'str' object is not callable

[jerryliu3]

After creating a morphable model and an MMFitter and a LucasKanadeMMFitter, I want to call the _fit() or fit_from_shape() method on an image. The image has landmarks in a .pts file. I am getting an error that 'str' object is not callable, with the trace leading to inside the _prepare_image function on the line: feature_image = self.holistic_features(tmp_image). Would you have any explanation for this?

From what I know, this is an issue where it expected a different type (such as an Image class) but it got a string type instead. I also came across this error when initializing the LucasKanadeMMFitter and specifying lk_algorithm_cls = 'SimultaneousForwardAdditive' instead of leaving it as the default (SimultaneousForwardAdditive) which is of Type type instead of Type string.

I am not sure if this is the reason, but it says in the comments that _prepare_image expects a menpo.image.Image or subclass and a menpo.shape.PointCloud but for some reason when I import the images using menpo.io.import_image() and image.landmarks['PTS'] they give me objects of type menpo.image.base.Image and menpo.shape.pointcloud.PointCloud.

Any help would be greatly appreciated!

Jerry