在python中渲染图像时的抗锯齿是什么? [英] What is anti-aliasing in rendering an image in python?

问题描述

什么是抗锯齿?当我使用 pygame 模块渲染图像时，它要求抗锯齿的文本之后，所以我想知道它是什么?

解决方案

最简单的解释方式

如您所见，抗锯齿减少了锯齿，并创建了更平滑"的画面.看.这是通过将文本边缘的像素与背景混合来实现的.锯齿并非完全不透明，而是部分透明.

示例代码:

导入pygamepygame.init()窗口 = pygame.display.set_mode((500, 150))时钟 = pygame.time.Clock()font = pygame.font.SysFont(None, 100)#text = font.render('Hello World', False, (255, 0, 0))text = font.render('Hello World', True, (255, 0, 0))背景 = pygame.Surface(window.get_size())ts, w, h, c1, c2 = 50, *window.get_size(), (128, 128, 128), (64, 64, 64)瓷砖 = [((x*ts, y*ts, ts, ts), c1 if (x+y) % 2 == 0 else c2) for x in range((w+ts-1)//ts) fory 在范围内((h+ts-1)//ts)]对于矩形，瓷砖中的颜色:pygame.draw.rect(背景，颜色，矩形)运行 = 真运行时:时钟滴答(60)对于 pygame.event.get() 中的事件:如果 event.type == pygame.QUIT:运行 = 错误window.blit(背景, (0, 0))window.blit(text, text.get_rect(center = window.get_rect().center))pygame.display.flip()pygame.quit()出口()

What is anti-aliasing? When I render an image with pygame module the after the text it asks for anti-aliasing, so i wanted to know what it is?

解决方案

The easiest way to explain Anti-aliasing is to show the difference between anti aliasing on and off.
Compare text rendering with and without anti-aliasing:

As you can see, anti-aliasing has reduced the jaggedness and created a "smoother" look. This is achieved by blending the pixels on the edge of the text with the background. The jaggs are not completely opaque, but are partially transparent.

Example code:

import pygame

pygame.init()
window = pygame.display.set_mode((500, 150))
clock = pygame.time.Clock()

font = pygame.font.SysFont(None, 100)
#text = font.render('Hello World', False, (255, 0, 0))
text = font.render('Hello World', True, (255, 0, 0))

background = pygame.Surface(window.get_size())
ts, w, h, c1, c2 = 50, *window.get_size(), (128, 128, 128), (64, 64, 64)
tiles = [((x*ts, y*ts, ts, ts), c1 if (x+y) % 2 == 0 else c2) for x in range((w+ts-1)//ts) for y in range((h+ts-1)//ts)]
for rect, color in tiles:
    pygame.draw.rect(background, color, rect)

run = True
while run:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    window.blit(background, (0, 0))
    window.blit(text, text.get_rect(center = window.get_rect().center))
    pygame.display.flip()

pygame.quit()
exit()

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