PyQt5 - How to create circular image from any image?

PyQt5 - How to create circular image from any image?

Creating a circular image from any image using PyQt5 involves a few steps: loading the image, creating a circular mask, and applying the mask to the image. Here's a step-by-step guide to doing this:

Step 1: Install PyQt5

If you haven't installed PyQt5, you can do it using pip:

pip install PyQt5

Step 2: Create a Function to Make an Image Circular

You can use QPixmap and QPainter classes to manipulate images. Here's a function that takes a file path and creates a circular version of the image:

from PyQt5.QtWidgets import QApplication, QLabel, QWidget, QVBoxLayout from PyQt5.QtGui import QPixmap, QPainter, QBrush, QPen, QImage from PyQt5.QtCore import Qt import sys def create_circular_image(image_path): # Load the image original_pixmap = QPixmap(image_path) # Create a QPixmap with the same size as the image circular_pixmap = QPixmap(original_pixmap.size()) circular_pixmap.fill(Qt.transparent) # Fill the pixmap with transparent color # Create a QPainter instance and set the circular mask painter = QPainter(circular_pixmap) painter.setRenderHint(QPainter.Antialiasing) # For smooth edges painter.setBrush(QBrush(original_pixmap)) painter.setPen(QPen(Qt.NoPen)) # No border # Draw a circle painter.drawEllipse(0, 0, original_pixmap.width(), original_pixmap.height()) painter.end() # End painting return circular_pixmap

Step 3: Use the Function in a PyQt5 Window

Create a simple PyQt5 application to display the circular image:

class App(QWidget): def __init__(self): super().__init__() # Use the function circular_pixmap = create_circular_image('path_to_your_image.jpg') # Create a QLabel to display the image label = QLabel(self) label.setPixmap(circular_pixmap) # Layout layout = QVBoxLayout() layout.addWidget(label) self.setLayout(layout) self.setWindowTitle("Circular Image") self.show() if __name__ == "__main__": app = QApplication(sys.argv) ex = App() sys.exit(app.exec_())

Replace 'path_to_your_image.jpg' with the actual path to your image file.

Running the Application

When you run this application, it will display the image as a circle. The function create_circular_image can be reused for any image, turning it into a circular shape.

Additional Notes

  • The circular image will be as large as the smallest dimension of the original image to maintain the aspect ratio.
  • This method uses alpha transparency to create a non-rectangular shape, so the output format should support transparency (like PNG).
  • The quality of the circular image depends on the resolution of the original image. Higher resolution images will produce better results.
  • Ensure the PyQt5 application event loop (app.exec_()) is properly set up to display the window.

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