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import math
import cv2
import numpy as np
from PIL import Image, ImageDraw, ImageFont
def crop_image(img, position):
def distance(x1,y1,x2,y2):
return math.sqrt(pow(x1 - x2, 2) + pow(y1 - y2, 2))
position = position.tolist()
for i in range(4):
for j in range(i+1, 4):
if(position[i][0] > position[j][0]):
tmp = position[j]
position[j] = position[i]
position[i] = tmp
if position[0][1] > position[1][1]:
tmp = position[0]
position[0] = position[1]
position[1] = tmp
if position[2][1] > position[3][1]:
tmp = position[2]
position[2] = position[3]
position[3] = tmp
x1, y1 = position[0][0], position[0][1]
x2, y2 = position[2][0], position[2][1]
x3, y3 = position[3][0], position[3][1]
x4, y4 = position[1][0], position[1][1]
corners = np.zeros((4,2), np.float32)
corners[0] = [x1, y1]
corners[1] = [x2, y2]
corners[2] = [x4, y4]
corners[3] = [x3, y3]
img_width = distance((x1+x4)/2, (y1+y4)/2, (x2+x3)/2, (y2+y3)/2)
img_height = distance((x1+x2)/2, (y1+y2)/2, (x4+x3)/2, (y4+y3)/2)
corners_trans = np.zeros((4,2), np.float32)
corners_trans[0] = [0, 0]
corners_trans[1] = [img_width - 1, 0]
corners_trans[2] = [0, img_height - 1]
corners_trans[3] = [img_width - 1, img_height - 1]
transform = cv2.getPerspectiveTransform(corners, corners_trans)
dst = cv2.warpPerspective(img, transform, (int(img_width), int(img_height)))
return dst
def calculate_size(box):
return (box[2]-box[0]) * (box[3]-box[1])
def calculate_iou(box1, box2):
xA = max(box1[0], box2[0])
yA = max(box1[1], box2[1])
xB = min(box1[2], box2[2])
yB = min(box1[3], box2[3])
interArea = max(0, xB - xA) * max(0, yB - yA)
box1Area = (box1[2] - box1[0]) * (box1[3] - box1[1])
box2Area = (box2[2] - box2[0]) * (box2[3] - box2[1])
unionArea = box1Area + box2Area - interArea
iou = interArea / unionArea
return iou
def crop(image, box, i, text_data=None):
image = Image.open(image)
if text_data:
draw = ImageDraw.Draw(image)
draw.rectangle(((text_data[0], text_data[1]), (text_data[2], text_data[3])), outline="red", width=5)
# font_size = int((text_data[3] - text_data[1])*0.75)
# font = ImageFont.truetype("arial.ttf", font_size)
# draw.text((text_data[0]+5, text_data[1]+5), str(i), font=font, fill="red")
cropped_image = image.crop(box)
cropped_image.save(f"./temp/{i}.jpg")
def in_box(box, target):
if (box[0] > target[0]) and (box[1] > target[1]) and (box[2] < target[2]) and (box[3] < target[3]):
return True
else:
return False
def crop_for_clip(image, box, i, position):
image = Image.open(image)
w, h = image.size
if position == "left":
bound = [0, 0, w/2, h]
elif position == "right":
bound = [w/2, 0, w, h]
elif position == "top":
bound = [0, 0, w, h/2]
elif position == "bottom":
bound = [0, h/2, w, h]
elif position == "top left":
bound = [0, 0, w/2, h/2]
elif position == "top right":
bound = [w/2, 0, w, h/2]
elif position == "bottom left":
bound = [0, h/2, w/2, h]
elif position == "bottom right":
bound = [w/2, h/2, w, h]
else:
bound = [0, 0, w, h]
if in_box(box, bound):
cropped_image = image.crop(box)
cropped_image.save(f"./temp/{i}.jpg")
return True
else:
return False
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