MATLAB Answers

Faster way to draw bounding box around object in an image?

23 views (last 30 days)
Louise Wilson
Louise Wilson on 16 May 2019
Commented: KSSV on 16 May 2019
Hi everyone,
I am new to Matlab and this is my first attempt at image processing. I want to count the number of boats in a large collection of images like this:
BoundingBox.jpg
The code I used to draw this box is quite simple:
rgbImage=imread('scene00074.png');
imshow(rgbImage);
hold on
rectangle('Position', [960, 490, 125, 40],... %right, top, width, height
'EdgeColor','r','LineWidth',3)
I did this by trial and error, changing the numbers until I got the box in the right spot. I need to do this with a lot of images and then I plan eventually to use google vision to analyse my photos... is there a faster way, maybe using an interface, to select where the box goes? Prior to giving me the bounding box vertices?
Also, right now I have the pixel vertices but how would I get the vertices from 0-1?
Thanks!

  1 Comment

KSSV
KSSV on 16 May 2019
If you are talking about drawing rectangles manually; read about imrect.

Sign in to comment.

Answers (0)

Products


Release

R2018b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!