HoloCall/holocall.py at master · S-FK/HoloCall · GitHub

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import numpy as np
import cv2

def rotate_bound(image, angle):
    # grab the dimensions of the image and then determine the
    # center
    (h, w) = image.shape[:2]
    (cX, cY) = (w // 2, h // 2)

    # grab the rotation matrix (applying the negative of the
    # angle to rotate clockwise), then grab the sine and cosine
    # (i.e., the rotation components of the matrix)
    M = cv2.getRotationMatrix2D((cX, cY), -angle, 1.0)
    cos = np.abs(M[0, 0])
    sin = np.abs(M[0, 1])

    # compute the new bounding dimensions of the image
    nW = int((h * sin) + (w * cos))
    nH = int((h * cos) + (w * sin))

    # adjust the rotation matrix to take into account translation
    M[0, 2] += (nW / 2) - cX
    M[1, 2] += (nH / 2) - cY

    # perform the actual rotation and return the image
    return cv2.warpAffine(image, M, (nW, nH))


def makeHologram(original, scale=0.5):

    scaleR=4

    holo = cv2.resize(original, (360, 360), interpolation = cv2.INTER_CUBIC)

    top_side = holo.copy()
    bottom_side = rotate_bound(holo.copy(),180)
    right_side = rotate_bound(holo.copy(), 90)
    left_side = rotate_bound(holo.copy(), 270)

    hologram = np.zeros([max(holo.shape)*scaleR,max(holo.shape)*scaleR,3], holo.dtype)

    center_x = int((hologram.shape[0])/2)
    center_y = int((hologram.shape[1])/2)

    vert_x = int((top_side.shape[0])/2)
    vert_y = int((top_side.shape[1])/2)

    hologram[0:top_side.shape[0], center_x-vert_x:center_x+vert_x] = top_side
    hologram[hologram.shape[1]-bottom_side.shape[1]:hologram.shape[1] , center_x-vert_x:center_x+vert_x] = bottom_side

    hori_x = int((right_side.shape[0])/2)
    hori_y = int((right_side.shape[1])/2)

    hologram[ center_x-hori_x : center_x-hori_x+right_side.shape[0] , hologram.shape[1]-right_side.shape[0] : hologram.shape[1]] = right_side
    hologram[ center_x-hori_x : center_x-hori_x+left_side.shape[0] , 0 : left_side.shape[0] ] = left_side

    return hologram


cap = cv2.VideoCapture(0)
cap.set(3,240) #width=640
cap.set(4,240) #height=480

while True:
    b, img =cap.read()
    if b:
        holo = makeHologram(img)
        cv2.resize(holo, (240, 240))
        cv2.imshow("Window",holo)
        cv2.waitKey(1)
    else:
        break
    key = cv2.waitKey(1)&0xFF
    if key == ord('q'):
        cv2.destroyAllWindows()
        break


cv2.destroyAllWindows()
cap.release()