Apply Gamma Correction to an Image using OpenCV
Images can look either too light or too dark. Gamma correction is a method that allows to control the brightness of an image. The formula used to get gamma corrected…
Computer Vision
Apply Histogram Equalization to an Image using OpenCV
Histogram equalization is a method in image processing that allows to adjust the contrast of an image using histogram. Histogram equalization transforms pixel intensity values so that the histogram of…
Convert Image from RGB to HSV Color Space using OpenCV
HSV is a color space that has three components: hue, saturation and value. When implementing object tracking based on color, images are often converted from RGB to HSV color space.…
Save Image to Specified File using OpenCV
While working with image processing, we might need to save intermediate image or final resulting image to a specified file. OpenCV provides imwrite function that allows to save an image…
YOLOv4 Object Detection using OpenCV
YOLO (You Only Look Once) is an object detection algorithm that allows to detect objects in an images in near real-time. YOLOv4 is 4th version of YOLO which introduced in…
Bilateral Filtering of the Image using OpenCV
There are many algorithms to reduce noise in an image. A bilateral filter is often used for noise reduction while preserving edges in an image. This filter calculates a weighted…
Median Filtering of the Image using OpenCV
There are various algorithms that allows to reduce noise in an image. One of them is median filter. This filter calculates the median of all the pixels in the kernel…
Image Thresholding Based on Otsu’s Method using OpenCV
Image thresholding is a technique that allows to perform image binarization based on pixel values. Usually, if the pixel value is greater than a threshold, it is set to a…
Capture RTSP Stream from IP Camera using OpenCV
Most of the IP cameras supports Real Time Streaming Protocol (RTSP) to control audio and video streaming. This tutorial provides example how to capture RTSP stream from IP camera using…
Convert RGB Image to Grayscale Image using OpenCV
During image processing RGB images are often converted to grayscale images because smaller amount of data allows to perform more complex image processing operations faster. This tutorial provides example how…