#! /usr/bin/env python3
# coding: utf-8

import cv2
import numpy as np

class ImageManipulater:


    def resize(self, filename, outfilename):
        img = cv2.imread(filename, cv2.IMREAD_COLOR)
        orgHeight, orgWidth = img.shape[:2]
        size = (int(orgWidth*3/5), int(orgHeight*3/5))
        halfImg = cv2.resize(img, size)
        cv2.imwrite(outfilename, halfImg)


    def addBlank(self, filename, outfilename):
        img = cv2.imread(filename, cv2.IMREAD_COLOR)
        tmp = img[:, :]
        height, width = img.shape[:2]
        if (height > width):
            size = height
            limit = width
        else:
            size = width
            limit = height
        start = int((size - limit) / 2)
        fin = int((size + limit) / 2)

        # size x size の黒画像
        new_img = np.zeros((size, size, 3), dtype=np.uint8)
        # E7E7E7 gray で塗りつぶす
        new_img[:,:] = [231, 231, 231]

        if (size == height):
            new_img[:, start:fin] = tmp
        else:
            new_img[start:fin, :] = tmp
        cv2.imwrite(outfilename, new_img)


if __name__ == '__main__':
    im = ImageManipulater()
    # im.resize('./me.jpg', './new.jpeg')
    im.addBlank('./me.jpg', './new.jpeg')