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Palette.py
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Palette.py
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# -*-coding:utf8 -*-
import numpy as np
import skimage.color
#import skimage.io
import cv2
class Palette(object):
"""
color palette
"""
def __init__(self, num_hues=8, sat_range=2, light_range=2, debug=False):
height = 1 + sat_range + (2 * light_range - 1)
hues = np.tile(np.linspace(0, 1, num_hues + 1)[:-1], (height, 1))
if num_hues == 8:
hues = np.tile(np.array(
[0., 0.10, 0.15, 0.28, 0.51, 0.58, 0.77, 0.85]), (height, 1))
if num_hues == 9:
hues = np.tile(np.array(
[0., 0.10, 0.15, 0.28, 0.49, 0.54, 0.60, 0.7, 0.87]), (height, 1))
if num_hues == 10:
hues = np.tile(np.array(
[0., 0.10, 0.15, 0.28, 0.49, 0.54, 0.60, 0.66, 0.76, 0.87]), (height, 1))
elif num_hues == 11:
hues = np.tile(np.array(
[0.0, 0.0833, 0.166, 0.25,
0.333, 0.5, 0.56333,
0.666, 0.73, 0.803,
0.916]), (height, 1))
sats = np.hstack((
np.linspace(0, 1, sat_range + 2)[1:-1],
1,
[1] * (light_range),
[.4] * (light_range - 1),
))
lights = np.hstack((
[1] * sat_range,
1,
np.linspace(1, 0.2, light_range + 2)[1:-1],
np.linspace(1, 0.2, light_range + 2)[1:-2],
))
sats = np.tile(np.atleast_2d(sats).T, (1, num_hues))
lights = np.tile(np.atleast_2d(lights).T, (1, num_hues))
colors = skimage.color.hsv2rgb(np.dstack((hues, sats, lights)))
grays = np.tile(
np.linspace(1, 0, height)[:, np.newaxis, np.newaxis], (1, 1, 3))
self.rgb_image = np.hstack((colors, grays))
h, w, d = colors.shape
color_array = colors.T.reshape((d, w * h)).T
h, w, d = grays.shape
gray_array = grays.T.reshape((d, w * h)).T
self.rgb_array = np.vstack((color_array, gray_array))
self.lab_array = skimage.color.rgb2lab(self.rgb_array[None, :, :]).squeeze()
if debug:
cv2.imshow('src', self.rgb_image)
cv2.waitKey()
pass
def save_img(self):
#skimage.io.imsave()
#skimage.io.imsave('palette.png', self.rgb_image)
pass
#app = Palette(debug=True)
#app.save_img()