python判断获取一张图片主色调的2个实例.doc

python判断获取一张图片主色调的2个实例
python判断、获取一张图片主色调的2个实例
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一幅图片，想通过程序判断获得其主要色调，应该怎么样处理？本文通过python实现判断、获取一张图片的主色调方法,需要的朋友可以参考下
python判断图片主色调，单个颜色：
复制代码 代码如下:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import colorsys
from PIL import Image
import optparse
def get_dominant_color(image):
"""
Find a PIL image's dominant color, returning an (r, g, b) tuple.
"""
image = ('RGBA')
# Shrink the image, so we don't spend too long analysing color
# frequencies. We're not interpolating so should be quick.
((200, 200))
max_score = None
dominant_color = None
for count, (r, g, b, a) in ([0] * [1]):
# Skip 100% transparent pixels
if a == 0:
continue
# Get color saturation, 0-1
saturation = (r / , g / , b / )[1]
# Calculate luminance - integer YUV conversion from
#
y = min(abs(r * 2104 + g * 4130 + b * 802 + 4096 + 131072) >> 13, 235)
# Rescale luminance from 16-235 to 0-1
y = (y - ) / (235 - 16)
# Ignore the brightest colors
if y > :
continue
# Calculate the score, preferring highly saturated colors.
# Add to the saturation so we don't completely ignore grayscale
# colors by multiplying the count by zero, but still give them a low
# weight.
score = (saturation + ) * count
if score