android - 在Android框架中编辑文本

Question

如何使其“加粗”并改变颜色？有人可以帮助我吗？我尝试了很多次，但仍然无法正常工作。

Core.putText(mRgba, "Result : " +
            	contours.size(), new org.opencv.core.Point(0, 300),
            	Core.FONT_HERSHEY_SIMPLEX, 2.6f, new Scalar(255, 255, 0))         

Answer 1

Read the documentation:两者都有参数。

public static void putText(Mat img,
    java.lang.String text,
    Point org,
    int fontFace,
    double fontScale,
    Scalar color,
    int thickness)

Parameters:

• img - Image.

• text - Text string to be drawn.

• org - Bottom-left corner of the text string in the image. fontFace - Font type. One of FONT_HERSHEY_SIMPLEX, FONT_HERSHEY_PLAIN, FONT_HERSHEY_DUPLEX, FONT_HERSHEY_COMPLEX, FONT_HERSHEY_TRIPLEX, FONT_HERSHEY_COMPLEX_SMALL, FONT_HERSHEY_SCRIPT_SIMPLEX, or FONT_HERSHEY_SCRIPT_COMPLEX, where each of the font ID's can be combined with FONT_ITALIC to get the slanted letters.

• fontScale - Font scale factor that is multiplied by the font-specific base size.

• color - Text color.

• thickness - Thickness of the lines used to draw a text.

然后:

Core.putText(mRgba, 
    "Result : " + contours.size(),         
    new org.opencv.core.Point(0, 300),    
    Core.FONT_HERSHEY_SIMPLEX,         
    2.6f,                             
    new Scalar(255, 255, 0), // color in BGR format, you should change this one
    2 // thickness (can be used to achieve bold)
)