def check_getArrayRegion(roi, name, testResize=True, transpose=False):
initState = roi.getState()
#win = pg.GraphicsLayoutWidget()
win = pg.GraphicsView()
win.show()
resizeWindow(win, 200, 400)
# Don't use Qt's layouts for testing--these generate unpredictable results.
#vb1 = win.addViewBox()
#win.nextRow()
#vb2 = win.addViewBox()
# Instead, place the viewboxes manually
vb1 = pg.ViewBox()
win.scene().addItem(vb1)
vb1.setPos(6, 6)
vb1.resize(188, 191)
vb2 = pg.ViewBox()
win.scene().addItem(vb2)
vb2.setPos(6, 203)
vb2.resize(188, 191)
img1 = pg.ImageItem(border='w')
img2 = pg.ImageItem(border='w')
vb1.addItem(img1)
vb2.addItem(img2)
np.random.seed(0)
data = np.random.normal(size=(7, 30, 31, 5))
data[0, :, :, :] += 10
data[:, 1, :, :] += 10
data[:, :, 2, :] += 10
data[:, :, :, 3] += 10
if transpose:
data = data.transpose(0, 2, 1, 3)
img1.setImage(data[0, ..., 0])
vb1.setAspectLocked()
vb1.enableAutoRange(True, True)
roi.setZValue(10)
vb1.addItem(roi)
if isinstance(roi, pg.RectROI):
if transpose:
assert roi.getAffineSliceParams(data, img1, axes=(1, 2)) == ([
28.0, 27.0
], ((1.0, 0.0), (0.0, 1.0)), (1.0, 1.0))
else:
assert roi.getAffineSliceParams(data, img1, axes=(1, 2)) == ([
27.0, 28.0
], ((1.0, 0.0), (0.0, 1.0)), (1.0, 1.0))
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
#assert np.all((rgn == data[:, 1:-2, 1:-2, :]) | (rgn == 0))
img2.setImage(rgn[0, ..., 0])
vb2.setAspectLocked()
vb2.enableAutoRange(True, True)
app.processEvents()
assertImageApproved(win, name + '/roi_getarrayregion',
'Simple ROI region selection.')
with pytest.raises(TypeError):
roi.setPos(0, False)
roi.setPos([0.5, 1.5])
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name + '/roi_getarrayregion_halfpx',
'Simple ROI region selection, 0.5 pixel shift.')
roi.setAngle(45)
roi.setPos([3, 0])
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name + '/roi_getarrayregion_rotate',
'Simple ROI region selection, rotation.')
if testResize:
roi.setSize([60, 60])
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name + '/roi_getarrayregion_resize',
'Simple ROI region selection, resized.')
img1.scale(1, -1)
img1.setPos(0, img1.height())
img1.rotate(20)
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name + '/roi_getarrayregion_img_trans',
'Simple ROI region selection, image transformed.')
vb1.invertY()
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(win, name + '/roi_getarrayregion_inverty',
'Simple ROI region selection, view inverted.')
roi.setState(initState)
img1.resetTransform()
img1.setPos(0, 0)
img1.scale(1, 0.5)
rgn = roi.getArrayRegion(data, img1, axes=(1, 2))
img2.setImage(rgn[0, ..., 0])
app.processEvents()
assertImageApproved(
win, name + '/roi_getarrayregion_anisotropic',
'Simple ROI region selection, image scaled anisotropically.')
# allow the roi to be re-used
roi.scene().removeItem(roi)
def test_ImageItem(transpose=False):
w = pg.GraphicsWindow()
view = pg.ViewBox()
w.setCentralWidget(view)
w.resize(200, 200)
w.show()
img = TransposedImageItem(border=0.5, transpose=transpose)
view.addItem(img)
# test mono float
np.random.seed(0)
data = np.random.normal(size=(20, 20))
dmax = data.max()
data[:10, 1] = dmax + 10
data[1, :10] = dmax + 12
data[3, :10] = dmax + 13
img.setImage(data)
QtTest.QTest.qWaitForWindowShown(w)
time.sleep(0.1)
app.processEvents()
assertImageApproved(
w, 'imageitem/init',
'Init image item. View is auto-scaled, image axis 0 marked by 1 line, axis 1 is marked by 2 lines. Origin in bottom-left.'
)
# ..with colormap
cmap = pg.ColorMap([0, 0.25, 0.75, 1],
[[0, 0, 0, 255], [255, 0, 0, 255], [255, 255, 0, 255],
[255, 255, 255, 255]])
img.setLookupTable(cmap.getLookupTable())
assertImageApproved(w, 'imageitem/lut', 'Set image LUT.')
# ..and different levels
img.setLevels([dmax + 9, dmax + 13])
assertImageApproved(w, 'imageitem/levels1', 'Levels show only axis lines.')
img.setLookupTable(None)
# test mono int
data = np.fromfunction(lambda x, y: x + y * 10,
(129, 128)).astype(np.int16)
img.setImage(data)
assertImageApproved(w, 'imageitem/gradient_mono_int', 'Mono int gradient.')
img.setLevels([640, 641])
assertImageApproved(w, 'imageitem/gradient_mono_int_levels',
'Mono int gradient w/ levels to isolate diagonal.')
# test mono byte
data = np.fromfunction(lambda x, y: x + y, (129, 128)).astype(np.ubyte)
img.setImage(data)
assertImageApproved(w, 'imageitem/gradient_mono_byte',
'Mono byte gradient.')
img.setLevels([127, 128])
assertImageApproved(w, 'imageitem/gradient_mono_byte_levels',
'Mono byte gradient w/ levels to isolate diagonal.')
# test monochrome image
data = np.zeros((10, 10), dtype='uint8')
data[:5, :5] = 1
data[5:, 5:] = 1
img.setImage(data)
assertImageApproved(w, 'imageitem/monochrome',
'Ubyte image with only 0,1 values.')
# test bool
data = data.astype(bool)
img.setImage(data)
assertImageApproved(w, 'imageitem/bool', 'Boolean mask.')
# test RGBA byte
data = np.zeros((100, 100, 4), dtype='ubyte')
data[..., 0] = np.linspace(0, 255, 100).reshape(100, 1)
data[..., 1] = np.linspace(0, 255, 100).reshape(1, 100)
data[..., 3] = 255
img.setImage(data)
assertImageApproved(w, 'imageitem/gradient_rgba_byte',
'RGBA byte gradient.')
img.setLevels([[128, 129], [128, 255], [0, 1], [0, 255]])
assertImageApproved(
w, 'imageitem/gradient_rgba_byte_levels',
'RGBA byte gradient. Levels set to show x=128 and y>128.')
# test RGBA float
data = data.astype(float)
img.setImage(data / 1e9)
assertImageApproved(w, 'imageitem/gradient_rgba_float',
'RGBA float gradient.')
# checkerboard to test alpha
img2 = TransposedImageItem(transpose=transpose)
img2.setImage(np.fromfunction(lambda x, y: (x + y) % 2, (10, 10)),
levels=[-1, 2])
view.addItem(img2)
img2.scale(10, 10)
img2.setZValue(-10)
data[..., 0] *= 1e-9
data[..., 1] *= 1e9
data[..., 3] = np.fromfunction(lambda x, y: np.sin(0.1 * (x + y)),
(100, 100))
img.setImage(data, levels=[[0, 128e-9], [0, 128e9], [0, 1], [-1, 1]])
assertImageApproved(w, 'imageitem/gradient_rgba_float_alpha',
'RGBA float gradient with alpha.')
# test composition mode
img.setCompositionMode(QtGui.QPainter.CompositionMode_Plus)
assertImageApproved(
w, 'imageitem/gradient_rgba_float_additive',
'RGBA float gradient with alpha and additive composition mode.')
img2.hide()
img.setCompositionMode(QtGui.QPainter.CompositionMode_SourceOver)
# test downsampling
data = np.fromfunction(lambda x, y: np.cos(0.002 * x**2), (800, 100))
img.setImage(data, levels=[-1, 1])
assertImageApproved(w, 'imageitem/resolution_without_downsampling',
'Resolution test without downsampling.')
img.setAutoDownsample(True)
assertImageApproved(w, 'imageitem/resolution_with_downsampling_x',
'Resolution test with downsampling axross x axis.')
assert img._lastDownsample == (4, 1)
img.setImage(data.T, levels=[-1, 1])
assertImageApproved(w, 'imageitem/resolution_with_downsampling_y',
'Resolution test with downsampling across y axis.')
assert img._lastDownsample == (1, 4)
view.hide()
def test_PolyLineROI():
rois = [(pg.PolyLineROI([[0, 0], [10, 0], [0, 15]], closed=True,
pen=0.3), 'closed'),
(pg.PolyLineROI([[0, 0], [10, 0], [0, 15]], closed=False,
pen=0.3), 'open')]
#plt = pg.plot()
plt = pg.GraphicsView()
plt.show()
resizeWindow(plt, 200, 200)
vb = pg.ViewBox()
plt.scene().addItem(vb)
vb.resize(200, 200)
#plt.plotItem = pg.PlotItem()
#plt.scene().addItem(plt.plotItem)
#plt.plotItem.resize(200, 200)
plt.scene().minDragTime = 0 # let us simulate mouse drags very quickly.
# seemingly arbitrary requirements; might need longer wait time for some platforms..
QtTest.QTest.qWaitForWindowShown(plt)
QtTest.QTest.qWait(100)
for r, name in rois:
vb.clear()
vb.addItem(r)
vb.autoRange()
app.processEvents()
assertImageApproved(plt, 'roi/polylineroi/' + name + '_init',
'Init %s polyline.' % name)
initState = r.getState()
assert len(r.getState()['points']) == 3
# hover over center
center = r.mapToScene(pg.Point(3, 3))
mouseMove(plt, center)
assertImageApproved(plt, 'roi/polylineroi/' + name + '_hover_roi',
'Hover mouse over center of ROI.')
# drag ROI
mouseDrag(plt, center, center + pg.Point(10, -10),
QtCore.Qt.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/' + name + '_drag_roi',
'Drag mouse over center of ROI.')
# hover over handle
pt = r.mapToScene(pg.Point(r.getState()['points'][2]))
mouseMove(plt, pt)
assertImageApproved(plt, 'roi/polylineroi/' + name + '_hover_handle',
'Hover mouse over handle.')
# drag handle
mouseDrag(plt, pt, pt + pg.Point(5, 20), QtCore.Qt.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/' + name + '_drag_handle',
'Drag mouse over handle.')
# hover over segment
pt = r.mapToScene((pg.Point(r.getState()['points'][2]) +
pg.Point(r.getState()['points'][1])) * 0.5)
mouseMove(plt, pt + pg.Point(0, 2))
assertImageApproved(plt, 'roi/polylineroi/' + name + '_hover_segment',
'Hover mouse over diagonal segment.')
# click segment
mouseClick(plt, pt, QtCore.Qt.LeftButton)
assertImageApproved(plt, 'roi/polylineroi/' + name + '_click_segment',
'Click mouse over segment.')
# drag new handle
mouseMove(
plt, pt + pg.Point(10, -10)
) # pg bug: have to move the mouse off/on again to register hover
mouseDrag(plt, pt, pt + pg.Point(10, -10), QtCore.Qt.LeftButton)
assertImageApproved(plt,
'roi/polylineroi/' + name + '_drag_new_handle',
'Drag mouse over created handle.')
# clear all points
r.clearPoints()
assertImageApproved(plt, 'roi/polylineroi/' + name + '_clear',
'All points cleared.')
assert len(r.getState()['points']) == 0
# call setPoints
r.setPoints(initState['points'])
assertImageApproved(plt, 'roi/polylineroi/' + name + '_setpoints',
'Reset points to initial state.')
assert len(r.getState()['points']) == 3
# call setState
r.setState(initState)
assertImageApproved(plt, 'roi/polylineroi/' + name + '_setstate',
'Reset ROI to initial state.')
assert len(r.getState()['points']) == 3