Careful this code is just a snippet showing how i did.
Create cv mat from buffer.
This type is very similar to inputarray except that it is used for input output and output function parameters.
Cv 8u cv 8uc1 cv 8uc 1 here are the samples of the convention.
Gstbuffer buffer gst buffer new wrapped.
The same limitation as for inputarray.
Cv 8uc n n channel array with 8 bit unsigned integers n can be from 1 to 512 note.
If you want to make your function polymorphic i e.
2x4 single channel array with 32 bit floating point numbers.
Gstflowreturn prepare buffer gstappsrc appsrc cv mat frame guint size 1280 720 4.
Void buffer destroy gpointer data cv mat done cv mat data.
Dearest naing nyan openvino samples usually use opencv to read in images and yes opencv returns bgr.
Mat img 2 4 cv 32f.
Just like with inputarray opencv users should not care about outputarray they just pass mat vector t etc.
A header and a data block.
The cv mat data structure is essentially made up of two parts.
N dimensional dense array class.
Do not explicitly create outputarray instances applies here too.
The class mat represents an n dimensional dense numerical single channel or multi channel array.
Here s an example i m using with appsrc which works fine warning.
It can be used to store real or complex valued vectors and matrices grayscale or color images voxel volumes vector fields point clouds tensors histograms though very high dimensional histograms may be better stored in a sparsemat.
I m attempting to convert a cmsamplebufferref as part of the avcapturevideodataoutputsamplebufferdelegate in ios to an opencv mat in an attempt to stabilise the.
The previous recipe showed you how to access some of the attributes of this structure contained in its header for example by using cols rows or channels.
So if you trained your model on rgb layout then you definitely need to specify reverse input channels to model optimizer.
3x5 4 channel array with 8 bit floating point numbers.
I d recommend using gst buffer new wrapped full instead that saves a buffer copy.
The header contains all the information associated with the matrix size number of channels data type and so on.
