Possible parameter names for matrix cv mat.
Create cv mat c.
The same limitation as for inputarray.
Creating a mat object explicitly.
The class mat represents an n dimensional dense numerical single channel or multi channel array.
There are many different ways to create cv mat object.
Or use the universal filestorage i o functions to save the image to xml or yaml format.
The sample below shows how to create a bgra image how to set custom compression parameters and save it to a png file.
Cv 8uc1 means 8 bit single channel matrix cv 32fc2 means 2 channel i e.
We can create a matrix with more than two dimensions.
Be aware that this only works for two dimensional matrices.
Do not explicitly create outputarray instances applies here too.
We can use array to initialize the constructor.
N dimensional dense array class.
Type has the same meaning as in cvcreatemat function e g.
Just like with inputarray opencv users should not care about outputarray they just pass mat vector t etc.
You can do this using the operator of mat.
Using cv mat create nrows ncols type method or the similar constructor cv mat mat nrows ncols type fill value constructor.
Here are the some popular ones.
The name starts with a lower or upper case character hence a value between a z or a z.
Each implementation calls mat create for a destination matrix.
However for debugging purposes it s much more convenient to see the actual values.
The parameters which you add to the cv mat must have a name which fits to the following rules.
This type is very similar to inputarray except that it is used for input output and output function parameters.
To the contrary with c api where an output image had to be created by the developer an empty output mat can be supplied to each function.
If the format depth or channel order is different use mat convertto and cv cvtcolor to convert it before saving.
Complex floating point matrix etc.
If you want to make your function polymorphic i e.
If it is not empty and has the correct size and type the method does nothing.
Mat l 3 arr cv 8uc 1 scalar all 0.
The first character of the name can be followed by an infinite number of alpha numerical characters including characters like or.
Int arr 3 4 3 2.
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.
