Save screen image of RIGOL MSO5000 series oscilloscope

load_screen.py

import visa
import argparse
from PIL import Image
import io

argparser = argparse.ArgumentParser()
argparser.add_argument('-a', '--address', required=True, help='VISA address like "TCPIP::{ipaddress}::INSTR"')
argparser.add_argument('-o', '--output', help='Output file name (default: "screen.png")', default='screen.png')
args = argparser.parse_args()

inst = visa.ResourceManager().open_resource(args.address)
print(inst.query('*IDN?').strip())

bmp_bin = inst.query_binary_values(':DISP:DATA?', datatype='B', container=bytes)
img = Image.open(io.BytesIO(bmp_bin))
img.save(args.output, args.output.split('.')[-1])

Requirement

• pyvisa https://pyvisa.readthedocs.io/en/latest/
• PyVISA-py https://pypi.org/project/PyVISA-py/
• Pillow https://pillow.readthedocs.io/en/stable/index.html

If you already have some visa backend software (NI-VISA etc.), PyVISA-py isn't needed.

How to use

The following command means that the script loads a screen image from the oscilloscope whose visa address is TCPIP::192.168.1.21::INSTR and saves them to test.png. Output image format must be what Pillow library supports.
$ python python load_screen.py -a TCPIP::192.168.1.21::INSTR -o test.png

BTW for Rigol MSO8000 by adding PNG parameter to DISPlay:SNAPshot (undocumented) command it is possible to save screen in the PNG-format i.e. :DISP:SNAP? PNG, by default :DISP:SNAP? saves in the BMP-format.