void findAllContours() {
outerContours = new ArrayList<Contour>(50);
innerContours = new ArrayList<Contour>(50);
int label = 0; // current label
// scan top to bottom, left to right
for (int v = 1; v < pixelArray.length - 1; v++) {
label = 0; // no label
for (int u = 1; u < pixelArray[v].length - 1; u++) {
if (pixelArray[v][u] == FOREGROUND) {
if (label != 0) { // keep using same label
labelArray[v][u] = label;
} else {
label = labelArray[v][u];
if (label == 0) { // unlabeled - new outer contour
regionId = regionId + 1;
label = regionId;
Contour oc = traceOuterContour(u, v, label);
outerContours.add(oc);
labelArray[v][u] = label;
}
}
} else { // BACKGROUND pixel
if (label != 0) {
if (labelArray[v][u] == 0) { // unlabeled - new inner contour
Contour ic = traceInnerContour(u - 1, v, label);
innerContours.add(ic);
}
label = 0;
}
}
}
}
// shift back to original coordinates
Contour.moveContoursBy(outerContours, -1, -1);
Contour.moveContoursBy(innerContours, -1, -1);
}
