cv2.SimpleBlobDetector().detect(…)
coredumps trying to dereference address zero.
Peace
--Devon
P.S. Any cure for the annoying echo of every input line?
$ lldb python3
lldb python3
(lldb) target create "python3"
Current executable set to 'python3' (x86_64).
(lldb) run
run
Process 34431 launched: '/Library/Frameworks/Python.framework/Versions/3.7/bin/python3' (x86_64)
Process 34431 stopped
* thread #2, stop reason = exec
frame #0: 0x0000000100004000 dyld`_dyld_start
dyld`_dyld_start:
-> 0x100004000 <+0>: popq %rdi
0x100004001 <+1>: pushq $0x0
0x100004003 <+3>: movq %rsp, %rbp
0x100004006 <+6>: andq $-0x10, %rsp
Target 0: (Python) stopped.
(lldb) continue
continue
Process 34431 resuming
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 16:52:21)
[Clang 6.0 (clang-600.0.57)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
import cv2
print(cv2.__version__)
im = cv2.imread("/tmp/portrait.jpg", cv2.IMREAD_GRAYSCALE)
print(im)
print(cv2.SimpleBlobDetector().detect(im))
>>> import cv2
>>> print(cv2.__version__)
4.5.1
>>> im = cv2.imread("/tmp/portrait.jpg", cv2.IMREAD_GRAYSCALE)
>>> print(im)
[[ 23 23 23 ... 13 13 13]
[ 23 23 23 ... 13 13 13]
[ 23 23 23 ... 13 13 13]
...
[254 254 254 ... 144 145 145]
[254 254 254 ... 147 146 146]
[254 254 254 ... 150 148 148]]
>>> print(cv2.SimpleBlobDetector().detect(im))
Process 34431 stopped
* thread #2, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
frame #0: 0x0000000102cf1432 cv2.cpython-37m-darwin.so`pyopencv_cv_Feature2D_detect(_object*, _object*, _object*) + 386
cv2.cpython-37m-darwin.so`pyopencv_cv_Feature2D_detect:
-> 0x102cf1432 <+386>: movq (%rdi), %rax
0x102cf1435 <+389>: movq 0x40(%rax), %rax
0x102cf1439 <+393>: movq $0x0, -0xb0(%rbp)
0x102cf1444 <+404>: movl $0x1010000, -0xc0(%rbp) ; imm = 0x1010000
Target 0: (Python) stopped.
(lldb) bt all
bt all
* thread #2, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
* frame #0: 0x0000000102cf1432 cv2.cpython-37m-darwin.so`pyopencv_cv_Feature2D_detect(_object*, _object*, _object*) + 386
frame #1: 0x00000001000f05ed Python`_PyMethodDef_RawFastCallKeywords + 685
frame #2: 0x00000001000f6152 Python`_PyMethodDescr_FastCallKeywords + 82
frame #3: 0x00000001001ae5dc Python`call_function + 780
frame #4: 0x00000001001ab55c Python`_PyEval_EvalFrameDefault + 25164
frame #5: 0x00000001001af0d6 Python`_PyEval_EvalCodeWithName + 2422
frame #6: 0x00000001001a5234 Python`PyEval_EvalCode + 100
frame #7: 0x00000001001e24e7 Python`PyRun_InteractiveOneObjectEx + 599
frame #8: 0x00000001001e1d52 Python`PyRun_InteractiveLoopFlags + 226
frame #9: 0x00000001001e1c3c Python`PyRun_AnyFileExFlags + 60
frame #10: 0x0000000100201ac6 Python`pymain_main + 7110
frame #11: 0x0000000100201f2a Python`_Py_UnixMain + 58
frame #12: 0x00007fff685773d5 libdyld.dylib`start + 1
thread #3
frame #0: 0x00007fff686ac322 libsystem_kernel.dylib`swtch_pri + 10
frame #1: 0x00007fff6876de90 libsystem_pthread.dylib`sched_yield + 11
frame #2: 0x00000001099eb1bb libopenblas.0.dylib`blas_thread_server + 123
frame #3: 0x00007fff6876b2eb libsystem_pthread.dylib`_pthread_body + 126
frame #4: 0x00007fff6876e249 libsystem_pthread.dylib`_pthread_start + 66
frame #5: 0x00007fff6876a40d libsystem_pthread.dylib`thread_start + 13
(lldb)