Brightness and Contrast Controlling An image must have the proper brightness and contrast for easy viewing. Brightness refers to the overall lightness or darkness of the image. Contrast is the difference in brightness between objects or regions. For example, a…
Opencv OCR Tutoiral: Build Tesseract OCR Library 3.02.02 with Qt 5.4 Mingw on Windows
Build Tesseract OCR library 3.02.02 with Qt 5.4: Steps: 1. Tesseract ocr 3.02.02 Source code Tesseract OCR 3.02.02 2. Leptonica 1.71 source code Leptonica 1.71 3. Leptonica is quite tedious to build for Mingw because of all its dependencies. But…
OpenCV Extract Contour for Using with The Desired Image
Find biggest contour using Opencv: An example to find largest contour from the input image. A contour can be considered as a sequence of points that define a specific object in an image. To get the contours from image we…
OpenCV Simple Motion Detection
Basic motion detection in OpenCV: Suppose there are 2 images and the images are in a linear subsequence with some delay t between them. If we would compare every pixel of the 2 images, and we notice they’re all the…
Simple Canny Edge Detection with Trackbar
Canny Edge Detection in OpenCV: The Canny edge detector is an edge detection operator that uses a multi-stage algorithm to detect a wide range of edges in images. It was developed by John F. Canny in 1986. Canny also produced a computational theory of edge detection explaining why the technique…