python字符画

from PIL import Image
import argparse

#命令行输入参数处理
parser = argparse.ArgumentParser()

parser.add_argument('file')     #输入文件
parser.add_argument('-o', '--output')   #输出文件
parser.add_argument('--width', type = int, default = 80) #输出字符画宽
parser.add_argument('--height', type = int, default = 80) #输出字符画高

#获取参数
args = parser.parse_args()

IMG = args.file
WIDTH = args.width
HEIGHT = args.height
OUTPUT = args.output

def strB2Q(ustring):
    """半角转全角"""
    rstring = ""
    for uchar in ustring:
        inside_code=ord(uchar)
        if inside_code == 32:                                 #半角空格直接转化                 
            inside_code = 12288
        elif inside_code >= 32 and inside_code <= 126:        #半角字符（除空格）根据关系转化
            inside_code += 65248
 
        rstring += chr(inside_code)
    return rstring

ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")


# 将256灰度映射到70个字符上
def get_char(r,b,g,alpha = 256):
    # 白色返回空
    if alpha == 0:   
        return ' '
    length = len(ascii_char)
    #灰度值公式
    gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)     
    #因为70个字符的数组下标范围是从0到69，如果不加1，灰度为256时会取下标为70，此时超出数组范围
    unit = (256.0 + 1)/length     
    return ascii_char[int(gray/unit)]

if __name__ == '__main__':
    #载入IMG的文件
    im = Image.open(IMG) 
    #重置或默认值 
    HEIGHT=int(WIDTH*im.size[1]/im.size[0]*0.55)      
    im = im.resize((WIDTH,HEIGHT), Image.NEAREST)     

    txt = ""

    for i in range(HEIGHT):
        for j in range(WIDTH):
            #返回指定位置的像素
            txt += get_char(*im.getpixel((j,i)))   
        txt += '\n'

    print(txt)

    #字符画输出到文件
    if OUTPUT:
        with open(OUTPUT,'w') as f:
            f.write(txt)
    else:
        with open("output.txt",'w') as f:
            f.write(txt)

参考链接：图片转字符画 https://gitee.com/wangyufu/python-ASCII-Generator/blob/master/ascii.py
Python 图片转字符画 https://www.cnblogs.com/wangyufu/p/5602848.html

from PIL import Image
import numpy as np

# 定义字符集，从暗到亮
ASCII_CHARS = "@%#*+=-:. "

def resize_image(image, new_width=100):
    (original_width, original_height) = image.size
    aspect_ratio = original_height / float(original_width)
    new_height = int(aspect_ratio * new_width * 0.55)  # 0.55是为了补偿字符高度
    resized_image = image.resize((new_width, new_height))
    return resized_image

def grayify(image):
    return image.convert("L")  # 转换为灰度图

def pixels_to_ascii(image):
    pixels = np.array(image)
    ascii_str = ""
    for pixel_value in pixels:
        for pv in pixel_value.tolist():
            ascii_str += ASCII_CHARS[pv // 25]  # 将像素值映射到字符集
    return ascii_str

def convert_image_to_ascii(image_path, new_width=100):
    try:
        image = Image.open(image_path)
    except Exception as e:
        print(e)
        return

    image = resize_image(image, new_width)
    image = grayify(image)

    ascii_str = pixels_to_ascii(image)
    
    img_width = image.width
    ascii_str_len = len(ascii_str)
    ascii_img = ""

    # 将长字符串分割为行
    for i in range(0, ascii_str_len, img_width):
        ascii_img += ascii_str[i:i + img_width] + "\n"

    return ascii_img

# 使用示例
if __name__ == "__main__":
    image_path = "test.jpg"  # 替换为你的图片路径
    ascii_image = convert_image_to_ascii(image_path, new_width=100)
    print(ascii_image)

    # 如果需要将结果保存到文件中
    with open("ascii_image.txt", "w") as f:
        f.write(ascii_image)