Display hdr using PySide2

display_hdr_qt.py

from PySide2 import QtWidgets, QtGui
from PySide2 import QtCore
import sys
import imageio
import numpy as np
from PIL import Image, ImageQt

imgpath = 'myhdri.hdr'
imageio.plugins.freeimage.download()
img = imageio.imread(imgpath)

# easy gamma correction
img = np.power(img, 1/2.2)
img = np.clip(np.floor(img*255), 0, 255).astype(np.uint8)
image = Image.fromarray(img)
image.thumbnail((600, 600), Image.ANTIALIAS)

# GUIの構築
app = QtWidgets.QApplication(sys.argv)
window = QtWidgets.QMainWindow()
window.setWindowTitle('My HDRI Viewer')

main = QtWidgets.QWidget()
window.setCentralWidget(main)
lay = QtWidgets.QHBoxLayout()
main.setLayout(lay)

# PIL.ImageをQtで読める形に
qim = ImageQt.ImageQt(image)
map = QtGui.QPixmap().fromImage(qim)
### QPixmap().fromImage() にしないとなぜか有効なデータにならず、以下だとNG
#map = QtGui.QPixmap(ImageQt.ImageQt(image))

scene = QtWidgets.QGraphicsScene()
view = QtWidgets.QGraphicsView(scene)
map1 = scene.addPixmap(map)
lay.addWidget(view)

window.show()
sys.exit(app.exec_())