Models: How to increase the font size of the bounding box in Tensorflow object detection module?

Created on 26 Oct 2017 · 9Comments · Source: tensorflow/models

I have increased the font size to 30 from the default size 24 inside the draw_bounding_box_on_image() in visualization_utils.py

font = ImageFont.truetype('arial.ttf', 30)

But still the font size is not getting changed.

object detection

Source

biranchi2018

Most helpful comment

I had to install ttf-mscorefonts. Ubuntu 18.04

sudo apt-get install ttf-mscorefonts-installer
sudo fc-cache
fc-match Arial

Should show: Arial.ttf: "Arial" "Regular"

seth814 on 23 Jul 2019

👍2 🎉1

All 9 comments

i found the issue.
On Mac we need to give the full path.
ImageFont.truetype('/Library/Fonts/Arial.ttf', 30)

biranchi2018 on 26 Oct 2017

👍3 👎2

Yes!
This happens because it falls back on the default font, for which you cannot set size.
Another option, if you don't want to change the source code, is to put the arial.ttf font file in the directory where you're running that code.

Let's use StackOverflow for further support, so the devs here can focus on bugs. Since you've found the answer yourself, you would've gained at least 20 rep on SO 😃

cipri-tom on 26 Oct 2017

@afixibiranchi I alos use mac , and i change it to the full path. but it still don't work ...

cindysillence on 29 Nov 2017

It works for me.
Copy font to folder with script

cp /Library/Fonts/Arial.ttf Arial.ttf

and in script:

ImageFont.truetype('./Arial.ttf', 30)

Alykoff on 9 Dec 2017

Anyone know the solution to this for Windows? Where is Arial.ttf located?

dburns7 on 8 Oct 2018

Hi,

Solution is simple:
in file models/research/object_detection/utils/visualization_utils.py
starting from line 202:

  try:
    font = ImageFont.truetype('arial.ttf', 24)
  except IOError:
    font = ImageFont.load_default()

Here we just need to change number 24 to desired font size.

LjuboM on 21 Jul 2019

Did everything suggested here. still not working. I am using amazon ec2 instance. Funny thing is I having added print statements in Visualisation_utils.py but its not event printing anything. Anything I am missing? Also I am using Zeppelin notebook if that can play any role in this.

Update: I resolved the issue. It seems like the python file Visualisation_utils.py was cached. I restarted the interpreter and it worked like a charm. I had to change the font with full path though.

sahilshaikh89 on 22 Jul 2019

I had to install ttf-mscorefonts. Ubuntu 18.04

sudo apt-get install ttf-mscorefonts-installer
sudo fc-cache
fc-match Arial

Should show: Arial.ttf: "Arial" "Regular"

seth814 on 23 Jul 2019

👍2 🎉1

I had the same issue, doing what seth814 suggested worked for me. I am also using Ubuntu 18.04.
downloaded about 240KB of font data if u like to know space needed.

Thanks.