def exec_image_open_dialog(parent,
basedir='',
app_name=None,
to_grayscale=True,
dtype=None):
"""
Executes an image open dialog box (QFileDialog.getOpenFileName)
* parent: parent widget (None means no parent)
* basedir: base directory ('' means current directory)
* app_name (opt.): application name (used as a title for an eventual
error message box in case something goes wrong when saving image)
* to_grayscale (default=True): convert image to grayscale
Returns (filename, data) tuple if dialog is accepted, None otherwise
"""
saved_in, saved_out, saved_err = sys.stdin, sys.stdout, sys.stderr
sys.stdout = None
filename, _filter = getopenfilename(
parent, _("Open"), basedir,
io.iohandler.get_filters('load', dtype=dtype))
sys.stdin, sys.stdout, sys.stderr = saved_in, saved_out, saved_err
filename = to_text_string(filename)
try:
data = io.imread(filename, to_grayscale=to_grayscale)
except Exception as msg:
import traceback
traceback.print_exc()
QMessageBox.critical(parent,
_('Error') if app_name is None else app_name,
(_("%s could not be opened:") % osp.basename(filename))+\
"\n"+str(msg))
return
return filename, data
def exec_image_open_dialog(parent, basedir='', app_name=None,
to_grayscale=True, dtype=None):
"""
Executes an image open dialog box (QFileDialog.getOpenFileName)
* parent: parent widget (None means no parent)
* basedir: base directory ('' means current directory)
* app_name (opt.): application name (used as a title for an eventual
error message box in case something goes wrong when saving image)
* to_grayscale (default=True): convert image to grayscale
Returns (filename, data) tuple if dialog is accepted, None otherwise
"""
saved_in, saved_out, saved_err = sys.stdin, sys.stdout, sys.stderr
sys.stdout = None
filename, _filter = getopenfilename(parent, _("Open"), basedir,
io.iohandler.get_filters('load', dtype=dtype))
sys.stdin, sys.stdout, sys.stderr = saved_in, saved_out, saved_err
filename = to_text_string(filename)
try:
data = io.imread(filename, to_grayscale=to_grayscale)
except Exception as msg:
import traceback
traceback.print_exc()
QMessageBox.critical(parent,
_('Error') if app_name is None else app_name,
(_("%s could not be opened:") % osp.basename(filename))+\
"\n"+str(msg))
return
return filename, data
def create_test_data(fname, func=None):
array0 = io.imread(osp.join(osp.dirname(__file__), fname),
to_grayscale=True)
if func is not None:
array0 = func(array0)
item0 = make.trimage(array0, dx=.1, dy=.1)
return array0, item0
def _get_image_data(self, data, filename, title, to_grayscale):
if data is None:
assert filename is not None
from guiqwt import io
data = io.imread(filename, to_grayscale=to_grayscale)
if title is None and filename is not None:
title = osp.basename(filename)
return data, filename, title
def open_image(self, filename):
"""Opening image *filename*"""
self.data = io.imread(filename, to_grayscale=True)
self.show_data(self.data)
param = ImageParam()
param.title = filename
param.height, param.width = self.data.shape
update_dataset(self.param_gbox.dataset, param)
self.param_gbox.get()
self.filter_gbox.setEnabled(True)
def open_image(self, filename):
"""Opening image *filename*"""
self.data = io.imread(filename, to_grayscale=True)
self.show_data(self.data)
param = ImageParam()
param.title = filename
param.height, param.width = self.data.shape
update_dataset(self.param_gbox.dataset, param)
self.param_gbox.get()
self.filter_gbox.setEnabled(True)
def test():
"""Test"""
import os.path as osp
from guiqwt import io, scaler, pyplot as plt
filename = osp.join(osp.dirname(__file__), "brain.png")
data = io.imread(filename)
dst_image = scaler.resize(data, (2000, 3000))
plt.imshow(dst_image, interpolation='nearest')
plt.show()
def test():
"""Test"""
import os.path as osp
from guiqwt import io, scaler, pyplot as plt
filename = osp.join(osp.dirname(__file__), "brain.png")
data = io.imread(filename)
dst_image = scaler.resize(data, (2000, 3000))
plt.imshow(dst_image, interpolation='nearest')
plt.show()
def test():
"""Test"""
# -- Create QApplication
import guidata
_app = guidata.qapplication()
# --
from guiqwt.tests.imagexy import compute_image
x, y, data = compute_image()
imshow(x, y, data, filter_area=(-3., -1., 0., 2.), yreverse=False)
# --
import os.path as osp, numpy as np
from guiqwt import io
filename = osp.join(osp.dirname(__file__), "brain.png")
data = io.imread(filename, to_grayscale=True)
x = np.linspace(0, 30., data.shape[1])
y = np.linspace(0, 30., data.shape[0])
imshow(x, y, data, filter_area=(10, 20, 5, 15))
def test():
"""Test"""
# -- Create QApplication
import guidata
_app = guidata.qapplication()
# --
from guiqwt.tests.imagexy import compute_image
x, y, data = compute_image()
imshow(x, y, data, filter_area=(-3., -1., 0., 2.), yreverse=False)
# --
import os.path as osp, numpy as np
from guiqwt import io
filename = osp.join(osp.dirname(__file__), "brain.png")
data = io.imread(filename, to_grayscale=True)
x = np.linspace(0, 30., data.shape[1])
y = np.linspace(0, 30., data.shape[0])
imshow(x, y, data, filter_area=(10, 20, 5, 15))
def imread(fname, to_grayscale=False):
"""Read data from *fname*"""
from guiqwt import io
return io.imread(fname, to_grayscale=to_grayscale)
def add_image_from_file(self, filename):
image = ImageParam()
image.title = to_text_string(filename)
image.data = io.imread(filename, to_grayscale=True)
image.height, image.width = image.data.shape
self.add_image(image)
def add_image_from_file(self, filename):
image = ImageParam()
image.title = to_text_string(filename)
image.data = io.imread(filename, to_grayscale=True)
image.height, image.width = image.data.shape
self.add_image(image)
def imread(fname, to_grayscale=False):
"""Read data from *fname*"""
from guiqwt import io
return io.imread(fname, to_grayscale=to_grayscale)