黑色图像分割

Question

我正在尝试裁剪图像，因此图像有黑色，上面有一些项目，我想裁剪包含这些项目的黑色背景并删除其余部分，我尝试使用此代码但无法实现此目的，请帮助我这个

import sys
from PIL import Image, ImageFilter
from path import Path
imgPath = Path(sys.argv[1])
print imgPath, imgPath.basename()
img = Image.open(imgPath)
contourImg = img.filter(ImageFilter.CONTOUR)
binaryImg = contourImg.convert("1")
rows, cols = binaryImg.size

imgData = binaryImg.load()
edgeDataX = []
edgeDataY = []

print "Image size = (%d,%d)" % (rows, cols)

for x in xrange(rows):
    for y in xrange(cols):
        if imgData[x,y] == 255:
            edgeDataX.append(x)
            edgeDataY.append(y)

print "\nEdge Points of cropped image: "

print (max(edgeDataX), min(edgeDataY)), (max(edgeDataX), max(edgeDataY))
print "croppig image.."

croppedImg = img.crop((min(edgeDataX), min(edgeDataY), max(edgeDataX), max(edgeDataY)))
croppedImgPath = imgPath.dirname() / imgPath.namebase + "_cropped.jpg"
print "\nCropped Image saved at : " + croppedImgPath
croppedImg.save(croppedImgPath)

croppedImg.show()