Display RGB image and histo

[olivie...@gmail.com]

Hello everyone,

Is it possible to diplay:

• a RGB image (<type 'numpy.ndarray'> [xSize, ySize, 3] )
• its histo for each channel (R, G and B)
  

Thanks.

[olivie...@gmail.com]

First test
I can display the RGB image.
But I can not see the hystogram by channel... Have you an idea ?

# -*- coding: utf-8 -*-

from pyqtgraph.Qt import QtCore, QtGui

import pyqtgraph as pg

import matplotlib.image as mpimg

# Load image from disk and reorient it for viewing

fname = '../../IMAGES/kitten.jpg'    # This can be any photo image file

photo=mpimg.imread(fname)

photo = photo.transpose([1,0,2])

# Create app

app = QtGui.QApplication([])

## Create window with ImageView widget

win = QtGui.QMainWindow()

win.resize(1200,800)

imv = pg.ImageView()

win.setCentralWidget(imv)

win.show()

win.setWindowTitle(fname)

## Display the data

imv.setImage(photo)

## Start Qt event loop unless running in interactive mode.

if __name__ == '__main__':

    import sys

    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):

        QtGui.QApplication.instance().exec_()

Saisissez le code ici...

Second test
I can not display the RGB image. Why ???
How do to display histogram for each channel (R, G and B)  ?

# -*- coding: utf-8 -*-

from pyqtgraph.Qt import QtCore, QtGui

import pyqtgraph as pg

import matplotlib.image as mpimg

# Load image from disk and reorient it for viewing

fname = '../../IMAGES/kitten.jpg'    # This can be any photo image file

photo=mpimg.imread(fname)

photo = photo.transpose([1,0,2])

# Create app

pg.mkQApp()

## Create window with GraphicsLayoutWidget widget

w = pg.GraphicsLayoutWidget()

w.show()

v = w.addViewBox(row=0, col=0)

## Display the data

img = pg.ImageItem(photo)

v.addItem(img)

## Start Qt event loop unless running in interactive mode.

if __name__ == '__main__':

    import sys

    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):

        QtGui.QApplication.instance().exec_()

Saisissez le code ici...