Raw Video and Processed Image

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Intro

This page is to help you recognise different screen effects or glitches that help you understand what is needed to adjust the camera controls, TV, monitor, or projector.

When you open the lightgun software under the Configuration tab, you will see two videos, the left side of the video is Raw Camera, and the right side is Processed Image. The goal is to get the Processed Image showing a clear border and blue rectangle as stable as possible when the gun moves around against all odds. You are an eye doctor trying to fix the correct view for the lightgun to see the border.

Software Video Feeds

These two video feeds are tools to correct the problem of lightgun vision.

  1. Raw Camera is what the camera sees that your eyes can't see.
  2. The Processed Image is what the lightgun sees.

Scrrenshot dim display.png

Correct Processed Video

This Processed Image picture is the correct vision when the lightgun can see clearly.

Arrow is not jitter.gif

Incorrect Processed Video

This Processed Image picture shows incorrect vision when the lightgun can see poorly.

Broken border by poor brightens.jpg

Low Power USB Port

The Raw Video showed a quick white flash or quick shift in the picture in the video. This is a glitch that causes low power in the camera. Possibly the USB you plug into is not getting enough power from that USB port.

Examples

Example Results of Low USB Power:

Glitch minor.gif

Glitch major.gif

Troubleshooting Low Power

  • Try another USB port if you have USB 3.0. That will reduce troubleshooting to see if the lightgun camera is at fault or if the other USB port has insufficient power.
  • Without a USB 3.0 port, If you have two lightguns and the other works, try the working lightgun into that possibility of a low-power USB port to see if the working lightgun has the same effect as the other lightgun. If it does have that same effect on the good working lightgun, then probably the USB port is the issue of low power. The cause of the low power of the USB port can have too many devices plugged into the USB port. That may cause the overloading of the maximum power that the USB port can't handle.
  • Rebooting the computer can also fix that glitch.

External Lighting Effects

The reason why the camera may show flashing lights is that Light Emitting Diode (LED), Fluorescent bulbs, and Compact Fluorescent Lamps (CFL) bulbs are turning on and off, the flickering on video becomes more pronounced and obvious because the camera's recording frames per second is unaligned with the frequency of electricity. This is called the strobe effect. Here is an example of this strobe effect from the Compact Fluorescent Lamps in the background from the lightgun in the Raw video.

Arrow is not jitter.gif

Monitor Differences

What does this have to do with my TV, monitors, or projector? Although the technologies inside CRT and LCD monitors are quite different, what’s happening in each scenario has a similar underlying cause:

  • CRT: Your camera’s frame rate doesn’t match up with the monitor’s refresh rate.
  • LCD (including LED-backlit LCD monitors): You see a bit of flicker when an LCD monitor displays a video camera. Much of this has to do with the pulse width modulation used to regulate the brightness of many LED-backlit displays. Pulse width modulation is essentially like flicking a power switch on and off at a very fast rate: It pulses the amount of power supplied to the backlight system based on the selected brightness level. All LED monitors are really LCD displays with LED backlights.

Stobe Effect

Example 1 - Good

Strobe2.gif

Example 2 - Bad

Strobe1.gif

Example 3 - Very Bad

Strobe3.gif

Fixing Strobe Effect

  1. Increasing brightness and exposure from the Sinden Software camera controls.
  2. Change your TV, monitors, or projector settings to increase the brightness and contrast without washing out the colours.
  3. Try to get the brightness and equal contrast levels of brightness because trying to reduce the blackness or darkness part of the display can create a stronger effect from your TV, monitors, or projector.
  4. Once you have nearly a stable blue rectangle, as in the Example 1 picture. You can adjust the Border Colour Match Radius setting in the Configuration tab.

You won't be able to eliminate the strobe effect completely but reduce it so the Processed Image shows the correct vision.

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