OpenCV-CPP
This is a repository related to OpenCV-C++ Course that I learned from www.computervsion.zone
Chapter List
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Chapter 1 - (Loading Image/Video):
- In this chapter, I learned how to read & display images/videos from a source file & using a web camera.
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Chapter 2 - (Image Processing):
- Concept covered: Color conversion, blurring an image, Edge Detection, Dilation & Erosion
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Chapter 3 - (Resize & Crop):
- Resized the image using width, height & fixed ratio
- Cropped image using ROI(Region of Interest)
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Chapter 4 - (Drawing Shapes & Text):
- Created a logo using circles, rectangles, lines & text.
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Chapter 5 - (Warp Perspective):
- Step1: Define source & destination points
- Step2: Get Perspective Transformation matrix
- Step3: Apply Warp Perspective
- Step4: Plot points on the original image to show the selected points
- Step5: Display the Original Image, Wrapped Images
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Chapter 6 - (Color Detection):
- detected colors using HSV Thresholding method
- created trackbars to play with the different HSV values
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Chapter 7 - (Contour Detection & Shape Detection):
- Step 1: Preprocessing(binary image): BGR2GRAY, Gaussian Blur, Canny Edge Detection, Dilation
- Step 2: Find the contours using findContours() in binary Image
- Step 3: Add threshold condition to get contour if the size of the contour is matched
- Step 4: Calculate perimeter using arclenth() & approximate the contour with polygon
- Step 5: Calculate the bounding rectangle for the polygon & determine the no. of corners of a polygon
- Step 6: Classify the shape based on no. of corners & check the aspect ratio in order to differentiate between square & rectangle
- Step 7: Draw the contour and bounding rectangle on the original image
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Chapter 8 - (Face Detection):
- Load the image & pre-trained haarcascade_frontalface_default.xml model
- use the detectMultiScale method of CascadeClassifier to detect faces
- draw the rectangle on the detected faces