import glob
images = glob.glob("*.jpg")
import re
import os
import matplotlib.pyplot as plt

import numpy as np
import cv2
from PIL import Image

def natural_sort(l):
    convert = lambda text: int(text) if text.isdigit() else text.lower()
    alphanum_key = lambda key: [ convert(c) for c in re.split('([0-9]+)', key) ]
    return sorted(l, key = alphanum_key)

images = natural_sort(images)

im = cv2.imread(images[0])
#im = cv2.cvtColor(np.array(Image.open(images[0])), cv2.COLOR_BGR2GRAY)
# selective search
#im = cv2.resize(im, (newWidth, newHeight))
# create Selective Search Segmentation Object using default parameters
ss = cv2.ximgproc.segmentation.createSelectiveSearchSegmentation()

# set input image on which we will run segmentation
ss.setBaseImage(im)

# Switch to fast but low recall Selective Search method
#if (sys.argv[2] == 'f'):
ss.switchToSelectiveSearchFast()

# Switch to high recall but slow Selective Search method
#elif (sys.argv[2] == 'q'):
#ss.switchToSelectiveSearchQuality()
# if argument is neither f nor q print help message


# run selective search segmentation on input image
rects = ss.process()
print('Total Number of Region Proposals: {}'.format(len(rects)))

# number of region proposals to show
numShowRects = 100
# increment to increase/decrease total number
# of reason proposals to be shown
increment = 50

while True:
    # create a copy of original image
    imOut = im.copy()

    # itereate over all the region proposals
    for i, rect in enumerate(rects):
        # draw rectangle for region proposal till numShowRects
        if (i < numShowRects):
            x, y, w, h = rect
            cv2.rectangle(imOut, (x, y), (x+w, y+h), (0, 255, 0), 1, cv2.LINE_AA)
        else:
            break

    # show output
    cv2.imshow("Output", imOut)

    # record key press
    k = cv2.waitKey(0) & 0xFF

    # m is pressed
    if k == 109:
        # increase total number of rectangles to show by increment
        numShowRects += increment
    # l is pressed
    elif k == 108 and numShowRects > increment:
        # decrease total number of rectangles to show by increment
        numShowRects -= increment
    # q is pressed
    elif k == 113:
        break
# close image show window
cv2.destroyAllWindows()