def hessian_matrix_det(image, sigma=1):
 image = img_as_float(image)
 image = integral_image(image)
 return np.array(_hessian_matrix_det(image, sigma))

def hessian_matrix_det ( image , sigma = 1 ) : image = img_as_float ( image ) image = integral_image ( image ) return np . array ( _hessian_matrix_det ( image , sigma ) )
computes the approximate hessian determinant over an image .