siddhant-swaroop-dash
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| # get shape of arrow image | |
| rows,cols,channel = img2.shape | |
| # region of image of logo image with same dimensions as arrow image | |
| roi = img3[0:rows,0:cols] | |
| # converting arrow image to grayscale and thresholding | |
| img2gray = cv2.cvtColor(img2,cv2.COLOR_BGR2GRAY) | |
| _ , mask = cv2.threshold(img2gray,200,255,cv2.THRESH_BINARY) | |
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| cv2.imshow('not',cv2.bitwise_not(img1)) # not | |
| cv2.imshow('and',cv2.bitwise_and(img1,img2)) # and | |
| cv2.imshow('or',cv2.bitwise_or(img1,img2)) # or | |
| cv2.imshow('xor',cv2.bitwise_xor(img1,img2)) # xor | |
| cv2.waitKey(0) | |
| cv2.destroyAllWindows() |
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| cv2.imshow('wadd',cv2.addWeighted(img1,0.6,img2,0.4,0)) | |
| cv2.waitKey(0) | |
| cv2.destroyAllWindows() |
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| # mathematical operators | |
| cv2.imshow('+',img1+img2) | |
| cv2.imshow('-',img1-img2) | |
| cv2.imshow('*',img1*img2) | |
| # cv2 functions | |
| cv2.imshow('add',cv2.add(img1,img2)) | |
| cv2.imshow('sub',cv2.subtract(img1,img2)) | |
| cv2.imshow('mul',cv2.multiply(img1,img2)) |
siddhant-swaroop-dash
/ operations with scalar to image w functions
Last active
October 11, 2020 07:06
cv2 begin part 2
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| cv2.imshow('+100',cv2.add(img1,100)) # add 100 | |
| cv2.imshow('-100',cv2.subtract(img1,100)) # subtract 100 | |
| cv2.imshow('*5',cv2.multiply(img1,5)) # multiply 5 | |
| cv2.waitKey(0) | |
| cv2.destroyAllWindows() |
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| img1 = cv2.imread('c:/Users/siddhant.dash/Downloads/left.jpg') | |
| img2 = cv2.imread('c:/Users/siddhant.dash/Downloads/up.jpg') | |
| img3 = cv2.imread('c:/Users/siddhant.dash/Downloads/among_us.png') |
siddhant-swaroop-dash
/ operations with scalar to image
Created
October 11, 2020 06:07
image operations with scalars
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| cv2.imshow('+150',img1+150) | |
| cv2.imshow('-250',img1-250) | |
| cv2.imshow('x10',img1*10) | |
| cv2.waitKey(0) | |
| cv2.destroyAllWindows() |
siddhant-swaroop-dash
/ thresholding
Created
September 28, 2020 02:49
Medium Blog : Computer Vision for Beginners (part 1) : import libs
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| gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) | |
| cv2.imshow('gray',gray) | |
| val1,th1 = cv2.threshold(gray,125,255,cv2.THRESH_BINARY) | |
| cv2.imshow('t1',th1) | |
| val2,th2 = cv2.threshold(gray,125,255,cv2.THRESH_BINARY+cv2.THRESH_OTSU) | |
| cv2.imshow('t2',th2) | |
| th3 = cv2.adaptiveThreshold(gray,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C,cv2.THRESH_BINARY,155,1) |
siddhant-swaroop-dash
/ writing\drawing
Created
September 28, 2020 02:09
Medium Blog : Computer Vision for Beginners (part 1) : Writing on image
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| # Write Text on Image | |
| img1 = cv2.putText(img.copy(),'Klaus',(30,150),cv2.FONT_HERSHEY_SIMPLEX,1,(200,100,0),2,cv2.LINE_AA) | |
| cv2.imshow('1',img1) | |
| # Draw Rectangle on Image | |
| img2 = cv2.rectangle(img.copy(),(60,0),(150,120),(0,0,255),2) | |
| cv2.imshow('2',img2) | |
| # Draw Circle on Image | |
| img3 = cv2.circle(img.copy(),(80,80),30,(0,255,255),2) |
siddhant-swaroop-dash
/ Image Slicing
Created
September 27, 2020 15:58
Medium Blog : Computer Vision for Beginners (part 1) : Image Slicing
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| cv2.imshow('Cropped',img[0:120,60:150]) | |
| cv2.waitKey(0) | |
| cv2.destroyAllWindows() |
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