createMat

Create MATLAB Interface Object for OpenCV Mat and InputArray Class

Read an image into the MATLAB workspace.

img = imread("cameraman.tif");

Create a MATLAB interface object for the OpenCV Mat class and store the image data. The function also creates an interface object for the OpenCV InputArray class that is constructed from the Mat class.

[ocvMat,ocvArray] = createMat(img);

Display and inspect the properties of the MATLAB interface object for the OpenCV Mat class.

ocvMat

ocvMat = 
  MatND with properties:

        flags: 1124024320
         dims: 2
         rows: 256
         cols: 256
    allocator: [1x1 clib.opencv.cv.MatAllocator]
            u: [1x1 clib.opencv.cv.UMatData]
         size: [1x1 clib.opencv.cv.MatSize]
         step: [1x1 clib.opencv.cv.MatStep]

Inspect the type of array class returned by the function.

ocvArray

ocvArray = 
  x_InputArray with no properties.

Use the getImage utility function to read the image stored in the InputArray class. Display the image.

outImg = getImage(ocvArray);
figure
imshow(outImg)

Create MATLAB Interface Object for OpenCV Mat and OutputArray Classes

Add the prebuilt MATLAB interface to OpenCV package name to the import list.

import vision.opencv.util.*

Create a MATLAB interface object for the OpenCV Mat class. The function also creates an interface object for the OpenCV OutputArray class that is constructed from the Mat class.

[ocvMat,ocvArray] = createMat;

Display and inspect the properties of the MATLAB interface object for the OpenCV Mat class.

ocvMat

ocvMat = 
  MatND with properties:

        flags: 1124007936
         dims: 0
         rows: 0
         cols: 0
    allocator: [1x1 clib.opencv.cv.MatAllocator]
            u: [1x1 clib.opencv.cv.UMatData]
         size: [1x1 clib.opencv.cv.MatSize]
         step: [1x1 clib.opencv.cv.MatStep]

Inspect the type of array class returned by the function.

ocvArray

ocvArray = 
  x_OutputArray with no properties.

Specify Array Class to Construct from OpenCV Mat Class

Add the prebuilt MATLAB interface to OpenCV package name to the import list.

import vision.opencv.util.*

Read an image into the MATLAB workspace.

img = imread("cameraman.tif");

Create a MATLAB interface object for the OpenCV Mat class. Specify the array type as "InputOutput" for the function to construct the OpenCV InputOutputArray class from the Mat class.

arrayType = "InputOutput";
[ocvMat,ocvArray] = createMat(img,arrayType);

Display and inspect the properties of the MATLAB interface object for the OpenCV Mat class.

ocvMat

ocvMat = 
  MatND with properties:

        flags: 1124024320
         dims: 2
         rows: 256
         cols: 256
    allocator: [1x1 clib.opencv.cv.MatAllocator]
            u: [1x1 clib.opencv.cv.UMatData]
         size: [1x1 clib.opencv.cv.MatSize]
         step: [1x1 clib.opencv.cv.MatStep]

Inspect the type of array class returned by the function.

ocvArray

ocvArray = 
  x_InputOutputArray with no properties.