Question

我正在编写覆盖图像并使背景透明的脚本。输出应该是GIF格式。

该脚本可以工作，但是对于某些图像，透明度不能按预期工作。

这是脚本

from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont

CANVAS_HEIGHT = 354
CANVAS_WIDTH = 344


def get_text_mask():
    font_style_path = 'Ultra-Regular.ttf'

    text_mask_base = Image.new('L', (CANVAS_WIDTH, CANVAS_HEIGHT), 255)
    text_mask = text_mask_base.copy()
    text_mask_draw = ImageDraw.Draw(text_mask)
    font = ImageFont.truetype(font_style_path, 94)
    text_mask_width, text_mask_height = text_mask_draw.multiline_textsize("1000\nUsers",
                                                                          font=font)

    text_mask_draw.multiline_text(((CANVAS_WIDTH - text_mask_width) / 2,
                                   (CANVAS_HEIGHT - text_mask_height) / 2),
                                  "1000\nUsers",
                                  font=font,
                                  fill=0,
                                  align='center')

    return text_mask


def run():
    images = ['image1.png', 'image2.png']
    for index, original_image in enumerate(images):
        image = Image.open(original_image)
        blank_canvas = Image.new('RGBA', (CANVAS_WIDTH, CANVAS_HEIGHT), (255, 255, 255, 0))
        text_mask = get_text_mask()
        final_canvas = blank_canvas.copy()
        for i in xrange(0, CANVAS_WIDTH, image.width):
            for j in xrange(0, CANVAS_HEIGHT, image.height):
                final_canvas.paste(image, (i, j))

        final_canvas.paste(text_mask, mask=text_mask)
        final_canvas.convert('P', palette=Image.ADAPTIVE)
        final_canvas.save("output-{}.gif".format(index), format="GIF", transparency=0)

run()

image1.png