElement.style.position = 'relative';
canvas.parentElement.insertBefore(this.maskCanvas, canvas.nextSibling);
}
}
setTool(tool) {
this.activeTool = tool;
}
setLabel(label, color) {
this.activeLabel = label;
this.activeColor = color || '#FF0000';
}
setEraserSize(size) {
this.eraserSize = size;
}
setFillTolerance(tolerance) {
this.fillTolerance = tolerance;
}
/**
* Handle click on canvas for flood fill.
*/
floodFill(x, y) {
if (!this.activeLabel) return null;
x = Math.round(x);
y = Math.round(y);
if (x < 0 || x >= this.width || y < 0 || y >= this.height) return null;
// Get the source image data from the main canvas
var ctx = this.canvas.getContext('2d');
var imageData = ctx.getImageData(0, 0, this.width, this.height);
var pixels = imageData.data;
// Target color at click point
var idx = (y * this.width + x) * 4;
var targetR = pixels[idx];
var targetG = pixels[idx + 1];
var targetB = pixels[idx + 2];
// Create or get mask for this label
if (!this.masks[this.activeLabel]) {
this.masks[this.activeLabel] = new Uint8Array(this.width * this.height);
}
var mask = this.masks[this.activeLabel];
// Scanline flood fill
var tolerance = this.fillTolerance;
var visited = new Uint8Array(this.width * this.height);
var stack = [[x, y]];
var filled = 0;
while (stack.length > 0) {
var point = stack.pop();
var px = point[0];
var py = point[1];
if (px < 0 || px >= this.width || py < 0 || py >= this.height) continue;
var pidx = py * this.width + px;
if (visited[pidx]) continue;
visited[pidx] = 1;
var ci = pidx * 4;
var dr = Math.abs(pixels[ci] - targetR);
var dg = Math.abs(pixels[ci + 1] - targetG);
var db = Math.abs(pixels[ci + 2] - targetB);
if (dr <= tolerance && dg <= tolerance && db <= tolerance) {
mask[pidx] = 1;
filled++;
stack.push([px + 1, py]);
stack.push([px - 1, py]);
stack.push([px, py + 1]);
stack.push([px, py - 1]);
}
}
this.renderMasks();
return {
type: 'mask',
label: this.activeLabel,
rle: this.encodeRLE(mask, this.width, this.height),
pixelsFilled: filled
};
}
/**
* Erase mask pixels at the given canvas coordinates.
*/
erase(x, y) {
x = Math.round(x);
y = Math.round(y);
var r = Math.round(this.eraserSize / 2);
var changed = false;
// Erase from all masks
for (var label in this.masks) {
var mask = this.masks[label];
for (var dy = -r; dy <= r; dy++) {
for (var dx = -r; dx <= r; dx++) {
if (dx * dx + dy * dy <= r * r) {
var px = x + dx;
var py = y + dy;
if (px >= 0 && px < this.width && py >= 0 && py < this.height) {
var idx = py * this.width + px;
if (mask[idx]) {
mask[idx] = 0;
changed = true;
}
}
}
}
}
}
if (changed) {
this.renderMasks();
}
return changed;
}
/**
* Render all mask overlays.
*/
renderMasks() {
this.maskCtx.clearRect(0, 0, this.width, this.height);
var imageData = this.maskCtx.createImageData(this.width, this.height);
var data = imageData.data;
for (var label in this.masks) {
var mask = this.masks[label];
var color = this._parseColor(this._getLabelColor(label));
for (var i = 0; i < mask.length; i++) {
if (mask[i]) {
var pi = i * 4;
// Alpha-blend with existing pixel data
data[pi] = Math.min(255, data[pi] + color.r);
data[pi + 1] = Math.min(255, data[pi + 1] + color.g);
data[pi + 2] = Math.min(255, data[pi + 2] + color.b);
data[pi + 3] = 200; // Semi-transparent
}
}
}
this.maskCtx.putImageData(imageData, 0, 0);
}
/**
* Encode a binary mask to RLE format.
*/
encodeRLE(mask, width, height) {
var counts = [];
var currentVal = 0;
var currentCount = 0;
for (var i = 0; i < mask.length; i++) {
var val = mask[i] ? 1 : 0;
if (val === currentVal) {
currentCount++;
} else {
counts.push(currentCount);
currentVal = val;
currentCount = 1;
}
}
counts.push(currentCount);
return { counts: counts, size: [height, width] };
}
/**
* Decode RLE format back to a binary mask.
*/
decodeRLE(rle) {
var size = rle.size;
var counts = rle.counts;
var mask = new Uint8Array(size[0] * size[1]);
var pos = 0;
var val = 0;
for (var i = 0; i < counts.length; i++) {
for (var j = 0; j < counts[i]; j++) {
if (pos < mask.length) {
mask[pos] = val;
pos++;
}
}
val = 1 - val;
}
return mask;
}
/**
* Load mask data from saved annotations.
*/
loadMask(label, rle) {
this.masks[label] = this.decodeRLE(rle);
this.renderMasks();
}
/**
* Get all mask annotations for saving.
*/
getMaskAnnotations() {
var annotations = [];
for (var label in this.masks) {
var mask = this.masks[label];
// Check if mask has any filled pixels
var hasPixels = false;
for (var i = 0; i < mask.length; i++) {
if (mask[i]) { hasPixels = true; break; }
}
if (hasPixels) {
annotations.push({
type: 'mask',
label: label,
rle: this.encodeRLE(mask, this.width, this.height)
});
}
}
return annotations;
}
/**
* Clear all masks.
*/
clearAll() {
this.masks = {};
this.maskCtx.clearRect(0, 0, this.width, this.height);
}
/**
* Clear mask for a specific label.
*/
clearLabel(label) {
delete this.masks[label];
this.renderMasks();
}
_getLabelColor(label) {
// Try to get color from label buttons on the page
var btn = document.querySelector('.label-btn[data-label="' + label + '"]');
if (btn) return btn.dataset.color || '#FF0000';
return this.activeColor || '#FF0000';
}
_parseColor(hex) {
hex = hex.replace('#', '');
if (hex.length === 3) {
hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
}
return {
r: parseInt(hex.substring(0, 2), 16),
g: parseInt(hex.substring(2, 4), 16),
b: parseInt(hex.substring(4, 6), 16)
};
}
}
// Expose globally
window.SegmentationToolManager = SegmentationToolManager;
})();
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