mirror of
https://github.com/wassname/scikit-image.git
synced 2026-07-12 20:45:35 +08:00
sccolbert
136 lines
4.3 KiB
Python
136 lines
4.3 KiB
Python
from util import prepare_for_display, window_manager, GuiLockError
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import numpy as np
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import sys
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try:
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# We try to aquire the gui lock first or else the gui import might
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# trample another GUI's PyOS_InputHook.
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window_manager.acquire('qt')
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except GuiLockError, gle:
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print gle
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else:
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try:
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from PyQt4.QtGui import (QApplication, QMainWindow, QImage, QPixmap,
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QLabel, QWidget, QVBoxLayout)
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except ImportError:
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print 'PyQT4 libraries not installed. Plugin not loaded.'
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window_manager._release('qt')
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else:
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app = None
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class LabelImage(QLabel):
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def __init__(self, parent, arr):
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QLabel.__init__(self)
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self.parent = parent
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# we need to hold a reference to
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# arr because QImage doesn't copy the data
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# and the buffer must be alive as long
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# as the image is alive.
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self.arr = arr
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# we also need to pass in the row-stride to
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# the constructor, because we can't guarantee
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# that every row of the numpy data is
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# 4-byte aligned. Which Qt would require
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# if we didnt pass the stride.
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self.img = QImage(arr.data, arr.shape[1], arr.shape[0],
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arr.strides[0], QImage.Format_RGB888)
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self.pm = QPixmap.fromImage(self.img)
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self.setPixmap(self.pm)
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def mouseMoveEvent(self, evt):
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self.parent.label_mouseMoveEvent(evt)
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class ImageWindow(QMainWindow):
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def __init__(self, arr, mgr):
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QMainWindow.__init__(self)
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self.mgr = mgr
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self.label = LabelImage(self, arr)
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self.setCentralWidget(self.label)
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self.mgr.add_window(self)
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def closeEvent(self, event):
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# Allow window to be destroyed by removing any
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# references to it
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self.mgr.remove_window(self)
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def label_mouseMoveEvent(self, evt):
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pass
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class FancyImageWindow(ImageWindow):
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def __init__(self, arr, mgr):
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ImageWindow.__init__(self, arr, mgr)
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self.arr = arr
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# for image manipulation
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self.arrfloat = np.asarray(arr, dtype=np.float64)
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self.arruint8 = arr.copy()
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self.statusBar().showMessage('X: Y: ')
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self.label.setScaledContents(True)
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self.label.setMouseTracking(True)
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def keyPressEvent(self, evt):
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self.arrfloat[:,:,0] *= 1.1
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np.clip(self.arrfloat, 0, 255, self.arrfloat)
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self.arr[:] = self.arrfloat[:]
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pm = QPixmap.fromImage(self.label.img)
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self.label.setPixmap(pm)
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print 'heard'
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def scale_mouse_pos(self, x, y):
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width = self.label.width()
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height = self.label.height()
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x_frac = 1. * x / width
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y_frac = 1. * y / height
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width = self.arr.shape[1]
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height = self.arr.shape[0]
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new_x = int(width * x_frac)
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new_y = int(height * y_frac)
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return(new_x, new_y)
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def label_mouseMoveEvent(self, evt):
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x = evt.x()
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y = evt.y()
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x, y = self.scale_mouse_pos(x, y)
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msg = 'X: %d, Y: %d ' % (x, y)
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R = self.arr[y,x,0]
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G = self.arr[y,x,1]
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B = self.arr[y,x,2]
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msg += 'R: %s, G:, %s, B: %s' % (R, G, B)
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self.statusBar().showMessage(msg)
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def imshow(arr, fancy=False):
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global app
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if not app:
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app = QApplication([])
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arr = prepare_for_display(arr)
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if not fancy:
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iw = ImageWindow(arr, window_manager)
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else:
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iw = FancyImageWindow(arr, window_manager)
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iw.show()
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def _app_show():
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global app
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if app and window_manager.has_windows():
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app.exec_()
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else:
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print 'No images to show. See `imshow`.'
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