在opencv中下面的代码行是什么意思？ [英] What is the meaning of following code line in opencv?

问题描述

此代码行的含义是什么？如何将此代码转换为javacv？

What does this code line means and how can I convert this code into javacv?

gray = Scalar::all(255);

这是与此代码行相关的完整代码。

This is whole code which related to this code line.

Mat src = imread("in.jpg"), gray;

cvtColor(src, gray, CV_BGR2GRAY);
threshold(gray, gray, 230, 255, THRESH_BINARY_INV);
vector<Vec4i> hierarchy;
vector<vector<Point> > contours;
findContours(gray, contours, hierarchy, CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE);

gray = Scalar::all(255);

有人可以解释一下吗？

推荐答案

正如我在评论中提到的，它用于将灰色图像设置为白色。

As I mentioned in my comment, it is used to set the gray image to white.

它的好处是什么？只有当我们知道这个代码是什么或者看到完整代码时才可以说。

What is its benefit? It can be said only if we know what is this code for or see the full code.

关于Java，OpenCV现在有一些android样本，你可以在其中找到Java代码。

Regarding Java, OpenCV has now some android samples, in which you can find Java codes.

您可以查看它们。 我在那里看到了类似的功能： mWhilte = Scalar.all（255）;

You can check them. I saw a similar function there : mWhilte = Scalar.all(255);

另请查看JavaCV示例： http://code.google.com/ p / javacv / wiki / OpenCV2_Cookbook_Examples_Chapter_2

Also check the JavaCV samples : http://code.google.com/p/javacv/wiki/OpenCV2_Cookbook_Examples_Chapter_2

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