opencv image encodeing returns array, instead of buffer
I am having a problem with converting encoded image to string. I encode as below:
image = cv2.imread(imagePath)
_, buffer = cv2.imencode('.png', image)
When I try to call, buffer.toString(), I get the following error:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
There are many questions on stackoverflow related to the same functionality that I am doing(Encoding with opencv). The following are few, which has contradicting answers.
- https://stackoverflow.com/a/25592959/7621143
In this answer, it is implied that imencode returns a tuple, with 2 elements:
>>> img_str = cv2.imencode('.jpg', img)[1].tostring()
>>> type(img_str)
'str'
- https://stackoverflow.com/a/17970817/7621143
Another answer to the same question, implies that the result is one value.
Anyway, in my case, the return value is a tuple with 2 elements, where the 2nd one is an ndarray, which doesn't have toString() method.
FWIW,
$ pip show opencv-python
Name: opencv-python
Version: 3.4.3.18
$ pip show numpy
Name: numpy
Version: 1.15.4
OpenCV documentation for imencode says, the return value is a tuple with 2 elements & the 2nd one is buffer.
Python: cv2.imencode(ext, img[, params]) → retval, buf
Any suggestions are appreciative, to resolve this issue.
python numpy opencv
edited Nov 23 '18 at 7:05
petezurich
3,50581734
asked Nov 23 '18 at 6:34
explorer
498411
add a comment |
I am having a problem with converting encoded image to string. I encode as below:
image = cv2.imread(imagePath)
_, buffer = cv2.imencode('.png', image)
When I try to call, buffer.toString(), I get the following error:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
There are many questions on stackoverflow related to the same functionality that I am doing(Encoding with opencv). The following are few, which has contradicting answers.
- https://stackoverflow.com/a/25592959/7621143
In this answer, it is implied that imencode returns a tuple, with 2 elements:
>>> img_str = cv2.imencode('.jpg', img)[1].tostring()
>>> type(img_str)
'str'
- https://stackoverflow.com/a/17970817/7621143
Another answer to the same question, implies that the result is one value.
Anyway, in my case, the return value is a tuple with 2 elements, where the 2nd one is an ndarray, which doesn't have toString() method.
FWIW,
$ pip show opencv-python
Name: opencv-python
Version: 3.4.3.18
$ pip show numpy
Name: numpy
Version: 1.15.4
OpenCV documentation for imencode says, the return value is a tuple with 2 elements & the 2nd one is buffer.
Python: cv2.imencode(ext, img[, params]) → retval, buf
Any suggestions are appreciative, to resolve this issue.
python numpy opencv
edited Nov 23 '18 at 7:05
petezurich
3,50581734
asked Nov 23 '18 at 6:34
explorer
498411
add a comment |
I am having a problem with converting encoded image to string. I encode as below:
image = cv2.imread(imagePath)
_, buffer = cv2.imencode('.png', image)
When I try to call, buffer.toString(), I get the following error:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
There are many questions on stackoverflow related to the same functionality that I am doing(Encoding with opencv). The following are few, which has contradicting answers.
- https://stackoverflow.com/a/25592959/7621143
In this answer, it is implied that imencode returns a tuple, with 2 elements:
>>> img_str = cv2.imencode('.jpg', img)[1].tostring()
>>> type(img_str)
'str'
- https://stackoverflow.com/a/17970817/7621143
Another answer to the same question, implies that the result is one value.
Anyway, in my case, the return value is a tuple with 2 elements, where the 2nd one is an ndarray, which doesn't have toString() method.
FWIW,
$ pip show opencv-python
Name: opencv-python
Version: 3.4.3.18
$ pip show numpy
Name: numpy
Version: 1.15.4
OpenCV documentation for imencode says, the return value is a tuple with 2 elements & the 2nd one is buffer.
Python: cv2.imencode(ext, img[, params]) → retval, buf
Any suggestions are appreciative, to resolve this issue.
python numpy opencv
edited Nov 23 '18 at 7:05
petezurich
3,50581734
asked Nov 23 '18 at 6:34
explorer
498411
I am having a problem with converting encoded image to string. I encode as below:
image = cv2.imread(imagePath)
_, buffer = cv2.imencode('.png', image)
When I try to call, buffer.toString(), I get the following error:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
There are many questions on stackoverflow related to the same functionality that I am doing(Encoding with opencv). The following are few, which has contradicting answers.
- https://stackoverflow.com/a/25592959/7621143
In this answer, it is implied that imencode returns a tuple, with 2 elements:
>>> img_str = cv2.imencode('.jpg', img)[1].tostring()
>>> type(img_str)
'str'
- https://stackoverflow.com/a/17970817/7621143
Another answer to the same question, implies that the result is one value.
Anyway, in my case, the return value is a tuple with 2 elements, where the 2nd one is an ndarray, which doesn't have toString() method.
FWIW,
$ pip show opencv-python
Name: opencv-python
Version: 3.4.3.18
$ pip show numpy
Name: numpy
Version: 1.15.4
OpenCV documentation for imencode says, the return value is a tuple with 2 elements & the 2nd one is buffer.
Python: cv2.imencode(ext, img[, params]) → retval, buf
Any suggestions are appreciative, to resolve this issue.
python numpy opencv
python numpy opencv
edited Nov 23 '18 at 7:05
petezurich
3,50581734
asked Nov 23 '18 at 6:34
explorer
498411
edited Nov 23 '18 at 7:05
petezurich
3,50581734
asked Nov 23 '18 at 6:34
explorer
498411
edited Nov 23 '18 at 7:05
petezurich
3,50581734
edited Nov 23 '18 at 7:05
petezurich
3,50581734
edited Nov 23 '18 at 7:05
petezurich
3,50581734
3,50581734
asked Nov 23 '18 at 6:34
explorer
498411
asked Nov 23 '18 at 6:34
explorer
498411
asked Nov 23 '18 at 6:34
explorer
498411
498411
add a comment |
add a comment |
1 Answer
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votes
The error clearly says:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
which means that you have mis-spelled the method. Replace toString with tostring to get the desired results.
answered Nov 23 '18 at 6:52
ZdaR
13k33453
add a comment |
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1 Answer
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1 Answer
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The error clearly says:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
which means that you have mis-spelled the method. Replace toString with tostring to get the desired results.
answered Nov 23 '18 at 6:52
ZdaR
13k33453
add a comment |
The error clearly says:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
which means that you have mis-spelled the method. Replace toString with tostring to get the desired results.
answered Nov 23 '18 at 6:52
ZdaR
13k33453
add a comment |
The error clearly says:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
which means that you have mis-spelled the method. Replace toString with tostring to get the desired results.
answered Nov 23 '18 at 6:52
ZdaR
13k33453
The error clearly says:
AttributeError: 'numpy.ndarray' object has no attribute 'toString'
which means that you have mis-spelled the method. Replace toString with tostring to get the desired results.
answered Nov 23 '18 at 6:52
ZdaR
13k33453
answered Nov 23 '18 at 6:52
ZdaR
13k33453
answered Nov 23 '18 at 6:52
ZdaR
13k33453
answered Nov 23 '18 at 6:52
ZdaR
13k33453
13k33453
add a comment |
add a comment |
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