matpoltlib图像显示在pyqt上
时间: 2023-10-25 18:36:51 浏览: 175
要在PyQt上显示matplotlib图像,可以使用PyQt内置的QGraphicsView和QGraphicsScene类。下面是一个简单的实现方法:
首先,需要将matplotlib的图像转换为PyQt的Pixmap格式。可以使用下面的代码将matplotlib图像转换为Pixmap:
```python
import io
import numpy as np
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
from PyQt5.QtGui import QImage, QPixmap
def fig2pixmap(fig):
buf = io.BytesIO()
fig.savefig(buf, format='rgba', dpi=100)
buf.seek(0)
im = np.frombuffer(buf.getvalue(), dtype=np.uint8)
im = im.reshape(fig.canvas.get_width_height()[::-1] + (4,))
im = im[..., :3]
qim = QImage(im.data, im.shape[1], im.shape[0], QImage.Format_RGB888)
pixmap = QPixmap.fromImage(qim)
return pixmap
```
接下来,可以使用QGraphicsView和QGraphicsScene类来显示图像。下面是一个简单的示例:
```python
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QGraphicsScene, QGraphicsView
from PyQt5.QtGui import QPixmap
import matplotlib.pyplot as plt
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("Matplotlib in PyQt")
self.setGeometry(100, 100, 800, 600)
# 创建一个matplotlib图形
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1,2,3,4,5], [1,2,3,4,5])
# 将matplotlib图像转换为PyQt的Pixmap
pixmap = fig2pixmap(fig)
# 创建一个QGraphicsScene和QGraphicsView来显示图像
scene = QGraphicsScene(self)
view = QGraphicsView(self)
view.setScene(scene)
view.setRenderHint(QPixmap.Antialiasing)
# 将Pixmap添加到QGraphicsScene中
scene.addPixmap(pixmap)
# 将QGraphicsView添加到主窗口中
self.setCentralWidget(view)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
```
这个示例创建了一个简单的matplotlib图形,然后将其转换为PyQt的Pixmap格式,并使用QGraphicsView和QGraphicsScene来显示图像。在实际应用中,可以根据需要自定义QGraphicsView和QGraphicsScene的样式和交互方式。
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