影像合成(2)
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Bitwise Operations
示範圖片
程式碼
# Load two images img1 = cv.imread('messi5.jpg') img2 = cv.imread('opencv-logo-white.png') assert img1 is not None, "file could not be read, check with os.path.exists()" assert img2 is not None, "file could not be read, check with os.path.exists()" # I want to put logo on top-left corner, So I create a ROI rows,cols,channels = img2.shape roi = img1[0:rows, 0:cols] # Now create a mask of logo and create its inverse mask also img2gray = cv.cvtColor(img2,cv.COLOR_BGR2GRAY) ret, mask = cv.threshold(img2gray, 10, 255, cv.THRESH_BINARY) mask_inv = cv.bitwise_not(mask) # Now black-out the area of logo in ROI img1_bg = cv.bitwise_and(roi,roi,mask = mask_inv) # Take only region of logo from logo image. img2_fg = cv.bitwise_and(img2,img2,mask = mask) # Put logo in ROI and modify the main image dst = cv.add(img1_bg,img2_fg) img1[0:rows, 0:cols ] = dst cv.imshow('res',img1) cv.waitKey(0) cv.destroyAllWindows()