print bounding box label text with draw_on_image

[namangt68]

Hi, thanks for the useful library.

Right now we can print image with BBs using draw_on_image function as mentioned here also.
image_output = bbs.draw_on_image(image, thickness=2)
It would useful if we wil be able to print bounding box label string on the image using something like image_output = bbs.draw_on_image(image, thickness=2, print_label=True)

BoundingBox class already have label parameter.
class imgaug.imgaug.BoundingBox(x1, y1, x2, y2, label=None)

[aleju]

Seems reasonable. I added it to the TODO list.

[lmolhw5252]

How to set label in chinese? I had try it but chinese is not normal display!

[aleju]

imgaug currently uses PIL's text drawing function with a custom font file, saved under under imgaug/DejaVuSans.ttf. I doubt that the file contains any chinese characters. It's probably limited to ASCII. The path to the ttf file is set in imgaug.imgaug.DEFAULT_FONT_FP. You could try to replace it by another font file containing chinese characters, e.g. imgaug.imgaug.DEFAULT_FONT_FP = "/path/to/some/file.ttf". (Not sure though if these characters can be saved in ttf files or if PIL's drawing function supports non-ASCII characters.)