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Android OpenCV(七):多通道分离与合并

多通道分离

API

public static void split(Mat m, List<Mat> mv)
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  • 参数一:m,待分离的多通道图像
  • 参数二:mv,分离后的单通道图像

操作

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
mBinding = DataBindingUtil.setContentView(this, R.layout.activity_channel_split_merge)
mBgr = Utils.loadResource(this, R.drawable.test)
val imgList = mutableListOf<Mat>()
Core.split(mBgr, imgList)
mChannelB = imgList[0]
mChannelG = imgList[1]
mChannelR = imgList[2]
}
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通道合并

API

public static void merge(List<Mat> mv, Mat dst)
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  • 参数一:mv,需要合并的图像数组,其中每个图像必须拥有相同的尺寸和数据类型
  • 参数二:dst,合并后输出的图像,与mv[0]具有相同的尺寸和数据类型,通道数等于所有输入图像的通道数总和

操作

private fun showBGZero() {
val zero = Mat.zeros(mBgr.rows(), mBgr.cols(), CvType.CV_8UC1)
val list = mutableListOf<Mat>()
list.add(zero)
list.add(zero)
list.add(mChannelR)
val result = Mat()
Core.merge(list, result)
showMat(result)
result.release()
}

private fun showBRZero() {
val zero = Mat.zeros(mBgr.rows(), mBgr.cols(), CvType.CV_8UC1)
val list = mutableListOf<Mat>()
list.add(zero)
list.add(mChannelG)
list.add(zero)
val result = Mat()
Core.merge(list, result)
showMat(result)
result.release()
}

private fun showGRZero() {
val zero = Mat.zeros(mBgr.rows(), mBgr.cols(), CvType.CV_8UC1)
val list = mutableListOf<Mat>()
list.add(mChannelB)
list.add(zero)
list.add(zero)
val result = Mat()
Core.merge(list, result)
showMat(result)
result.release()
}

private fun showSwitchBR() {
val zero = Mat.zeros(mBgr.rows(), mBgr.cols(), CvType.CV_8UC1)
val list = mutableListOf<Mat>()
list.add(mChannelR)
list.add(mChannelG)
list.add(mChannelB)
val result = Mat()
Core.merge(list, result)
showMat(result)
result.release()
}
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结果

源码

github.com/onlyloveyd/…

本文使用 mdnice 排版