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getImage

Read images stored in MATLAB interface object for OpenCV class

Since R2021b

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    Syntax

    outputImg = getImage(ocvInput)

    Description

    outputImg = getImage(ocvInput) reads the image stored in a MATLAB® interface object for an OpenCV class and writes it to the specified output variable outputImg in the MATLAB workspace.

    example

    Examples

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    This example uses:

    Open Live Script

    Add the MATLAB interface to OpenCV package names to the import list.

    import clib.opencv.*
import vision.opencv.util.*

    Read an image into the MATLAB workspace. 

    img = imread("cameraman.tif");

    Create a MATLAB interface object for the OpenCV InputOutput array class.

    [ocvMat,ocvArray] = createMat(img);

    Read the image stored in the InputOutput interface object.

    output = getImage(ocvArray);

    Display the output image.

    figure
imshow(output)

    Figure contains an axes object. The hidden axes object contains an object of type image.

    Input Arguments

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    MATLAB interface object for an OpenCV class, specified as one of these values:

    • MatND interface object — Created by using the createMat function and represents the OpenCV cv::Mat class.

    • UMat interface object — Created by using the createUMat function and represents the OpenCV cv::UMat class.

    • InputArray interface object — Created by using the createMat or createUMat function and represents the OpenCV cv::_InputArray class. The InputArray interface object passes array inputs to the OpenCV functions.

    • InputOutputArray interface object — Created by using the createMat or createUMat function and represents the OpenCV cv::_InputOutputArray class. The InputOutputArray interface object passes array inputs to the OpenCV functions and writes the array outputs returned by the OpenCV functions.

    • OutputArray interface object — Created by using the createMat or createUMat function and represents the OpenCV cv::_OutputArray class. The OutputArray interface object contains the array outputs returned by the OpenCV functions.

    Output Arguments

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    Output image read from a MATLAB interface object, returned as an M-by-N matrix for intensity images and M-by-N-by-3 array for color images.

    Version History

    Introduced in R2021b

    See Also

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