Why has the problem is it?
1, network problems: the network is unstable, the received information is not a complete picture. That response in question;
2, local disk is full: sometimes received picture information is complete, but save any local disk, after all, have a picture of it several Mb.
How to detect errors pictures?
Tried so many ways, a better approach is to determine the identity jpg, jpeg, png file ending.
JPG file ending identifies: \ xFF \ xd9
JPEG file ending identifies: \ xFF \ xd9
PNG file ending identifies: \ xaeB` \ x82
detect incomplete picture Code
class CheckImage(object):
def __init__(self, img):
with open(img, "rb") as f:
f.seek(-2, 2)
self.img_text = f.read()
f.close()
check_jpg_jpeg DEF (Self):
"" "detection jpg image integrity, complete returns True, incomplete returns False" ""
buf = self.img_text
return buf.endswith (b '\ xFF \ xd9')
check_png DEF (Self):
"" "detection png image integrity, complete returns True, incomplete returns False" ""
buf = self.img_text
return buf.endswith(b'\xaeB`\x82')
Detect a folder without the full picture, and delete
import os
from CheckImage import CheckImage
class CheckBrockImage(object):
def __init__(self, train_dir):
self.train_dir = train_dir
self.completeFile = 0
self.incompleteFile = 0
get_imgs DEF (Self):
"" "through all the pictures in a folder" ""
for File in os.listdir (self.train_dir):
IF os.path.splitext (File) [1] .lower () = = '.jpg' or os.path.splitext (File) [. 1] .lower () == ".jpeg":
RET = self.check_img (File)
IF RET:
self.completeFile +. 1 =
the else:
self.incompleteFile self.incompleteFile + = 1
# self.img_remove (File) # delete incomplete picture
def img_remove(self, file):
"""删除图片"""
os.remove(self.train_dir + file)
check_img DEF (Self, img_file):
"" "detect the integrity of the picture, the picture complete returns True, the picture is incomplete returns False" ""
return checkImage (self.train_dir + img_file) .check_jpg_jpeg ()
RUN DEF (Self):
"" "executable file" ""
self.get_imgs ()
Print ( 'incomplete picture:% d months'% self.incompleteFile)
Print ( 'the complete picture:% d months'% self.completeFile)
the __name__ == IF '__main__':
train_dir = 'C: / the Users / 79993 / Desktop / BrockImg / TextImg /' # detection folder
imgs = CheckBrockImage (train_dir)
imgs.run ()
Skip incomplete picture jpg
with open(os.path.join(path, filename), 'rb') as f:
check_chars = f.read()[-2:]
if check_chars != b'\xff\xd9':
continue
else:
img = cv2.imread(os.path.join(path, filename), 1)
