from PIL import Image
import os
src_folder = "."
tar_folder = "tar"
backup_folder = "backup"
def isCrust(pix):
return sum(pix) < 25
def hCheck(img, y, step = 50):
count = 0
width = img.size[0]
for x in xrange(0, width, step):
if isCrust(img.getpixel((x, y))):
count += 1
if count > width / step / 2:
return True
return False
def vCheck(img, x, step = 50):
count = 0
height = img.size[1]
for y in xrange(0, height, step):
if isCrust(img.getpixel((x, y))):
count += 1
if count > height / step / 2:
return True
return False
def boundaryFinder(img,crust_side,core_side,checker):
if not checker(img,crust_side):
return crust_side
if checker(img,core_side):
return core_side
mid = (crust_side + core_side) / 2
while mid != core_side and mid != crust_side:
if checker(img,mid):
crust_side = mid
else:
core_side = mid
mid = (crust_side + core_side) / 2
return core_side
pass
def handleImage(filename,tar):
img = Image.open(os.path.join(src_folder,filename))
if img.mode != "RGB":
img = img.convert("RGB")
width, height = img.size
left = boundaryFinder(img, 0, width/2, vCheck)
right = boundaryFinder(img, width-1, width/2, vCheck)
top = boundaryFinder(img, 0, height/2, hCheck)
bottom = boundaryFinder(img, height-1, width/2, hCheck)
rect = (left,top,right,bottom)
print rect
region = img.crop(rect)
region.save(os.path.join(tar,filename),'PNG')
pass
def folderCheck(foldername):
if foldername:
if not os.path.exists(foldername):
os.mkdir(foldername)
print "Info: Folder \"%s\" created" % foldername
elif not os.path.isdir(foldername):
print "Error: Folder \"%s\" conflict" % foldername
return False
return True
pass
def main():
if folderCheck(tar_folder) and folderCheck(src_folder) and folderCheck(backup_folder):
for filename in os.listdir(src_folder):
if filename.split('.')[-1].upper() in ("JPG","JPEG","PNG","BMP","GIF"):
handleImage(filename,tar_folder)
os.rename(os.path.join(src_folder,filename),os.path.join(backup_folder,filename))
pass
if __name__ == '__main__':
main()
#handleImage('Screenshot_2013-10-13-21-55-14.png','')
代码作用是 遍历当前文件夹下的所有JPG PNG BMP GIF文件，找到内容上下左右的边距（实际上是内容矩形左上右下两点的坐标），将切出来的图片保存到目标文件夹中，并备份源文件到备份文件夹中。