Historigram.py 文件源码

def historigram(filename):

    values = {}
    mostpixels = []

    im = Image.open(filename)
    im = im.convert("P")
    his = im.histogram()

    for i in range(256):
        values[i] = his[i]

    print('Id ' + 'Number of pixels')

    for j,k in sorted(values.items(), key=itemgetter(1), reverse=True)[:10]:
        print(j,k)
        mostpixels.append([j,k])

    return mostpixels