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[英]How to display whole-slide Images (virtual slides) using the OpenSlide Python library? (Not using a web based viewer)
[英]How show Whole-slide image (.svs) in PySide2
想用pyside2開發一個病理圖像識別工具,但不知道如何顯示整個幻燈片圖像(后綴為.svs ),就像ASAP軟件的function可以快速打開並顯示圖像。
您可以使用返回 PIL.Image 的 OpenSlide read_region()
方法,該 PIL.Image 可以使用 PIL.ImageQt 模塊轉換為 QImage。
import sys
from functools import cached_property
from PySide2.QtGui import QImage, QPixmap, QGuiApplication
from PySide2.QtWidgets import QApplication, QComboBox, QLabel, QVBoxLayout, QWidget
import openslide
from PIL.ImageQt import ImageQt
class OpenSlideViewer(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self._slide = None
lay = QVBoxLayout(self)
lay.addWidget(self.combo_level)
lay.addWidget(self.label_slide)
self.combo_level.currentIndexChanged.connect(self.handle_current_index_changed)
@property
def slide(self):
return self._slide
@cached_property
def combo_level(self):
return QComboBox()
@cached_property
def label_slide(self):
return QLabel(scaledContents=True)
def load(self, filename):
self._slide = openslide.OpenSlide(filename)
self.combo_level.clear()
for level in range(self.slide.level_count):
self.combo_level.addItem(f"level-{level}", level)
self.combo_level.setCurrentIndex(0)
def change_level(self, level):
image = self.slide.read_region(
(0, 0), level, self.slide.level_dimensions[level]
)
qimage = ImageQt(image)
pixmap = QPixmap.fromImage(qimage)
self.label_slide.setPixmap(pixmap)
def handle_current_index_changed(self):
level = self.combo_level.currentData()
self.change_level(level)
def main(args):
app = QApplication(args)
viewer = OpenSlideViewer()
filename = "/path/of/filename.svs"
viewer.load(filename)
viewer.resize(640, 480)
viewer.show()
ret = app.exec_()
sys.exit(ret)
if __name__ == "__main__":
main(sys.argv)
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