python字元畫

园糯發表於2024-08-31
Python字元
from PIL import Image
import argparse

#命令列輸入引數處理
parser = argparse.ArgumentParser()

parser.add_argument('file')     #輸入檔案
parser.add_argument('-o', '--output')   #輸出檔案
parser.add_argument('--width', type = int, default = 80) #輸出字元畫寬
parser.add_argument('--height', type = int, default = 80) #輸出字元畫高

#獲取引數
args = parser.parse_args()

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

def strB2Q(ustring):
    """半形轉全形"""
    rstring = ""
    for uchar in ustring:
        inside_code=ord(uchar)
        if inside_code == 32:                                 #半形空格直接轉化                 
            inside_code = 12288
        elif inside_code >= 32 and inside_code <= 126:        #半形字元（除空格）根據關係轉化
            inside_code += 65248
 
        rstring += chr(inside_code)
    return rstring

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


# 將256灰度對映到70個字元上
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)     
    #因為70個字元的陣列下標範圍是從0到69，如果不加1，灰度為256時會取下標為70，此時超出陣列範圍
    unit = (256.0 + 1)/length     
    return ascii_char[int(gray/unit)]

if __name__ == '__main__':
    #載入IMG的檔案
    im = Image.open(IMG) 
    #重置或預設值 
    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):
            #返回指定位置的畫素
            txt += get_char(*im.getpixel((j,i)))   
        txt += '\n'

    print(txt)

    #字元畫輸出到檔案
    if OUTPUT:
        with open(OUTPUT,'w') as f:
            f.write(txt)
    else:
        with open("output.txt",'w') as f:
            f.write(txt)

參考連結：圖片轉字元畫 https://gitee.com/wangyufu/python-ASCII-Generator/blob/master/ascii.py
Python 圖片轉字元畫 https://www.cnblogs.com/wangyufu/p/5602848.html

from PIL import Image
import numpy as np

# 定義字符集，從暗到亮
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是為了補償字元高度
    resized_image = image.resize((new_width, new_height))
    return resized_image

def grayify(image):
    return image.convert("L")  # 轉換為灰度圖

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]  # 將畫素值對映到字符集
    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 = ""

    # 將長字串分割為行
    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"  # 替換為你的圖片路徑
    ascii_image = convert_image_to_ascii(image_path, new_width=100)
    print(ascii_image)

    # 如果需要將結果儲存到檔案中
    with open("ascii_image.txt", "w") as f:
        f.write(ascii_image)

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