pyqtgraph/examples/VideoSpeedTest.py
Ogi Moore 309195ceea
Fix windows hidpi (#1516)
* set environment variables before starting QApp

* fix-422

* Better support of hidpi

* Fix Typo in App-Name

* Remove fontScaleFactor bits

* Add documenation for hidpi displays

* Fix pg not defined
2021-01-27 10:59:07 -08:00

272 lines
8.8 KiB
Python

# -*- coding: utf-8 -*-
"""
Tests the speed of image updates for an ImageItem and RawImageWidget.
The speed will generally depend on the type of data being shown, whether
it is being scaled and/or converted by lookup table, and whether OpenGL
is used by the view widget
"""
import argparse
import sys
import numpy as np
import pyqtgraph as pg
import pyqtgraph.ptime as ptime
from pyqtgraph.Qt import QtGui, QtCore, QT_LIB
import importlib
ui_template = importlib.import_module(f'VideoTemplate_{QT_LIB.lower()}')
try:
import cupy as cp
pg.setConfigOption("useCupy", True)
_has_cupy = True
except ImportError:
cp = None
_has_cupy = False
parser = argparse.ArgumentParser(description="Benchmark for testing video performance")
parser.add_argument('--cuda', default=False, action='store_true', help="Use CUDA to process on the GPU", dest="cuda")
parser.add_argument('--dtype', default='uint8', choices=['uint8', 'uint16', 'float'], help="Image dtype (uint8, uint16, or float)")
parser.add_argument('--frames', default=3, type=int, help="Number of image frames to generate (default=3)")
parser.add_argument('--image-mode', default='mono', choices=['mono', 'rgb'], help="Image data mode (mono or rgb)", dest='image_mode')
parser.add_argument('--levels', default=None, type=lambda s: tuple([float(x) for x in s.split(',')]), help="min,max levels to scale monochromatic image dynamic range, or rmin,rmax,gmin,gmax,bmin,bmax to scale rgb")
parser.add_argument('--lut', default=False, action='store_true', help="Use color lookup table")
parser.add_argument('--lut-alpha', default=False, action='store_true', help="Use alpha color lookup table", dest='lut_alpha')
parser.add_argument('--size', default='512x512', type=lambda s: tuple([int(x) for x in s.split('x')]), help="WxH image dimensions default='512x512'")
args = parser.parse_args(sys.argv[1:])
#QtGui.QApplication.setGraphicsSystem('raster')
app = pg.mkQApp("Video Speed Test Example")
win = QtGui.QMainWindow()
win.setWindowTitle('pyqtgraph example: VideoSpeedTest')
ui = ui_template.Ui_MainWindow()
ui.setupUi(win)
win.show()
try:
from pyqtgraph.widgets.RawImageWidget import RawImageGLWidget
except ImportError:
RawImageGLWidget = None
ui.rawGLRadio.setEnabled(False)
ui.rawGLRadio.setText(ui.rawGLRadio.text() + " (OpenGL not available)")
else:
ui.rawGLImg = RawImageGLWidget()
ui.stack.addWidget(ui.rawGLImg)
# read in CLI args
ui.cudaCheck.setChecked(args.cuda and _has_cupy)
ui.cudaCheck.setEnabled(_has_cupy)
ui.framesSpin.setValue(args.frames)
ui.widthSpin.setValue(args.size[0])
ui.heightSpin.setValue(args.size[1])
ui.dtypeCombo.setCurrentText(args.dtype)
ui.rgbCheck.setChecked(args.image_mode=='rgb')
ui.maxSpin1.setOpts(value=255, step=1)
ui.minSpin1.setOpts(value=0, step=1)
levelSpins = [ui.minSpin1, ui.maxSpin1, ui.minSpin2, ui.maxSpin2, ui.minSpin3, ui.maxSpin3]
if args.cuda and _has_cupy:
xp = cp
else:
xp = np
if args.levels is None:
ui.scaleCheck.setChecked(False)
ui.rgbLevelsCheck.setChecked(False)
else:
ui.scaleCheck.setChecked(True)
if len(args.levels) == 2:
ui.rgbLevelsCheck.setChecked(False)
ui.minSpin1.setValue(args.levels[0])
ui.maxSpin1.setValue(args.levels[1])
elif len(args.levels) == 6:
ui.rgbLevelsCheck.setChecked(True)
for spin,val in zip(levelSpins, args.levels):
spin.setValue(val)
else:
raise ValueError("levels argument must be 2 or 6 comma-separated values (got %r)" % (args.levels,))
ui.lutCheck.setChecked(args.lut)
ui.alphaCheck.setChecked(args.lut_alpha)
#ui.graphicsView.useOpenGL() ## buggy, but you can try it if you need extra speed.
vb = pg.ViewBox()
ui.graphicsView.setCentralItem(vb)
vb.setAspectLocked()
img = pg.ImageItem()
vb.addItem(img)
LUT = None
def updateLUT():
global LUT, ui
dtype = ui.dtypeCombo.currentText()
if dtype == 'uint8':
n = 256
else:
n = 4096
LUT = ui.gradient.getLookupTable(n, alpha=ui.alphaCheck.isChecked())
if _has_cupy and xp == cp:
LUT = cp.asarray(LUT)
ui.gradient.sigGradientChanged.connect(updateLUT)
updateLUT()
ui.alphaCheck.toggled.connect(updateLUT)
def updateScale():
global ui, levelSpins
if ui.rgbLevelsCheck.isChecked():
for s in levelSpins[2:]:
s.setEnabled(True)
else:
for s in levelSpins[2:]:
s.setEnabled(False)
updateScale()
ui.rgbLevelsCheck.toggled.connect(updateScale)
cache = {}
def mkData():
with pg.BusyCursor():
global data, cache, ui, xp
frames = ui.framesSpin.value()
width = ui.widthSpin.value()
height = ui.heightSpin.value()
cacheKey = (ui.dtypeCombo.currentText(), ui.rgbCheck.isChecked(), frames, width, height)
if cacheKey not in cache:
if cacheKey[0] == 'uint8':
dt = xp.uint8
loc = 128
scale = 64
mx = 255
elif cacheKey[0] == 'uint16':
dt = xp.uint16
loc = 4096
scale = 1024
mx = 2**16
elif cacheKey[0] == 'float':
dt = xp.float
loc = 1.0
scale = 0.1
mx = 1.0
else:
raise ValueError(f"unable to handle dtype: {cacheKey[0]}")
if ui.rgbCheck.isChecked():
data = xp.random.normal(size=(frames,width,height,3), loc=loc, scale=scale)
data = pg.gaussianFilter(data, (0, 6, 6, 0))
else:
data = xp.random.normal(size=(frames,width,height), loc=loc, scale=scale)
data = pg.gaussianFilter(data, (0, 6, 6))
if cacheKey[0] != 'float':
data = xp.clip(data, 0, mx)
data = data.astype(dt)
data[:, 10, 10:50] = mx
data[:, 9:12, 48] = mx
data[:, 8:13, 47] = mx
cache = {cacheKey: data} # clear to save memory (but keep one to prevent unnecessary regeneration)
data = cache[cacheKey]
updateLUT()
updateSize()
def updateSize():
global ui, vb
frames = ui.framesSpin.value()
width = ui.widthSpin.value()
height = ui.heightSpin.value()
dtype = xp.dtype(str(ui.dtypeCombo.currentText()))
rgb = 3 if ui.rgbCheck.isChecked() else 1
ui.sizeLabel.setText('%d MB' % (frames * width * height * rgb * dtype.itemsize / 1e6))
vb.setRange(QtCore.QRectF(0, 0, width, height))
def noticeCudaCheck():
global xp, cache
cache = {}
if ui.cudaCheck.isChecked():
if _has_cupy:
xp = cp
else:
xp = np
ui.cudaCheck.setChecked(False)
else:
xp = np
mkData()
mkData()
ui.dtypeCombo.currentIndexChanged.connect(mkData)
ui.rgbCheck.toggled.connect(mkData)
ui.widthSpin.editingFinished.connect(mkData)
ui.heightSpin.editingFinished.connect(mkData)
ui.framesSpin.editingFinished.connect(mkData)
ui.widthSpin.valueChanged.connect(updateSize)
ui.heightSpin.valueChanged.connect(updateSize)
ui.framesSpin.valueChanged.connect(updateSize)
ui.cudaCheck.toggled.connect(noticeCudaCheck)
ptr = 0
lastTime = ptime.time()
fps = None
def update():
global ui, ptr, lastTime, fps, LUT, img
if ui.lutCheck.isChecked():
useLut = LUT
else:
useLut = None
downsample = ui.downsampleCheck.isChecked()
if ui.scaleCheck.isChecked():
if ui.rgbLevelsCheck.isChecked():
useScale = [
[ui.minSpin1.value(), ui.maxSpin1.value()],
[ui.minSpin2.value(), ui.maxSpin2.value()],
[ui.minSpin3.value(), ui.maxSpin3.value()]]
else:
useScale = [ui.minSpin1.value(), ui.maxSpin1.value()]
else:
useScale = None
if ui.rawRadio.isChecked():
ui.rawImg.setImage(data[ptr%data.shape[0]], lut=useLut, levels=useScale)
ui.stack.setCurrentIndex(1)
elif ui.rawGLRadio.isChecked():
ui.rawGLImg.setImage(data[ptr%data.shape[0]], lut=useLut, levels=useScale)
ui.stack.setCurrentIndex(2)
else:
img.setImage(data[ptr%data.shape[0]], autoLevels=False, levels=useScale, lut=useLut, autoDownsample=downsample)
ui.stack.setCurrentIndex(0)
#img.setImage(data[ptr%data.shape[0]], autoRange=False)
ptr += 1
now = ptime.time()
dt = now - lastTime
lastTime = now
if fps is None:
fps = 1.0/dt
else:
s = np.clip(dt*3., 0, 1)
fps = fps * (1-s) + (1.0/dt) * s
ui.fpsLabel.setText('%0.2f fps' % fps)
app.processEvents() ## force complete redraw for every plot
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(0)
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()