Team:Imperial College/Validation

From 2008.igem.org

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(New page: {{Imperial/StartPage2}} = Validating Tracking Software = ImageJ was used primarily to analyse images. Various plugins were tested, such as SpotTracker and Particle Tracker, but both faile...)
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{{Imperial/StartPage2}}
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=== Validating Tracking Software ===
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= Validating Tracking Software =
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{{Imperial/Box2|
ImageJ was used primarily to analyse images. Various plugins were tested, such as SpotTracker and Particle Tracker, but both failed to producing any form of convincing result. Microscopy videos were captured using Volocity software, which also provided a cell tracking function. Thus analysis of synthetic videos was done '''manually''' and using 64-Bit '''Volocity''' analysis software. The synthetic video shown to the right was used as an input for the tracking of synthetic cells.  
ImageJ was used primarily to analyse images. Various plugins were tested, such as SpotTracker and Particle Tracker, but both failed to producing any form of convincing result. Microscopy videos were captured using Volocity software, which also provided a cell tracking function. Thus analysis of synthetic videos was done '''manually''' and using 64-Bit '''Volocity''' analysis software. The synthetic video shown to the right was used as an input for the tracking of synthetic cells.  
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#Identify the cell of interest and start new track.
#Identify the cell of interest and start new track.
#Click on the centroid of the cell of interest. This will cause the image to advance to the next frame. Continue till the cell exits field of view  
#Click on the centroid of the cell of interest. This will cause the image to advance to the next frame. Continue till the cell exits field of view  
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#Once tracking is complete, end track and save results with a .xls extension.
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#Once tracking is complete, end track and save results with a .xls extension.|}}
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= Validation Process =
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{{Imperial/Box1|Validation Process|
A synthetic video of five cells with changing shape was used in the evaluation of tracking software. Each cell was tracked using respective tracking software, and their coordinates in pixels were obtained.
A synthetic video of five cells with changing shape was used in the evaluation of tracking software. Each cell was tracked using respective tracking software, and their coordinates in pixels were obtained.
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#Calculate the distance travelled in each frame for both synthetic and tracking data
#Calculate the distance travelled in each frame for both synthetic and tracking data
#Obtain the errors in coordinates, displacement and distance travelled by the cell
#Obtain the errors in coordinates, displacement and distance travelled by the cell
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{{Imperial/Box2|Results|
The errors associated with manual tracking and Volocity software are shown below. All errors are given in terms of pixels.
The errors associated with manual tracking and Volocity software are shown below. All errors are given in terms of pixels.
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== Manual Tracking ==
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*Manual Tracking
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= Evaluation =
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{{Imperial/Box1|Evaluation
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== Conclusion ==
 
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*Manual tracking will be used to track ''B. subtilis''.
 
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*Manual tracking will be used to track ''B. subtilis''.
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|}}
{{Imperial/EndPage}}
{{Imperial/EndPage}}

Revision as of 16:37, 28 October 2008

Validating Tracking Software

ImageJ was used primarily to analyse images. Various plugins were tested, such as SpotTracker and Particle Tracker, but both failed to producing any form of convincing result. Microscopy videos were captured using Volocity software, which also provided a cell tracking function. Thus analysis of synthetic videos was done manually and using 64-Bit Volocity analysis software. The synthetic video shown to the right was used as an input for the tracking of synthetic cells.

Volocity

Volocity 64-Bit was used to analyse synthetic videos created. The following protocol was followed:

  1. Filter images using SD intensity of lower limit -100 and upper limit -35. This is to select cells which have a dark cell body.
  2. Set tracking method to trajectory variation
  3. Check the box "Ignore Stationary Objects" to disable tracking of the image border
  4. Set displacement estimation to automatic
  5. Begin tracking using Ctrl-U

Manual Tracking

Synthetic cells were tracked using ImageJ via the Manual Tracking Plugin. The following protocol was followed:

  1. Save .avi movie as an image sequence and then import image sequence.
  2. Start Manual Tracking Plugin.
  3. Identify the cell of interest and start new track.
  4. Click on the centroid of the cell of interest. This will cause the image to advance to the next frame. Continue till the cell exits field of view
  5. Once tracking is complete, end track and save results with a .xls extension.

Validation Process

A synthetic video of five cells with changing shape was used in the evaluation of tracking software. Each cell was tracked using respective tracking software, and their coordinates in pixels were obtained.

The following steps were taken to analyse tracking data:

  1. Convert synthetic trajectory coordinate points into pixels.
  2. Calculate the displacement in each frame for both synthetic and tracking data
  3. Calculate the distance travelled in each frame for both synthetic and tracking data
  4. Obtain the errors in coordinates, displacement and distance travelled by the cell

Results


The errors associated with manual tracking and Volocity software are shown below. All errors are given in terms of pixels.

  • Manual Tracking

{

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Evaluation

{

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