Basic operation

Owned by John Medalen
Aug 16, 2013
2 min read
  1. To start the Distortion Correction tool GUI window, follow the following steps are:

Run DevWare, go to the main menu->Plug-ins-> Lens Distortion Correction Tools (Ver 2.0), and the Lens Distortion Correction Tools dialog is shown as followings:

Fig. 1 Distortion Correction DevWarePlugin

The tool can operate in one of two modes: MT9V126 Hardware or Software Simulation. In MT9V126 Hardware mode the process of correcting the lens distortion and adjusting the perspective of the image are done by the system hardware. In the Software Simulation mode, these processes are done by a simulation of the system hardware by DevWare. In order to operate in MT9V126 Hardware an Aptina Imaging Demo camera has to be installed connected to your computer.
When selecting one of these modes, DevWare will automatically switch the sensor to the output format which corresponds with your selected mode. For MT9V126 Hardware DevWare will set the sensor to output Dewarp+Overlay CCIR656 Interlaced image. For Software Simulation DevWare will set the sensor to output 640x480 YCbCr/RGB Progressive image.
You can also change the sensor output mode directly by clicking the Control button in the DevWare toolbar, which brings up the Sensor Control dialog. In there access Digital Video Output and make sure 640x480 YCbCr/RGB Progressive is selected if you want to apply Distortion Correction settings to Devware software simulator, Or Dewarp+Overlay CCIR656 Interlaced if you want to apply the current Distortion Correction setting to sensor.

  1. In Software Simulation mode, the Distortion Correction output format can be specified via Format: in the Output Mode group. Three modes supported: NTSC, PAL and Progressive. In MT9V126 Hardware the output format is determined by the sensor settings and it can be modified by the DevWare sensor control pages.


  1. In Software Simulation mode the Distortion Correction effect can be seen more clearly by selecting Circle Overlay, ten circles with different image heights will be shown on the current frame sensor output, check Enable and you can see what will happen to those circles after Distortion Correction processing. Check Open picture-in-picture if you want to see both images before and after Distortion Correction at the same time. These options are available in Software Simulation mode only.


  1. The Distortion Correction Tool provides a default distortion correction setting for the Marshal wide angle lens. You can import a different setting by click Load Settings… or save the current settings for later use by click Save Settings…


You can find default settings which come with the tool in the folder
<installation-path>\Plugins\Default Lens Correction
You can apply the current Distortion Correction tool setting to either the software simulator or to the sensor by clicking the corresponding radio box at the bottom of Distortion Correction Tools, and then click on Apply button. If Software Simulation is selected, make sure Enable gets checked so that the new Distortion Correction setting can take effect in the Devware display window.