OpenCV/contourfinder.py

import cv2 
import sys
from cv2 import CONTOURS_MATCH_I2
import numpy as np

#Takes two inputs as images
#Original 1 and 2 are dummy data

original =cv2.imread(r"Animate\images\flag (1).png")
original2 =cv2.imread(r"Animate\images\brain2.png")

# get key positions at which frame needs to be generated
def list_of_positions(num_contours,num_frames=100):
   positions=[]
   for i in range(0, num_frames):
      positions.append(int(num_contours/num_frames*i)) 
   return positions 



def contourfinder(image1, image2, text=None):
    #Create two blank pages to write into
    blank = np.zeros(image1.shape, dtype='uint8')
    blank2 = np.zeros(image1.shape, dtype='uint8')


    #Threshold and contours for image 1 and 2
    threshold=cv2.Canny(image=image1, threshold1=100, threshold2=200)
    contours, hierarchies = cv2.findContours(threshold, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)

    threshold2=cv2.Canny(image=original2, threshold1=100, threshold2=200)
    contours2, hierarchies2 = cv2.findContours(threshold2, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)


    #Initialize three empty videos
    vid1 = cv2.VideoWriter('vid1.mp4',cv2.VideoWriter_fourcc(*'mp4v'), 24, threshold.shape)
    vid2 = cv2.VideoWriter('vid2.mp4',cv2.VideoWriter_fourcc(*'mp4v'), 24, threshold.shape) 
    text_vid = cv2.VideoWriter('text_vid.mp4',cv2.VideoWriter_fourcc(*'mp4v'), 10, threshold.shape) 

    
    #Get positions
    positions=list_of_positions((len(contours)))
    frames=[]


    #Loop over contours adding them to blank image then writing to video
    for i in range(0, len(contours)):
        cv2.drawContours(blank, contours=contours, contourIdx=i, color=(125, 200, 255), thickness=1) 

        if i in positions:
            frames.append(blank)
            
            #Complile to video
            vid1.write(blank)
        vid1.release()

    positions=list_of_positions((len(contours2)))

    for i in range(0, len(contours2)):
        cv2.drawContours(blank2, contours=contours2, contourIdx=i, color=(125, 200, 255), thickness=1) 
        if i in positions:
            frames.append(blank2)
            
            vid2.write(blank2)
        vid2.release()

    
    #Next is the text vid

    if text !=None:	
        # Reading an image in default mode
        image = np.zeros(original.shape, dtype='uint8')
            
        # font
        font = cv2.FONT_HERSHEY_COMPLEX

        # org
        org = (10, 400)

        # fontScale
        fontScale = 3

        # Blue color in BGR
        color = (186, 184, 108)

        # Line thickness of 2 px
        thickness = 4




        def text_frames(text,image,org):
            spacing=55 #spacing between letters
            blink=image
            cv2.imwrite(f"blink.png", blink)
            for i in range(0, len(text)-1):
                
                text_vid.write(blink)
            
                # Using cv2.putText() method
                image = cv2.putText(image, text[i], org, font,
                    fontScale, color, thickness, cv2.LINE_AA)

                #Take care of org spacing
                org=(org[0]+spacing,org[1])
                if text[i].isupper():
                    org=(org[0] +spacing +1, org[1])
                    print(f"Upper {text[i]}")
                print(org)

                # Displaying the image
                cv2.imwrite(f"text_im{i}.png", image)

                #Complile to video
                text_vid.write(image)
            text_vid.release()

        text_frames(text,image,org)
        

contourfinder(original, original2, "spies gui Fly")