python PIL Image basic image stitching, round cut, add text

Image package using synthetic images to add text.

We will now be described by way of example using the picture packet py PIL synthesis, reduction, and add text.

Original Picture 4

After synthesis picture:

Image processing

Image stitching

# 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))

Generating circular picture

Because the avatar image as square, circular images need to cut and splice.
The principle is shown a cut inscribed circle in a square, the four corners of the background pixels corresponding to the pixel position
reductions circular image corresponds to the four corners of the background image for an

# 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

Add text, lines

On the need to import linux simsun.ttc Chinese font support, otherwise it will be messy
draw.text specified location to start adding text
draw.line specify the location to start drawing a line

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')

The complete code

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 {}