You can master Computer Vision, Deep Learning, and OpenCV - PyImageSearch
In our previous tutorial, you learned how to improve the accuracy of Tesseract OCR by supplying the appropriate page segmentation mode (PSM). The PSM allows you to select a segmentation method dependent on your particular image and the environment in…
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A few weeks ago, I demonstrated how to order the (x, y)-coordinates of a rotated bounding box in a clockwise fashion — an extremely useful skill that is critical in many computer vision applications, including (but not limited to) perspective…
Read More of Finding extreme points in contours with OpenCV
Today, we are going to start a new 3-part series of tutorials on shape detection and analysis. Throughout this series, we’ll learn how to: Compute the center of a contour/shape region. Recognize various shapes, such as circles, squares, rectangles, triangles,…
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Alright, so at this point you have been exposed to contours pretty heavily on the PyImageSearch blog. We used contours to build a kick-ass mobile document scanner. Contours enabled us detect barcodes in images. And we even leveraged the power…
Read More of Sorting Contours using Python and OpenCV
Awhile back I was going through /r/computervision when I stumbled across a question asking how to remove contours from an image using OpenCV. Intrigued, I posted a reply. The basic algorithm for removing contours from an image goes something like…
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I’ve been throwing around the idea of writing a book for the past few months, but I wasn’t sure on what the exact focus was going to be. I’ve given it a ton of thought, worked out the specifics, and…
Read More of I’m Writing a Book: “Practical Python and OpenCV: An Introductory, Example Driven Guide to Image Processing and Computer Vision”
In this tutorial, you will: Discover a technique for associating rows and columns together Learn how to detect tables of text/data in an image Extract the detected table from an image OCR the text in the table Apply hierarchical agglomerative…
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In a previous tutorial, we learned how to automatically OCR and scan receipts by: Detecting the receipt in the input image Applying a perspective transform to obtain a top-down view of the receipt Utilizing Tesseract to OCR the text on…
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In this tutorial, you will learn how to use Tesseract and OpenCV to build an automatic receipt scanner. We’ll use OpenCV to build the actual image processing component of the system, including: Detecting the receipt in the image Finding the…
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