How to realize corrosion and expansion of OpenCV

This article will explain in detail how to achieve corrosion and expansion of OpenCV. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Corrosion and expansion are also well used in image processing. We can change corrosion to minimum filtering and expansion to maximum filtering.

Or pick up our old DEMO?

Add corrosion and expansion to the Clistitem class

Then add these two projects to the loaded list

Then we add corrosion and expansion methods to the ImgDealUtil class

/ / corrosion and expansion

Public static void erodOrDilate (String command, Bitmap bmp) {

Boolean erode = command.equals (Clistitem.IMAGE_ERODECOMMAND)

Mat src = new Mat ()

Mat dst = new Mat ()

Utils.bitmapToMat (bmp, src)

/ / structure element, get the structure element

/ / Imgproc.MORPH_RECT sets our parameter to rectangle

/ / new Size defaults to the effect of 3: 3

/ / the final Point-1,-1 is still the central point.

Mat strElement = Imgproc.getStructuringElement (Imgproc.MORPH_RECT, new Size (3,3), new Point (- 1,-1))

If (erode) {

Imgproc.erode (src, dst, strElement, new Point (1,-1), 1)

} else {

Imgproc.dilate (src, dst, strElement, new Point (1,-1), 1)

}

Utils.matToBitmap (dst, bmp)

Src.release ()

Dst.release ()

StrElement.release ()

}

Finally, we add calls to these two methods to the button event of Mainactivity

Then we run the program to see how it works.

Original drawing

Corrosion-minimum filtration effect

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