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If you are a Harry Potter fan like me, you would know what an Invisibility Cloak is. Yes! It’s the cloak which Harry Potter uses to become invisible. Of course, we all know that an invisibility cloak is not real — it’s all graphics trickery. In this post, we will learn how to create our […]
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Last year, Google released such a dataset called Open Images V4 which contains 15.4M annotated bounding boxes for over 600 object categories. It has 1.9M images and is largest among all existing datasets with object location annotations. The classes include a variety of objects in various categories. It covers classes varying from different kinds of […]
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There is a common saying, “A picture is worth a thousand words“. In this post, we are going to take that literally and try to find the words in a picture! In an earlier post about Text Recognition, we discussed how Tesseract works and how it can be used along with OpenCV for text detection as well […]
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In this post, we will learn how to implement a simple Video Stabilizer using a technique called Point Feature Matching in OpenCV library. We will discuss the algorithm and share the code(in python) to design a simple stabilizer using this method in OpenCV. This post’s code is inspired by work presented by Nghia Ho here and the post from […]
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YOLOv3 is one of the most popular real-time object detectors in Computer Vision. In our previous post, we shared how to use YOLOv3 in an OpenCV application. It was very well received and many readers asked us to write a post on how to train YOLOv3 for new objects (i.e. custom data). In this step-by-step […]
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In this post, we will learn how to squeeze the maximum performance out of OpenCV’s Deep Neural Network (DNN) module using Intel’s OpenVINO toolkit
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In this post, we will compare the performance of various Deep Learning inference frameworks on a few computer vision tasks on the CPU. Surprisingly, with one exception, the OpenCV port of various deep learning models outperform the original implementation when it comes to performance on a CPU. In this post, we will compare the CPU […]
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In a mobile environment like Android, if you choose OpenCV for production, one of your important goals is to bring down the size of the library and also make it performance ready. OpenCV is an awesome library with tons of Computer Vision algorithms but usually, you use a small subset of these algorithms in your […]
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My OpenCV Android SDK = handpicked, small size library   If you choose OpenCV for production, your primary goal is to bring down the size of the library and also make it performance ready. OpenCV is an awesome library with tons of algorithms but you must be using a very small subset of these algorithm in […]
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