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crop.py
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Tue, Jun 10, 19:05

crop.py
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import cv2
import numpy as np
import sys
import shutil
import os
class Crop():
def __init__(self, image_name):
self.image_name = image_name
self.lpnts = np.empty((1,0,2), dtype=np.int32)
self.rpnts = []
self.image = cv2.imread(self.image_name,-1)
self.copied_image = self.image.copy()
def crop_for_mouse(self,event,x,y,flags= None,parameters = None):
self.event = event
self.x = x
self.y = y
self.flags = flags
self.parameters = parameters
if self.event == cv2.EVENT_LBUTTONDOWN:
self.lpnts = np.append(self.lpnts, np.array([[[self.x, self.y]]]), axis=1)
cv2.polylines(self.image, [self.lpnts], False, (0, 0, 255))
elif self.event == cv2.EVENT_MBUTTONDOWN:
self.lpnts = np.append(self.lpnts, np.array([[[self.x, self.y]]]), axis=1)
cv2.polylines(self.image, [self.lpnts], True, (0, 0, 255))
self.rpnts.append(self.lpnts)
self.lpnts = np.empty((1,0,2), dtype=np.int32)
self.copied_image = self.image.copy()
elif self.event == cv2.EVENT_RBUTTONDOWN: ## can also be changed to LBUTTONDBLCLK (double left click)
self.lpnts = np.empty((1,0,2), dtype=np.int32)
self.image = self.copied_image.copy()
def do_crop(self):
cv2.namedWindow("CROP", cv2.WINDOW_NORMAL) ## Magnifying the window for more precise labelling
cv2.resizeWindow("CROP", 1000, 1000) ## 1250
cv2.setMouseCallback("CROP",self.crop_for_mouse)
self.skip = False
while True:
cv2.imshow("CROP",self.image)
cv2.setMouseCallback("CROP",self.crop_for_mouse)
keypress = cv2.waitKey(1)
if keypress == ord('r'):
self.image = self.copied_image.copy()
self.lpnts = np.empty((1,0,2), dtype=np.int32)
if keypress == ord('b'):
self.image = cv2.imread(self.image_name,-1)
self.copied_image = self.image.copy()
self.lpnts = np.empty((1,0,2), dtype=np.int32)
self.rpnts = []
if keypress == ord('n'):
#move to the next file
self.skip = True
break
if keypress == ord('c'):
self.skip = False
break
if self.skip is False:
image_path = self.image_name.split(os.path.sep)
image_orig_path = os.sep.join(image_path[:-1]) + '/PV/' + image_path[-1]
print("Saving original image to ", image_orig_path)
shutil.move(self.image_name, image_orig_path) ## Used to be: shutil.copyfile(...
mask = np.zeros(self.image.shape, dtype=np.uint8)
channel_count = self.image.shape[2]
ignore_mask_color = (255,)*channel_count
for point in self.rpnts:
cv2.fillPoly(mask, point, ignore_mask_color)
masked_image = cv2.bitwise_and(self.image,mask)
image_path = os.sep.join(image_path[:-1]) + '/PV/labels/'\
+ image_path[-1][:-4] + '_label' + \
image_path[-1][-4:]
print("Saving labelled image to ", image_path)
cv2.imshow("ROI", masked_image)
cv2.imwrite(image_path, mask) ## Writing the B&W mask (instead of masked_image)
cv2.waitKey(0)
cv2.destroyAllWindows()
else:
image_path = self.image_name.split(os.path.sep)
image_path = os.sep.join(image_path[:-1]) + '/noPV/' + image_path[-1]
print("Saving original image to ", image_path)
shutil.move(self.image_name, image_path)

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