Load image on canvas
function loadImage(image) {
				$scope.$applyAsync(function () {
					if ($scope.reversed) $scope.flipContext();
					$scope.signatureReady = true;

					ctxBackground.clearRect(0, 0, canvas.width, canvas.height);
					ctxBackground.drawImage(image, 0, 0, canvasBackground.width, canvasBackground.height);
				});
			}