二、答题步骤

1.提取图片二维码

调节文件位置后用画图拼接，并将有数字的格涂黑。

from PIL import Image
path = input("输入图片路径")
img0 = Image.new("RGBA", (180, 180), "white")
box0 = (3, 3, 199, 199)
for i in range(45):
    for j in range(45):
        pngnum = i // 9 * 5 + j // 9 + 1
        img1 = Image.open(path + "\\" + str(pngnum) + ".png")
        box = ((j % 9) * 22 + 11, (i % 9) * 22 + 11, (j % 9) * 22 + 18, (i % 9) * 22 + 18)
        img2 = img1.crop(box0).crop(box).load()
        sign = False
        for x in range(7):
            for y in range(7):
                if img2[x, y] != (255, 255, 255, 255):
                    sign = True
                    break
            if sign:
                break
        if sign:
            for x in range(4):
                for y in range(4):
                    img0.putpixel([i * 4 + x, j * 4 + y], (0, 0, 0))
img0.save(path + "\\" + "result.png")

得到二维码

扫码得到

Vm0xd1NtUXlWa1pPVldoVFlUSlNjRlJVVGtOamJGWnlWMjFHVlUxV1ZqTldNakZIWVcxS1IxTnNhRmhoTVZweVdWUkdXbVZHWkhOWGJGcHBWa1paZWxaclpEUmhNVXBYVW14V2FHVnFRVGs9

2.base64

进行7次base64解码

得到flag：flag{y0ud1any1s1}

总结

• 二维码
• base64