ValueError: Expected a mutable image

OpenMV Products
1

Hello,

I want to know why this code:

import sensor
import time
import machine

sensor.reset() # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.HD) # Set frame size to QVGA (320x240)
sensor.skip_frames(time=2000) # Wait for settings take effect.

while(True):
img = sensor.snapshot()
img.find_circles()

Generates this error:

image

2

Hi, which board are you using? Does it have SDRAM? If not, then there’s not enough RAM to store the image and we converted it to bayer which is a format we primarily use for just viewing. However, most of our functions cannot process it.

You need to lower your resolution.

3

Thank you for the explanation.

Im using Nicla Vision and I think that is exactly the problem.

4

Yeah, you need to stay at 320x240 or lower.

5

in fact using HVGA 480x320 is also possible to apply some methods.

Thank you again for the fast response