[−][src]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: :
ⓘThis example is not tested
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 putText