pyqt graphicsscene保存标注后的图像
时间: 2023-10-25 18:26:03 浏览: 28
要保存GraphicsScene中标注后的图像,可以通过以下步骤实现:
1. 将GraphicsScene中的图像转换为QImage对象:
```python
image = QImage(scene.sceneRect().size().toSize(), QImage.Format_ARGB32_Premultiplied)
painter = QPainter(image)
scene.render(painter)
```
2. 将标注后的内容绘制到QImage对象上:
```python
painter = QPainter(image)
# 绘制标注内容...
```
3. 保存QImage对象:
```python
image.save('path/to/save/image.png')
```
完整的代码示例:
```python
from PyQt5.QtGui import QImage, QPainter
from PyQt5.QtWidgets import QGraphicsScene
scene = QGraphicsScene()
# 加载要标注的图像...
# ...
# 保存标注后的图像
image = QImage(scene.sceneRect().size().toSize(), QImage.Format_ARGB32_Premultiplied)
painter = QPainter(image)
scene.render(painter)
# 绘制标注内容...
# ...
painter.end()
image.save('path/to/save/image.png')
```
注意:在绘制标注内容时,需要在QPainter对象上绘制,而不是在GraphicsScene上绘制。
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