How to get data for Matlab cascade Object Detector?

2
votes

I want to use the trainCascadeObjectDetector in Matlab. It requires an array with the regions of interest of the images. I found two apps where you can put boxes around the rois and the array gets created automatically:

Cascade Trainer: Specify Ground Truth, Train a Detector

Training Image Labeler

Unfortunately they both require Matlab R2014 and I only got R2013. Is there an other way to define the rois without manually creating the array?

Regards Philip

1
matlabimage-processingmatlab-cvstobject-detectionviola-jones
You can contact the author of the Cascade Trainer through the MATLAB File Exchange. He can send you a version that will work with R2013b. – Dima

1 Answers

0
votes

I did not find an other solution so I wrote a custom Matlab script for the job. The imrect function in Matlab is well suitable for this. After the image is shown, the user can drag a rectangular over the region of interest. The coordinates of the region than get stored in a structure together with the path to the image file. Additionally the parts of the image that do not belong to the roi are stored in the negative sample folder.