Python Wand watermark()用法及代码示例

watermark()函数是Python Wand ImageMagick库中的一个内置函数，用于透明化提供的图像并将其放置在当前图像上，图像的左上角位于当前图像的左坐标处。

用法：

watermark(image, transparency, left, top)

参数：此函数接受上述和以下定义的四个参数：

Image:此参数存储要放置的图像。
Transparency:此参数存储透明度的值。取值范围是0.0到1.0。
Left:此参数存储将放置图像的x坐标的值。
Top:此参数存储将放置图像的y坐标的值。

返回值：此函数返回Wand ImageMagick对象。

原始图片：

水印图片：

范例1：

# Import library from Image  
from wand.image import Image 
  
# Import the image 
with Image(filename ='../geeksforgeeks.png') as image:
    # Import the watermark image 
    with Image(filename ='wave1.jpg') as water:
        # Clone the image in order to process 
        with image.clone() as watermark:
            # Invoke watermark function with watermark image, transparency as 0.5 
            # left as 10 and top as 20 
            watermark.watermark(water, 0.5, 10, 20) 
                # Save the image 
            watermark.save(filename ='watermark1.jpg')

输出：

范例2：

# Import libraries from the wand   
from wand.image import Image 
from wand.drawing import Drawing 
from wand.color import Color 
  
with Drawing() as draw:
    # Set Stroke color the circle to black 
    draw.stroke_color = Color('black') 
    # Set Width of the circlw to 2  
    draw.stroke_width = 1
    # Set the fill color to 'White (# FFFFFF)' 
    draw.fill_color = Color('white') 
  
    # Invoke Circle function with center at 50, 50 and radius 25 
    draw.circle((200, 200), # Center point 
                (100, 100)) # Perimeter point 
    # Set the font style 
    draw.font = '../Helvetica.ttf'
    # Set the font size  
    draw.font_size = 30
      
    with Image(width = 400, height = 400, background = Color('# 45ff33')) as pic:
        # Set the text and its location 
        draw.text(int(pic.width / 3), int(pic.height / 2), 'GeeksForGeeks !') 
        # Draw the picture 
        draw(pic) 
        # Import the watermark image 
        with Image(filename ='wave1.jpg') as water:
            # Invoke watermark function with watermark image, transparency as 0.5 
            # left as 10 and top as 20 
            pic.watermark(water, 0.5, 10, 20) 
            # Save the image  
            pic.save(filename ='watermark2.jpg')

输出：

相关用法

注：本文由纯净天空筛选整理自sarthak_ishu11大神的英文原创作品 Wand watermark() function – Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。