** Version Information:
- Python: 3.7.9 - anaconda environment
- numpy = 1.19.4
- Pyqt5 **
I am working on an application wherein I load a binary (.bin) file and convert it to a 2D numpy array. I can read the binary file and I have also managed to convert it to a numpy array. The name of the variable is out and its shape is (512, 1536). As the shape of the array is 2D, it is a grayscale image. The variable contains:
out = array([[ 0, 107, 68, ..., 0, 2, 3],
[ 47, 65, 66, ..., 0, 1, 0],
[ 27, 24, 34, ..., 2, 0, 1],
...,
[124, 127, 124, ..., 136, 140, 147],
[125, 129, 125, ..., 130, 134, 132],
[130, 126, 126, ..., 139, 134, 130]], dtype=uint8)
I used opencv to show the image:
import cv2
cv2.imshow('out', out)
This works and I can see the grayscale image in a new window.
However, when I try to convert the numpy array to Pixmap using the following code the program crashes without outputting any error:
qImg = QPixmap(QImage(out.data, out.shape[1], out.shape[0], QImage.Format_Grayscale8))
print(qImg)
The print(qImg) line should output a pixmap object but it doesn't and just crashes.
I have also tried a few other things:
From this (PyQt5 QImage from Numpy Array) question, I have tired using qimage2ndarray library to convert the numpy array to QImage. Converting to QImage is not a problem. But when QPixmap object is created the program crashes.
q = qimage2ndarray.array2qimage(out)
pix = QPixmap.fromImage(q) # After this line the program crashes
Complete script:
import numpy as np
import sys
from PyQt5.QtGui import QImage, QPixmap
from PyQt5.QtWidgets import QApplication, QLabel
import matplotlib.pyplot as plt
import qimage2ndarray
var = np.array(np.loadtxt('out.txt')).astype(np.uint8)
new_var = var.copy()
q = qimage2ndarray.array2qimage(new_var)
pix = QPixmap.fromImage(q) # Program crashes here
app = QApplication(sys.argv)
w = QLabel()
w.setPixmap(pixmap)
w.show()
sys.exit(app.exec_())
Here the 'out.txt' file is a text file which contains the numpy array.
What could the reason for this be?
Appreciate your help.
Thank You.
Edit 1:
According to this link(Converting numpy image to QPixmap) I also tried the following (extension of the script):
GRAY_COLORTABLE = [qRgb(i, i, i) for i in range(256)]
img_array = out.copy()
bytesPerLine = img_array.strides[1]
print(f'strides:{img_array.strides[1]}') # Output: 1
height, width = img_array.shape
image = QImage(img_array.data,
width, height,
bytesPerLine,
QImage.Format_Indexed8)
image.setColorTable(GRAY_COLORTABLE)
print('image: ', image)
print('test')
new = image.copy()
pixmap = QPixmap.fromImage(new) # Program crashes here
print(pixmap)
And Still I cannot print pixmap object. Cannot get my head around it.
Appreciate your help. Please let me know if something else is needed.
