Python简单实现图片转字符画的实例项目

gray = int(0.2126*r+0.7152*g+0.0722*b)

asciis = list('M%$@#&WNBRwm8S5A4E3KXFPH69nsxeazgpqbdoctfhkyvuGZYVTUCI2QOD0L7Jjl1ri!^{}[]()/|;:*<>_~-,. ')

pip install pillow

from PIL import Image as Image

inputfile = input('inputfile:')
outputfile = input('outputfile:')
distance = {'y':' ','':' ','n':''}
distance = distance[input('distance?(Y/n):')]
re = input("resize?:")

image = Image.open(inputfile)

w, h = image.size

nwh = re.split(',')
for i in range(len(nwh)):
    nwh[i] = int(nwh[i])

if len(nwh) == 1:
    #如果项数为1，表示用户只输入了一个数字。即按比例缩放为较长边为此长度的矩形
    ww = int(nwh[0] / max(w,h) * w) #max函数获取较大值
    hh = int(nwh[0] / max(w,h) * h)
    image = image.resize((ww,hh),Image.ANTIALIAS) 
    #改变图片大小
    #第一个参数放入一个元组，指定宽高
    #第二个参数 Image.ANTIALIAS 表示获取高质量图片
else:
    #项数不为1，缩放为指定宽高的矩形
    image = image.resize((nwh[0],nwh[1]),Image.ANTIALIAS)

asciis = list('M%$@#&WNBRwm8S5A4E3KXFPH69nsxeazgpqbdoctfhkyvuGZYVTUCI2QOD0L7Jjl1ri!^{}[]()/|;:*<>_~-,. ')
#list函数将字符串转换为列表

def getasc(r,g,b,t=100): #t为透明度
    if t == 0:
        return(' ') #如果是透明的，则直接返回空值
    else:
        asc = ''
        gray = int(0.2126*r+0.7152*g+0.0722*b) #转灰度值
        asc = asciis[int(len(asciis)/256*(gray))] #获取字符
        return(asc)

for i in range(h):
    for o in range(w): #按行读取每一个像素的RGB值
        p = image.getpixel((o,i))
        g = getasc(*p) # * 将参数列表转换为多个项
        txt = txt + g + distance #连接字符
    txt = txt + '\n' #换行

with open(outputfile,'w') as f: # 'w' 表示写入
    f.write(txt)

from PIL import Image as Image
  
asciis = list('M%$@#&WNBRwm8S5A4E3KXFPH69nsxeazgpqbdoctfhkyvuGZYVTUCI2QOD0L7Jjl1ri!^{}[]()/|;:*<>_~-,. ')
#gray = int(0.2126*r+0.7152*g+0.0722*b)

def main():
    global asciis

    print('=====image to ascii=====')
    
    inputfile, outputfile, distance, re = getargs()

    image = openfile(inputfile)

    image = resize(image,re)
    w, h = image.size

    txt = gettxt(image,w,h,distance)

    savefile(outputfile,txt)

    print('Seccessfully')

def getargs():
    inputfile = input('inputfile:\n')
    outputfile = input('outputfile:\n')
    distance = {'':' ','y':' ','n':''}
    distance = distance[input('distance?(Y/n):\n')]
    re = input("resize?(needn't:'', square:side length, restangle:width,height):\n")

    return(inputfile,outputfile,distance,re)

def openfile(inputfile):
    print("\nOpening '"+inputfile+"'...")
    image = Image.open(inputfile)

    return(image)

def resize(image,re):
    if re != '':
        print('Resizing...')
        nwh = re.split(',')
        for i in range(len(nwh)):nwh[i]=int(nwh[i])
        w, h = image.size
        
        if len(nwh) == 1:
            ww = int(nwh[0] / max(w,h) * w)
            hh = int(nwh[0] / max(w,h) * h)
            image = image.resize((ww,hh),Image.ANTIALIAS)
        else:
            image = image.resize((nwh[0],nwh[1]),Image.ANTIALIAS)
        
    return(image)

def gettxt(image,w,h,distance):    
    txt = ''
    print('Getting...')

    for i in range(h):
        for o in range(w):
            p = image.getpixel((o,i))
            txt = txt + getasc(*p) + distance
        txt = txt + '\n'

    return(txt)
    
    
def getasc(r,g,b,t=100):
    if t == 0:
        return(' ')
    else:
        asc = ''
        gray = int(0.2126*r+0.7152*g+0.0722*b)
        asc = asciis[int(len(asciis)/256*(gray))]
        return(asc)

def savefile(outputfile,txt):
    print('Saving...')
    
    with open(outputfile,'w') as f:
        f.write(txt)

    return()

if __name__ == '__main__':
    main()