after effects drop shadow ignore bounding box

#After effects drop shadow ignore bounding box code#

detected a face where one wasn’t) or (2) failed to detect a face. It would be far worse if your detector either (1) reported a false positive (i.e. It indicates that your detector is working as expected. In fact, I don’t even want to call it a “problem” at all! It’s a good problem to have. Like I said, this is common “problem” when utilizing object detection methods. While each detection may in fact be valid, I certainty don’t want my classifier to report to back to me saying that it found six faces when there is clearly only one face. Hepburns face in the image - but the detection fired a total of six times! I forked my Python framework for object detection using HOG and a Linear SVM and trained it to detect faces. However, no matter which HOG + Linear SVM method you choose, you will (with almost 100% certainty) detect multiple bounding boxes surrounding the object in the image.įor example, take a look at the image of Audrey Hepburn at the top of this post. Extensions to this method exist including Felzenszwalb et al.’s deformable parts model and Malisiewicz et al.’s Exemplar SVM. These are the bare minimum steps required to build an object classifier using Histogram of Oriented Gradients. (Note: Images utilized in this post were taken from the MIT + CMU Frontal Face Images dataset) Even in low contrast images, faces can be easily detected. Evaluating your classifier on your test dataset, utilizing non-maximum suppression to ignore redundant, overlapping bounding boxesĪfter applying these steps you’ll have an object detector that is as smooth as, well, John Coltrane: Figure 1: My Python object detection framework applied to face detection.Re-training your Linear SVM using the hard-negative samples.This method can be broken into a 6-step process, including: If you remember, last week we discussed Histogram of Oriented Gradients for Objection Detection. And today that work includes writing a blog post about Felzenszwalb et al. And honestly, without the aide of copious amounts of pumpkin spice lattes and the beautiful sunrise over the crisp autumn leaves, I don’t think I would leave my cozy bed.īut I have work to do. Sometimes it’s hard to even get out of bed in the morning.

#After effects drop shadow ignore bounding box code#

Click here to download the source code to this postĬonnecticut is cold.