Afaik hershey is a proportional font not all letters have same width. It assumes that the target image is bgr.
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Opencv cv font example. A segmentation algorithm takes an image as input and outputs a collection of regions or segments which can be represented as a collection of contours as shown in figure 1. It puts the texts center to the given point. Text you want to write on image. Image on which you can write the text. As you can see from the above example you can provide. In opencv only a subset of hershey fonts are supported.
In opencv2corehpp you can find this enum hersheyfonts. In the above example we have provided a sample image and wrote some text. In computer vision the term image segmentation or simply segmentation refers to dividing the image into groups of pixels based on some criteria. If you want some different positioning you have to modify the cairomoveto call. Distance along horizontal and vertical axis from top left corner of the image. A vertex of the triangle lies on an edge of the rectangle so handlenested can be false and an intersection is still found.
Only a subset of hershey fonts enum hersheyfonts fonthersheysimplex 0 normal size sans serif font fonthersheyplain 1 small size sans serif font fonthersheyduplex 2 normal size sans serif font more complex than fonthersheysimplex fonthershey. Maybe you need a lookup table width per letter berak 2013 02 23 053304 0500 edit. Puttextcairomat hello world cvpoint2d5050 arial 15 cvscalar00255 false false.
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