splitMission.py和generateLabel.py兩個指令碼複製到4張圖片和json所在的資料夾(最好是4的倍數因為預設以4個執行緒並行執行)中D:\pic\zhongwei\to_test\4pic
splitMission.py
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import cv2
import os
import base64
from PIL import Image
import PIL
import io
import json
import numpy as np
from multiprocessing import Pool
from generateLabel import *
import shutil
class imgToSplit():
def __init__(self,imgFile):
self.objName = imgFile.strip('.jpg')
self.img = cv2.imread(imgFile)
self.h,self.w = self.img.shape[:-1]
self.half_h,self.half_w = self.h//2,self.w//2
self.sub_json_list = []
self.disp = np.array([ (0,0) , (self.half_w,0) , (0,self.half_h) , (self.half_w,self.half_h)])
self.category = None #在3rd順便獲得category
print('executing',self.objName)
self.splitImage()
self.gen_4sub_json()
self.justDrawLabel()
self.saveSubJson()
def splitImage(self):
'''1st step ： split origin image into 4 pieces！'''
cv2.imwrite(r'.\target\%s_1.jpg' % self.objName, self.img[:self.half_h, :self.half_w])
cv2.imwrite(r'.\target\%s_2.jpg' % self.objName, self.img[:self.half_h, self.half_w:])
cv2.imwrite(r'.\target\%s_3.jpg' % self.objName, self.img[self.half_h:, :self.half_w])
cv2.imwrite(r'.\target\%s_4.jpg' % self.objName, self.img[self.half_h:, self.half_w:])
def gen_4sub_json(self):
'''2nd step : generate 4 json file to sub image!'''
def apply_exif_orientation(image):
try:
exif = image._getexif()
except AttributeError:
exif = None
if exif is None:
return image
exif = {
PIL.ExifTags.TAGS[k]: v
for k, v in exif.items()
if k in PIL.ExifTags.TAGS
}
orientation = exif.get('Orientation', None)
if orientation == 1:
# do nothing
return image
elif orientation == 2:
# left-to-right mirror
return PIL.ImageOps.mirror(image)
elif orientation == 3:
# rotate 180
return image.transpose(PIL.Image.ROTATE_180)
elif orientation == 4:
# top-to-bottom mirror
return PIL.ImageOps.flip(image)
elif orientation == 5:
# top-to-left mirror
return PIL.ImageOps.mirror(image.transpose(PIL.Image.ROTATE_270))
elif orientation == 6:
# rotate 270
return image.transpose(PIL.Image.ROTATE_270)
elif orientation == 7:
# top-to-right mirror
return PIL.ImageOps.mirror(image.transpose(PIL.Image.ROTATE_90))
elif orientation == 8:
# rotate 90
return image.transpose(PIL.Image.ROTATE_90)
else:
return image
def generateImgData(path):
try:
image_pil = PIL.Image.open(path)
except IOError:
pass
# apply orientation to image according to exif
image_pil = apply_exif_orientation(image_pil)
with io.BytesIO() as f:
image_pil.save(f, format='PNG')
f.seek(0)
raw = f.read()
return base64.b64encode(raw).decode('utf8')
for i in range(1, 5):
content = dict()
imgName = '%s_%i.jpg'%(self.objName,i)
img = cv2.imread(r'.\target\%s' % imgName)
content['version'] = '3.10.0'
content['flags'] = dict()
content['shapes'] = []
content['lineColor'] = [0, 255, 0, 128]
content['fillColor'] = [255, 0, 0, 128]
content['imagePath'] = imgName
content['imageData'] = generateImgData(r'.\target\%s' % imgName)
h, w = img.shape[:-1]
content['imageHeight'] = h
content['imageWidth'] = w
# content = json.dumps(content,indent=4)
# print(content)
# with open(r'.\target\%s' % imgName.replace('jpg', 'json'), 'w') as f:
# json.dump(content, f)
self.sub_json_list.append(content)
def justDrawLabel(self):
'''3rd 將label圖片分門別類 畫出label'''
with open('%s.json'%self.objName, 'r') as f:
data = json.load(f)
#獲取類別
classes = [shape['label'] for shape in data['shapes']]
self.category = tuple(set(classes))
imgData = data['imageData']
img = img_b64_to_arr(imgData)
categories = pointsDivByLabel(data['shapes'])
for cateName, shapes in categories.items():
label_name_to_value = {'_background_': 0}
for shape in sorted(shapes, key=lambda x: x['label']):
label_name = shape['label']
if label_name in label_name_to_value:
label_value = label_name_to_value[label_name]
else:
label_value = len(label_name_to_value)
label_name_to_value[label_name] = label_value
lbl = shapes_to_label(img.shape, shapes, label_name_to_value)
self._mapPiecesToJson(cateName,lbl)
# lblsave(r'.\labelme_temp\%s_label_%s.png' % (self.objName,cateName), lbl)
def _mapPiecesToJson(self,cate,img):
""" 4th 讀取label_png圖片 分割 並將每塊 對映到對應的sub json"""
def generateNewShape(labelName,pointSet):
"""生成新的字典 方便json新增到shapes列表"""
res = dict()
res['label'] = labelName
res['line_color'] = None
res['fill_color'] = None
res['points'] = pointSet
res['shape_type'] = 'polygon'
return res
# img = cv2.imread(r'.\labelme_temp\%s_label_%s.png' % (self.objName,cate),0)
img = np.uint8(img)
#橫豎兩道槓
img[:, self.half_w - 2: self.half_w + 3] = 0
img[self.half_h - 2:self.half_h + 3, :] = 0
#找到輪廓並擬合
contours, _ = cv2.findContours(img, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
aprox = [cv2.approxPolyDP(c, 1, True) for c in contours]
aprox = [a.reshape(-1,2) for a in aprox if len(a)>=3] #過濾掉長度不符合規範的點 並reshape gzj
aprox = [a.reshape(-1, 2) for a in aprox ] #
#aprox = [a for a in aprox if (np.std(a,axis=0) > 2).all() ] #過濾掉 噪聲點 （糾結在一團的小塊）gzj
for pointSet in aprox:
#任意取出一點 作為判斷 在哪個象限標註
judgeX = pointSet[0,0]
judgeY = pointSet[0,1]
if judgeX < self.half_w and judgeY < self.half_h:
order = 0
elif judgeX > self.half_w and judgeY < self.half_h:
order = 1
elif judgeX < self.half_w and judgeY > self.half_h:
order = 2
elif judgeX > self.half_w and judgeY > self.half_h:
order = 3
#減去偏移量
pointSet -= self.disp[order]
#寫入json
self.sub_json_list[order]\
['shapes'].append(generateNewShape(cate,pointSet.tolist()))
# os.remove(r'.\labelme_temp\%s_label_%s.png'% (self.objName,cate))
def saveSubJson(self):
'''最後將所有json儲存'''
for i in range(1,5):
with open(r'.\target\%s_%i.json' %(self.objName,i), 'w') as f:
json.dump(self.sub_json_list[i-1], f)
def mission(file):
file = file.replace('JPG', 'jpg')
imgToSplit(file)
if __name__ == '__main__':
# mission = imgToSplit('DJI_0301.jpg')
# mission.splitImage()
# mission.gen_4sub_json()
# mission.confirmNewPoints()
# mission.saveSubJson()
#存放目標圖片
if not os.path.exists(r'.\target'):
os.mkdir(r'.\target')
imgFiles = [ f for f in os.listdir('.') if 'jpg' in f or 'JPG' in f]
# for file in imgFiles:
# file = file.replace('JPG','jpg')
# imgToSplit(file)
pool = Pool(processes=4)
pool.map(mission,imgFiles)
print('done!')
點選檢視程式碼
import json
import io
import base64
import numpy as np
from PIL import Image
from PIL import ImageDraw
import PIL
import math
import os.path as osp
def label_colormap(N=256):
def bitget(byteval, idx):
return ((byteval & (1 << idx)) != 0)
cmap = np.zeros((N, 3))
for i in range(0, N):
id = i
r, g, b = 0, 0, 0
for j in range(0, 8):
r = np.bitwise_or(r, (bitget(id, 0) << 7 - j))
g = np.bitwise_or(g, (bitget(id, 1) << 7 - j))
b = np.bitwise_or(b, (bitget(id, 2) << 7 - j))
id = (id >> 3)
cmap[i, 0] = r
cmap[i, 1] = g
cmap[i, 2] = b
cmap = cmap.astype(np.float32) / 255
return cmap
def lblsave(filename, lbl):
if osp.splitext(filename)[1] != '.png':
filename += '.png'
# Assume label ranses [-1, 254] for int32,
# and [0, 255] for uint8 as VOC.
if lbl.min() >= -1 and lbl.max() < 255:
lbl_pil = PIL.Image.fromarray(lbl.astype(np.uint8), mode='P')
colormap = label_colormap(255)
lbl_pil.putpalette((colormap * 255).astype(np.uint8).flatten())
lbl_pil.save(filename)
else:
print(
'[%s] Cannot save the pixel-wise class label as PNG, '
'so please use the npy file.' % filename
)
def img_b64_to_arr(img_b64):
f = io.BytesIO()
f.write(base64.b64decode(img_b64))
img_arr = np.array(Image.open(f))
return img_arr
def shape_to_mask(img_shape, points, shape_type=None,
line_width=10, point_size=5):
mask = np.zeros(img_shape[:2], dtype=np.uint8)
mask = Image.fromarray(mask)
draw = ImageDraw.Draw(mask)
xy = [tuple(point) for point in points]
if shape_type == 'circle':
assert len(xy) == 2, 'Shape of shape_type=circle must have 2 points'
(cx, cy), (px, py) = xy
d = math.sqrt((cx - px) ** 2 + (cy - py) ** 2)
draw.ellipse([cx - d, cy - d, cx + d, cy + d], outline=1, fill=1)
elif shape_type == 'rectangle':
assert len(xy) == 2, 'Shape of shape_type=rectangle must have 2 points'
draw.rectangle(xy, outline=1, fill=1)
elif shape_type == 'line':
assert len(xy) == 2, 'Shape of shape_type=line must have 2 points'
draw.line(xy=xy, fill=1, width=line_width)
elif shape_type == 'linestrip':
draw.line(xy=xy, fill=1, width=line_width)
elif shape_type == 'point':
assert len(xy) == 1, 'Shape of shape_type=point must have 1 points'
cx, cy = xy[0]
r = point_size
draw.ellipse([cx - r, cy - r, cx + r, cy + r], outline=1, fill=1)
else:
assert len(xy) > 2, 'Polygon must have points more than 2'
draw.polygon(xy=xy, outline=1, fill=1)
mask = np.array(mask, dtype=bool)
return mask
def shapes_to_label(img_shape, shapes, label_name_to_value, type='class'):
assert type in ['class', 'instance']
cls = np.zeros(img_shape[:2], dtype=np.int32)
if type == 'instance':
ins = np.zeros(img_shape[:2], dtype=np.int32)
instance_names = ['_background_']
for shape in shapes:
points = shape['points']
label = shape['label']
shape_type = shape.get('shape_type', None)
if type == 'class':
cls_name = label
elif type == 'instance':
cls_name = label.split('-')[0]
if label not in instance_names:
instance_names.append(label)
ins_id = len(instance_names) - 1
cls_id = label_name_to_value[cls_name]
mask = shape_to_mask(img_shape[:2], points, shape_type)
cls[mask] = cls_id
if type == 'instance':
ins[mask] = ins_id
if type == 'instance':
return cls, ins
return cls
def pointsDivByLabel(listOfDict):
"""傳入data['shapes'] 用label 將各個類分開"""
res = dict()
for shape in listOfDict:
if shape['label'] in res.keys():
res[shape['label']].append(shape)
else:
res[shape['label']] = [shape]
return res
# def justDrawLabel(file):
# obj = file.strip('.json')
#
# with open(file,'r') as f:
# data = json.load(f)
#
# imgData = data['imageData']
#
# img = img_b64_to_arr(imgData)
#
# categories = pointsDivByLabel(data['shapes'])
# for cateName,shapes in categories.items():
# label_name_to_value = {'_background_': 0}
#
# for shape in sorted(shapes, key=lambda x: x['label']):
# label_name = shape['label']
# if label_name in label_name_to_value:
# label_value = label_name_to_value[label_name]
# else:
# label_value = len(label_name_to_value)
# label_name_to_value[label_name] = label_value
#
# lbl = shapes_to_label(img.shape, shapes, label_name_to_value)
# lblsave('label_%s.png'%cateName, lbl)
if __name__ == '__main__':
# justDrawLabel('test4.json')
pass