Errors: image.py: FEAT: Adding canny edge detector

[John Garramone]

I don't know if the canny edge detector is fully implemented yet, but when trying to use it I get some errors:

def canny(image,
 +          low_threshold, high_threshold = None,
 +          treshold_type = CANNY_THRESHOLD.MANUAL,
 +          sobel_window = 3, is_fast = False):

I believe treshold_type should be threshold_type

Once that is corrected I get an error of:

"...arrayfire\image.py", line 1235, in canny
c_uint(sobel_window), c_bool(is_fast)))

NameError: global name 'c_uint' is not defined

If assuming that c_unit and c_bool are supposed to be appended with the _t to make it look like this:

safe_call(backend.get().af_canny(c_pointer(output.arr), threshold_type.value,
                                     low_threshold, high_threshold and high_threshold.value or 0,
                                     c_uint_t(sobel_window), c_bool_t(is_fast)))

and using the default sobel_window=3 I get the following error.

"...\arrayfire\image.py", line 1235, in canny
c_uint_t(sobel_window), c_bool_t(is_fast)))

ArgumentError: argument 3: <type 'exceptions.TypeError'>: Don't know how to convert parameter 3

Hope this makes sense and thanks for adding this feature

[Pavan Yalamanchili]

Thanks for reporting this. This should now be fixed in both master and devel.