#使用Image包合成图片 添加文字。 下面将通过实例介绍利用py PIL包对图片进行合成，裁减以及添加文字。 ##原始图片4张

##合成后图片：

#图片处理 ##图片拼接

# 创建空白图片

target = Image.new('RGBA', (width, hight+504), (255, 255, 255))

# 创建header Image对象，paste拼接到空白图片指定位置target.paste(img_h, (0, 0))

img_h = img_header(os.path.join(tasktheme_img_path, task_img))

# 图片合成paste 参数中img_h表示Image对象，(0, 0)表示x,y轴位置 单位像素 target的左上角为原点 y轴向下

target.paste(img_h, (0, 0))

##生成圆形图片 因为头像图片为方形，需要裁减成圆形图片然后拼接。 裁减的原理是在正方形中画出一个内切圆，四个角的像素为对应背景位置的像素 裁减的圆形图片四个角的图片需对应到背景图

# 因为是要圆形，所以需要正方形的图片

r2 = min(size[0], size[1])

if size[0] != size[1]:

ima = ima.resize((r2, r2), Image.ANTIALIAS)

# 最后生成圆的半径

r3 = r2/2

imb = Image.new('RGBA', (r3*2, r3*2),(255,255,255,0))

pima = ima.load() # 像素的访问对象

pimb = imb.load()

pim_back = img_back.load()

r = float(r2/2) #圆心横坐标

for i in range(r2):

for j in range(r2):

lx = abs(i-r) #到圆心距离的横坐标

ly = abs(j-r)#到圆心距离的纵坐标

l = (pow(lx,2) + pow(ly,2))** 0.5 # 三角函数 半径

if l < r3-4:

pimb[i-(r-r3),j-(r-r3)] = pima[i,j]

elif l > r3:

# 大于半径的像素为背景图位置对应的像素，这样显示圆形头像四个角才能正常显示，pim_back为背景image对象

pimb[i-(r-r3),j-(r-r3)] = pim_back[i+35,j+327-50]

return imb

##添加文字，线条 在linux上需要导入支持中文的simsun.ttc字库，否则会乱码 draw.text指定位置开始添加文字 draw.line指定位置开始画线

font = ImageFont.truetype(os.path.join(os.getcwd(),'data','simsun.ttc'),26)

text = u'长按小程序码'

draw.text((457, hight+331), text,fill='#999',font=font)

text = u'立即阅读文章详情'

draw.text((457, hight+366), text,fill='#999',font=font)

draw.line((10, hight+251, width-10, hight+251), fill='#eee')

#完整代码

from PIL import Image,ImageFont,ImageDraw

reload(sys)

sys.setdefaultencoding('utf8')

def img_author(fpath, img_back):

ima = Image.open(fpath).convert("RGBA")

ima = ima.resize((130, 130), Image.ANTIALIAS)

size = ima.size

# 因为是要圆形，所以需要正方形的图片

r2 = min(size[0], size[1])

if size[0] != size[1]:

ima = ima.resize((r2, r2), Image.ANTIALIAS)

# 最后生成圆的半径

r3 = r2/2

imb = Image.new('RGBA', (r3*2, r3*2),(255,255,255,0))

pima = ima.load() # 像素的访问对象

pimb = imb.load()

pim_back = img_back.load()

r = float(r2/2) #圆心横坐标

for i in range(r2):

for j in range(r2):

lx = abs(i-r) #到圆心距离的横坐标

ly = abs(j-r)#到圆心距离的纵坐标

l = (pow(lx,2) + pow(ly,2))** 0.5 # 三角函数 半径

if l < r3-4:

pimb[i-(r-r3),j-(r-r3)] = pima[i,j]

elif l > r3:

pimb[i-(r-r3),j-(r-r3)] = pim_back[i+35,j+327-50]

return imb

def img_header(fpath):

img = Image.open(fpath)

img = img.resize((718,327))

img = img.convert("RGBA")

return img

def img_logo(fpath):

img = Image.open(fpath)

img = img.resize((160,160))

im = Image.new('RGBA', img.size, (255,255,255))

x,y = img.size

im.paste(img, (0, 0, x, y), img)

return im

def img_applicationcode(fpath):

img = Image.open(fpath)

img = img.resize((180,180))

img = img.convert("RGBA")

return img

def wx_get_share_img(data):

task_img = data['task_img']

author_img = data['author_img']

author_name = data['author_name']

task_name = data['task_name']

roud_name = data['roud_name']

aid = data['aid']

tid = data['tid']

width = 718

hight = 327

save_name = str(aid)+'.jpg'

if os.path.exists(os.path.join(wx_share_path,save_name)):

return {'img':wx_share_url+save_name}

try:

target = Image.new('RGBA', (width, hight+504), (255, 255, 255))

img_h = img_header(os.path.join(tasktheme_img_path, task_img))

target.paste(img_h, (0, 0))

img_a = img_author(os.path.join(avatar_img_path, author_img),target)

target.paste(img_a, (35, hight-50))

img_l = img_logo(os.path.join(img_dir,'logo.png'))

target.paste(img_l, (30,hight+296))

# 获取动态小程序码

#img_l = img_applicationcode(os.path.join(img_dir,'applicationcode.jpg'))

img_l = miniprogram.getCodeUnlimit('aid=%s&tid=%s'%(aid,tid),'pages/index/story_detail/story_detail')

img_l = img_l.resize((160,160))

target.paste(img_l, (30+160+40,hight+296))

draw = ImageDraw.Draw(target)

font = ImageFont.truetype(os.path.join(os.getcwd(),'data','simsun.ttc'),32)

draw.text((30+130+15, hight+34), author_name.decode('utf-8'),fill='#009696',font=font)

font = ImageFont.truetype(os.path.join(os.getcwd(),'data','simsun.ttc'),34)

draw.text((30, hight+125), task_name.decode('utf-8'),fill='#000000',font=font)

font = ImageFont.truetype(os.path.join(os.getcwd(),'data','simsun.ttc'),30)

draw.text((30, hight+176), roud_name.decode('utf-8'),fill='#555',font=font)

font = ImageFont.truetype(os.path.join(os.getcwd(),'data','simsun.ttc'),26)

text = u'长按小程序码'

draw.text((457, hight+331), text,fill='#999',font=font)

text = u'立即阅读文章详情'

draw.text((457, hight+366), text,fill='#999',font=font)

draw.line((10, hight+251, width-10, hight+251), fill='#eee')

# print help(draw)

target = target.convert("RGB")

target.save(os.path.join(wx_share_path, save_name))

return {'img':wx_share_url+save_name}

except Exception as e:

traceback.print_exc()

return {}