Gazebo camera sensor output differently in different systems

[witwolf]

I ran pr2 on two different environments, and found that the camera sensor output is a bit different (images are brighter or darker）. Does any body known why ? And is there any other difference
except image that will affect learning performance ?

• Env1 : gazebo 9.9, nvidia 410.73, ubuntu 16.04

• Env2: gazebo 9.11, nvidia 410.93, ubuntu 18.04

• Env3 gazebo 9.9 (compiled) , nvidia 410.93, ubuntu 18.04 (output almost same with Env2)

1. 128x128 L8 and R8G8B8 (Left: Env1, Right: Env2 )

2. 128x128 L8 and R8G8B8 (Left: Env1, Right: Env2 )

3. 640x480 (third perspective) L8 and R8G8B8 (Top: Env1, Bottom: Env2 )