① '求助'python怎么判断图片是否为灰度图
这里判断是否为灰度图的标准是：每一个像素所对应的R、G、B的值是否相等。
def is_color_image(url):
im=Image.open(url)
pix=im.convert('RGB')
width=im.size[0]
height=im.size[1]
oimage_color_type="Grey Image"
is_color=[]
for x in range(width):
for y in range(height):
r,g,b=pix.getpixel((x,y))
r=int(r)
g=int(g)
b=int(b)
if (r==g) and (g==b):
pass
else:
oimage_color_type='Color Image'
return oimage_color_type
② 如何使用python来判断图片相似度
from PIL import Imageimport os#import hashlib def getGray(image_file): tmpls=[] for h in range(0, image_file.size[1]):#h for w in range(0, image_file.size[0]):#w tmpls.append( image_file.getpixel((w,h)) ) return tmpls def getAvg(ls):#获取平均灰度值 return sum(ls)/len(ls) def getMH(a,b):#比较100个字符有几个字符相同 dist = 0; for i in range(0,len(a)): if a[i]==b[i]: dist=dist+1 return dist def getImgHash(fne): image_file = Image.open(fne) # 打开 image_file=image_file.resize((12, 12))#重置图片大小我12px X 12px image_file=image_file.convert("L")#转256灰度图 Grayls=getGray(image_file)#灰度集合 avg=getAvg(Grayls)#灰度平均值 bitls=''#接收获取0或1 #除去变宽1px遍历像素 for h in range(1, image_file.size[1]-1):#h for w in range(1, image_file.size[0]-1):#w if image_file.getpixel((w,h))>=avg:#像素的值比较平均值 大于记为1 小于记为0 bitls=bitls+'1' else: bitls=bitls+'0' return bitls''' m2 = hashlib.md5() m2.update(bitls) print m2.hexdigest(),bitls return m2.hexdigest()''' a=getImgHash("./Test/测试图片.jpg")#图片地址自行替换files = os.listdir("./Test")#图片文件夹地址自行替换for file in files: b=getImgHash("./Test/"+str(file)) compare=getMH(a,b) print file,u'相似度',str(compare)+'%'