python opencv去图片水印（图片底色为白色）
Python
# -*- coding: utf-8 -*-
import cv2,os,shutil,datetime,re,time
from threading import Thread
from hashlib import md5
PICHASH= {}
def md5_file(name):
try:
m = md5()
a_file = open(name, 'rb')
m.update(a_file.read())
a_file.close()
return m.hexdigest()
except:
return None
def nowater(dir,newdir,dirlist):
global PICHASH
for ppicdir in dirlist:
print ppicdir
print os.path.isdir(dir+ppicdir)
if(os.path.isdir(dir+ppicdir)):
sortfiles=os.listdir(dir+ppicdir)
if '.DS_Store' in sortfiles:
sortfiles.remove('.DS_Store')
sortfiles.sort()
for oldfile in sortfiles:
filetype="."+oldfile.split(".")[len(oldfile.split("."))-1]
picname_front=oldfile.split(filetype)[0]
oldfile=dir+ppicdir+"/"+oldfile
jpgname=picname_front+".jpg"
jpgname=newdir+ppicdir+"/"+jpgname
try:
oldfile_hash=md5_file(oldfile)
oldfile_tmphashvalue=PICHASH.get(oldfile_hash)
file_object = open('pichash.txt', 'a')
file_object.write(oldfile+":"+oldfile_hash+'\n')
file_object.close()
if(oldfile_tmphashvalue==None):
if not os.path.exists(newdir+ppicdir):
os.makedirs(newdir+ppicdir)
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+oldfile+",ing\n"
img=cv2.imread(oldfile)
x,y,z=img.shape
if x < 100:
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+jpgname+"too small , continue"
elif x >5000:
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+jpgname+"too big , continue"
elif not os.path.exists(jpgname):
for i in xrange(x):
for j in xrange(y):
varP=img[i,j]
if sum(varP)>250 and sum(varP)<765 :
img[i,j]=[255,255,255]
cv2.imwrite(jpgname,img)
print "jpgname:"+jpgname
PICHASH[oldfile_hash]=oldfile
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+oldfile+",done\n"
else:
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+jpgname+"exists\n"
elif(oldfile_tmphashvalue!=None):
if(os.path.exists(jpgname)):
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+jpgname+"exists\n"
else:
shutil.copyfile(oldfile_tmphashvalue,oldfile)
shutil.copyfile(oldfile,jpgname)
print datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")+","+jpgname+" same with the old, continue"
except Exception,e:
print "Exception:",e
continue
if __name__=='__main__':
dir="./pic/"
newdir="./picnew/"
list0=[]
list1=[]
list2=[]
for ppicdir in os.listdir(dir) :
print ppicdir
print os.path.isdir(dir+ppicdir)
if(os.path.isdir(dir+ppicdir)):
if (re.compile(r'^[0-1].*').match(str(ppicdir))):
list0.append(ppicdir)
elif(re.compile(r'^[2-3].*').match(str(ppicdir))):
list1.append(ppicdir)
elif(re.compile(r'^[4-5].*').match(str(ppicdir))):
list2.append(ppicdir)
else:
continue
Thread(target=nowater,args=(dir,newdir,list0)).start()
Thread(target=nowater,args=(dir,newdir,list1,)).start()
Thread(target=nowater,args=(dir,newdir,list2,)).start()