ImageStim and GratingStim do not display an image that is stored as numpy array

Coding
1

I want to display an image RGB image. but the image is not a string of the image directory. it a numpy array with size 256x256x3. I have tried with both ImageStim and GratingStim but it did not work. it just displays the background without the image. I am using the psychopy version ‘2020.1.2’.

I have tried many things: scaled the image between -1 and 1; scaled the image between 0 and 1; scaled between 0 and 255; I have converted the image with a size 3x256x256. All of them gave me the same results. it only shows the background.

import numpy as np
import cv2 as cv
from psychopy import visual as pp_visual

win = pp_visual.Window(
    color=[0, 0, 0],
    colorSpace='rgb',
    units="pix",
    fullscr=False,
    allowGUI=False)

directory_t_pose = 'T_pose.png'
image_t_pose = (cv.imread(directory_t_pose).astype(float) / 255 * 2) - 1
frame_t_pose = pp_visual.ImageStim(win=win, image=image_t_pose)

for t in range(100):
    frame_t_pose.draw()
    win.flip()
2

Can you explain what that means?

3

thanks @Michael for your quick reply

I have reworded. I hope it is more clear now.

4

Can you upload the image file so we can run the script?

6

here is the image. thanks.

T_pose

7

I remember it used to work about 1 year ago. So I tried to run it with psychopy 3.2.3 or psychopy 3.2.2, and with pyglet 1.3.3 or 1.3.2. It doesn’t work anyway. It may be an update of another library.

8

is anyone helping, please?