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heHey guys,

So I'm creating a Mat from camera buffers that I'm receiving like so:

cv::Mat src = cv::Mat(cv::Size(img_height, img_width),CV_8UC4);
memcpy(src.ptr(), (void*) img_buffer,img_height * img_width * 4);

This works fine.

But when I try to do any operation on this, I get weird output.

For example,

cv::blur(src,src,Size(5,5));

results in the expected output (blurred) but divided into 5 "columns".

Similarly, if I try

cv::blur(src,src,Size(3,3));

I get 3 such columns.

Same with other operations - Gaussian blur, erode etc

Only other operation I have tested that works fine without a problem is clone().

Can anyone hazard a guess as to why this might be happening?

I'm working on a device which does not have a proper port of OpenCV so all OS related tasks(reading and writing images) are being done by hand.

heHey Hey guys,

So I'm creating a Mat from camera buffers that I'm receiving like so:

cv::Mat src = cv::Mat(cv::Size(img_height, img_width),CV_8UC4);
memcpy(src.ptr(), (void*) img_buffer,img_height * img_width * 4);

This works fine.

But when I try to do any operation on this, I get weird output.

For example,

cv::blur(src,src,Size(5,5));

results in the expected output (blurred) but divided into 5 "columns".

Similarly, if I try

cv::blur(src,src,Size(3,3));

I get 3 such columns.

Same with other operations - Gaussian blur, erode etc

Only other operation I have tested that works fine without a problem is clone().

Can anyone hazard a guess as to why this might be happening?

I'm working on a device which does not have a proper port of OpenCV so all OS related tasks(reading and writing images) are being done by hand.

cv::medianBlur(inter,dest,3);

cv::cvtColor(inter, dest, COLOR_RGBA2RGB);

cv::blur(src,dest,Size(5,5));

Hey guys,

So I'm creating a Mat from camera buffers that I'm receiving like so:

cv::Mat src = cv::Mat(cv::Size(img_height, img_width),CV_8UC4);
memcpy(src.ptr(), (void*) img_buffer,img_height * img_width * 4);

This works fine.

But when I try to do any operation on this, I get weird output.

For example,

cv::blur(src,src,Size(5,5));

results in the expected output (blurred) but divided into 5 "columns".

Similarly, if I try

cv::blur(src,src,Size(3,3));

I get 3 such columns.

Same with other operations - Gaussian blur, erode etc

Only other operation I have tested that works fine without a problem is clone().

Can anyone hazard a guess as to why this might be happening?

I'm working on a device which does not have a proper port of OpenCV so all OS related tasks(reading and writing images) are being done by hand.

=====UPDATE======

So I've been experimenting a little.

I can make calls such as

cv::medianBlur(inter,dest,3);

and there is output (albeit distorted as described above). But when I do something like

cv::cvtColor(inter, dest, COLOR_RGBA2RGB);

I'm getting segfault errors. Is there a fundamental difference in how these functions work that may be indicative of the problem?