I'm using a javascript based opencv (See: https://github.com/mtschirs/js-objectdetect) and it works perfectly with live video using canvas and html5.
When I try to detect using a dynamically saved image it fails, but works if I hard code an image.
The following (static image):
<img id="image" src="download.png"></img>
works fine, but using
var dataURL = $("#canvas")[0].toDataURL("image/png");
$("#image").attr('src', dataURL);
or using an ajax call which saves the image onto the server and returns the url path
$.ajax({
type: "POST",
url: "saveImage.php",
data: {
img: dataURL
}
}).done(function(o) {
$("#image").attr('src', o);
});
both fail. They both display an appropriate image.
the detection function is
$("#image").objectdetect(..., function(faces) { ... }
Executes, but returns array length 0 unless I use the static image