Pygame，从二维 numpy 数组创建灰度 [英] Pygame, create grayscale from 2d numpy array

问题描述

Python 3.4，pygame==1.9.2b8

Python 3.4, pygame==1.9.2b8

我想绘制灰度框架.现在，下面的代码生成蓝色，但我想在 (0,255) 范围内生成颜色，其中 0 - 黑色.255 - 白色.怎么可能?！

I want to draw grayscale frame. Now, code below produce blue color, but I want to make color in range (0,255), where 0 - black. 255 -white. How is it possible?!

import pygame 
import numpy as np
s = 300
screen = pygame.display.set_mode((s, s))
screenarray = np.zeros((s,s))
screenarray.fill(200)
pygame.surfarray.blit_array(screen, screenarray)
pygame.display.flip()
input()

• 事实上，我有更复杂的screenarray，其中每个元素位于 (0,65535) 期间.所以我想把它转换成灰度.
• in fact I have more complex screenarray, where each element lie during (0,65535). So I want to convert It to grayscale.

非常感谢.

推荐答案

PyGame 使用 24 位颜色作为三个字节 (R,G,B) 所以白色是 (0,0,0)，黑色是 (255,255,255)

PyGame use 24-bit colors as three bytes (R,G,B) so white is (0,0,0) and black is (255,255,255)

import pygame 
import numpy as np

SIZE = 256

pygame.init()
screen = pygame.display.set_mode((SIZE, SIZE))

screenarray = np.zeros((SIZE, SIZE, 3))

for x in range(SIZE):
    screenarray[x].fill(x)

pygame.surfarray.blit_array(screen, screenarray)

pygame.display.flip()

input()

pygame.quit()

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