Function opencv::imgproc::get_text_size

pub fn get_text_size(
    text: &str, 
    font_face: i32, 
    font_scale: f64, 
    thickness: i32, 
    base_line: &mut i32
) -> Result<Size>

Calculates the width and height of a text string.

The function cv::getTextSize calculates and returns the size of a box that contains the specified text. That is, the following code renders some text, the tight box surrounding it, and the baseline: :

   String text = "Funny text inside the box";
   int fontFace = FONT_HERSHEY_SCRIPT_SIMPLEX;
   double fontScale = 2;
   int thickness = 3;
 
   Mat img(600, 800, CV_8UC3, Scalar::all(0));
 
   int baseline=0;
   Size textSize = getTextSize(text, fontFace,
                                fontScale, thickness, &baseline);
   baseline += thickness;
 
   // center the text
   Point textOrg((img.cols - textSize.width)/2,
                  (img.rows + textSize.height)/2);
 
   // draw the box
   rectangle(img, textOrg + Point(0, baseline),
              textOrg + Point(textSize.width, -textSize.height),
              Scalar(0,0,255));
   // ... and the baseline first
   line(img, textOrg + Point(0, thickness),
         textOrg + Point(textSize.width, thickness),
         Scalar(0, 0, 255));
 
   // then put the text itself
   putText(img, text, textOrg, fontFace, fontScale,
           Scalar::all(255), thickness, 8);

Parameters

• text: Input text string.
• fontFace: Font to use, see #HersheyFonts.
• fontScale: Font scale factor that is multiplied by the font-specific base size.
• thickness: Thickness of lines used to render the text. See #putText for details.
• baseLine:[out] y-coordinate of the baseline relative to the bottom-most text point.

Returns

The size of a box that contains the specified text.

See also

putText