Object Detection In Deep Learning

Ten years ago, researchers thought that getting a computer to tell the distinction between different images like a cat and a dog would be almost unattainable. However, today, computer vision systems do it with more than 99 % of correctness. But how? Joseph Redmon worked on the YOLO (You Only Look Once) system, an open-source method of object detection that can recognize objects in images and videos swiftly. This is important as it can be implemented for applications including robotics, self-driving cars and cancer recognition approaches.

Deep learning working with real-life problems

As per the research on deep learning covering real-life problems, these were totally flushed by Darknet’s YOLO API. In one of the sessions of TEDx, Mr. Joseph Redmon presented triumphs of Darknet’s implementation on a smartphone. Multiclass object detection in a live feed with such performance is captivating as it covers most of the real-time applications. But without ignorin g old school techniques for fast and real-time application the accuracy of a single shot detection is way ahead.

The presented video is one of the best examples in which TensorFlow lite is kicking hard to its limitations. A Mobile app working on all new TensorFlow lite environments is shown efficiently deployed on a smartphone with Quad core arm64 architecture. The specialty of this work is not just detecting but also tracking the object which will reduce the CPU usage to 60 % and will satisfy desired requirements without any compromises.

In this blog post, We have described object detection and an assortment of algorithms like YOLO and SSD. We shall start with fundamentals and then compare object detection, with the perceptive and approach of each method.

You only Look Once (YOLO)

For YOLO, detection is a straightforward regression dilemma which takes an input image and learns the class possibilities with bounding box coordinates. YOLO divides every image into a grid of S x S and every grid predicts N bounding boxes and confidence. The confidence reflects the precision of the bounding box and whether the bounding box in point of fact contains an object in spite of the defined class. YOLO even forecasts the classification score for every box for each class. You can merge both the classes to work out the chance of every class being in attendance in a predicted box.

So, total SxSxN boxes are forecasted. On the other hand, most of these boxes have lower confidence scores and if we set a doorstep say 30% confidence, we can get rid of most of them.

Single Shot Detector (SSD)

SSD attains a better balance between swiftness and precision. SSD runs a convolutional network on input image only one time and computes a feature map. Now, we run a small 3×3 sized convolutional kernel on this feature map to foresee the bounding boxes and categorization probability.

SSD also uses anchor boxes at a variety of aspect ratio comparable to Faster-RCNN and learns the off-set to a certain extent than learning the box. In order to hold the scale, SSD predicts bounding boxes after multiple convolutional layers. Since every convolutional layer functions at a diverse scale, it is able to detect objects of a mixture of scales.

There are many algorithms with research on them going on. So which one should you should utilize?


SSD is a healthier recommendation. However, if exactness is not too much of disquiet but you want to go super quick, YOLO will be the best way to move forward. First of all, a visual thoughtfulness of swiftness vs precision trade-off would differentiate them well.

SSD is a better option as we are able to run it on a video and the exactness trade-off is very modest. While dealing with large sizes, SSD seems to perform well, but when we look at the accurateness numbers when the object size is small, the performance dips a bit.

Moving Forward

Technostacks has successfully worked on the deep learning project. We consider the choice of a precise object detection method is vital and depends on the difficulty you are trying to resolve and the set-up.

Object detection is the spine of a lot of practical applications of computer vision such as self-directed cars, backing the security & surveillance devices and multiple industrial applications.

If you are looking for the object detection related app development then we can help you. Technostacks has an experienced team of developers who are able to satisfy your needs. You can contact us for more information.

Written By : Hansal Shah - Technocrat
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