Python Pillow - ImageDraw.rounded_rectangle() 函式

ImageDraw.rounded_rectangle() 方法用於繪製圓角矩形。矩形透過指定邊界框、角的半徑以及可選的填充顏色、輪廓顏色、線寬和每個角的圓角資訊來定義。

語法

以下是函式的語法：

ImageDraw.rounded_rectangle(xy, radius=0, fill=None, outline=None, width=1, corners=None)

引數

以下是此函式引數的詳細資訊：

• xy - 它指定定義圓角矩形邊界框的兩個點。可以將其指定為兩個元組的序列 [(x0, y0), (x1, y1)] 或作為扁平列表 [x0, y0, x1, y1]。在這兩種情況下，都必須滿足條件 x1 >= x0 和 y1 >= y0。邊界框包含兩個端點。

• radius - 圓角矩形的角半徑。

• fill - 用於填充圓角矩形的顏色。

• outline - 用於圓角矩形輪廓的顏色。

• width - 圓角矩形輪廓的線寬（以畫素為單位）。預設值為 1。

• corners - 一個元組，指示是否要圓角。元組格式為 (左上，右上，右下，左下)。此引數是關鍵字引數。

示例

示例 1

以下示例在指定的邊界框內繪製一個帶有圓角的圓角矩形，使用預設引數。

from PIL import Image, ImageDraw

# Create a new image with a white background
image = Image.new("RGB", (700, 300), "black")
draw = ImageDraw.Draw(image)

# Define the bounding box as a sequence of two tuples
bounding_box = [(250, 30), (450, 270)]

# Specify the radius for the rounded corners
radius = 20

# Draw a rounded rectangle default parameters
draw.rounded_rectangle(bounding_box, radius=radius)

# Display the image
image.show()
print('The rounded rectangle is drawn successfully...')

輸出

The rounded rectangle is drawn successfully...

輸出影像

示例 2

此示例在指定的邊界框內繪製一個帶有圓角的圓角矩形，填充為淺藍色，輪廓為中等青綠色，並指定角的半徑。

from PIL import Image, ImageDraw

# Create a new image with a white background
image = Image.new("RGB", (700, 300), "white")
draw = ImageDraw.Draw(image)

# Define the bounding box as a sequence of two tuples
bounding_box = [(250, 30), (450, 270)]

# Specify the radius for the rounded corners
radius = 50

# Specify fill and outline colors
fill_color = "lightblue"
outline_color = "mediumspringgreen"

# Draw a rounded rectangle
draw.rounded_rectangle(bounding_box, radius=radius, fill=fill_color, outline=outline_color, width=4)

# Display the image
image.show()
print('The rounded rectangle is drawn successfully...')

輸出

The rounded rectangle is drawn successfully...

輸出影像

示例 3

以下示例演示如何在現有影像上使用不同的引數繪製圓角矩形。

from PIL import Image, ImageDraw

# Open an Image
image = Image.open('Images/TP-W.jpg')

# Create the draw object
draw = ImageDraw.Draw(image)

# Define the bounding box as a sequence of two tuples
bounding_box = [(245, 45), (445, 345)]

# Specify the radius for the rounded corners
radius = 40

# Draw a rounded rectangle with custom fill and outline colors
draw.rounded_rectangle(bounding_box, radius=radius, outline="red", width=4)

# Display the image
image.show()

print('The rounded rectangle is drawn successfully...')

輸出

The rounded rectangle is drawn successfully...

輸出影像