[python] import cv2 import numpy as np img = cv2.imread("red_panda.jpg") rows, cols, ch = img.shape print("Height: ", rows) print("Width: ", cols) scaled_img = cv2.resize(img, None, fx=1/2, fy=1/2) matrix_t = np.float32([[1, 0, -100], [0, 1, -30]]) translated_img = cv2.warpAffine(img, matrix_t, (cols, rows)) matrix_r = cv2.getRotationMatrix2D((cols/2, rows/2),…

Source code: [python] import cv2 import numpy as np from matplotlib import pyplot as plt img = cv2.imread("sea_beach.jpg") b, g, r = cv2.split(img) cv2.imshow("img", img) cv2.imshow("b", b) cv2.imshow("g", g) cv2.imshow("r", r) plt.hist(b.ravel(), 256, [0, 256]) plt.hist(g.ravel(), 256, [0, 256]) plt.hist(r.ravel(), 256, [0, 256]) plt.show() [/python]…

Threshold: [python] import cv2 import numpy as np img = cv2.imread("black_to_white.jpeg", cv2.IMREAD_GRAYSCALE) _, threshold_binary = cv2.threshold(img, 128, 255, cv2.THRESH_BINARY) _, threshold_binary_inv = cv2.threshold(img, 128, 255, cv2.THRESH_BINARY_INV) _, threshold_trunc = cv2.threshold(img, 128, 255, cv2.THRESH_TRUNC) _, threshold_to_zero = cv2.threshold(img, 12, 255, cv2.THRESH_TOZERO) cv2.imshow("Image", img) cv2.imshow("th binary", threshold_binary)…

What we will learn in this tutorial: What is HSV How to object recognition by color works What is HSV HSV (Hue Saturation Value) is a color format that describes colors in terms of their shade (saturation) and brightness (value).  How to object recognition by…

Source code: [python] import cv2 import numpy as np def nothing(x): pass cap = cv2.VideoCapture(0) cv2.namedWindow("frame") cv2.createTrackbar("test", "frame", 50, 500, nothing) cv2.createTrackbar("color/gray", "frame", 0, 1, nothing) while True: _, frame = cap.read() test = cv2.getTrackbarPos("test", "frame") font = cv2.FONT_HERSHEY_COMPLEX cv2.putText(frame, str(test), (50, 150), font, 4,…

Source code: [python] import cv2 import numpy as np img1 = cv2.imread("drawing_1.png") img2 = cv2.imread("drawing_2.png") bit_and = cv2.bitwise_and(img2, img1) bit_or = cv2.bitwise_or(img2, img1) bit_xor = cv2.bitwise_xor(img1, img2) bit_not = cv2.bitwise_not(img1) bit_not2 = cv2.bitwise_not(img2) cv2.imshow("img1", img1) cv2.imshow("img2", img2) cv2.imshow("bit_and", bit_and) cv2.imshow("bit_or", bit_or) cv2.imshow("bit_xor", bit_xor) cv2.imshow("bit_not", bit_not)…

Source code: [python] import cv2 import numpy as np img1 = cv2.imread("road.jpg") img2 = cv2.imread("car.jpg") img2_gray = cv2.cvtColor(img2, cv2.COLOR_BGR2GRAY) ret, mask = cv2.threshold(img2_gray, 240, 255, cv2.THRESH_BINARY) mask_inv = cv2.bitwise_not(mask) road = cv2.bitwise_and(img1, img1, mask=mask) car = cv2.bitwise_and(img2, img2, mask=mask_inv) result = cv2.add(road, car) cv2.imshow("img1", img1)…

We’re going to learn in this tutorial how to add two images using Python and Opencv. First let’s take two images. There is one condition, the images need to have the exact same size. Add images There are two different functions to add the images…

We’re going to see in this tutorial a few basic operations with the images using Opencv with Python. Watching the video we will understand: How the computer sees the image. How to select a specific area of the image (ROI) How to print or change…

In this video we are going to learn how to draw and write on images. You can read below a really quick explanation of the code.Fore more details and a complete explanation of the entire code you can check the video and I will guide…

In this tutorial we’re going to see how to load the video from it’s source whether it’s a webcam or a video file. The process is relatively simple. After we import the libraries cv2 and numpy, we need to define the cap object. To load…

Show images Load and show images with Opencv is a really simple operation. On Line 1 we import the opencv library. On Line 3 we load the image into a variable. You can put just the title of the image and the format (example .jpg)…