"In the world ye shall have tribulation: but be of good cheer; I have overcome the world." –John 16:33

License plate reading: Narrowing the license plate search area

Day 329 of 1000

I had a little time this afternoon to play with the images I generated yesterday.  You can see the previous steps I took to get to this point here.  The first step I took was to find the brakelights based on yesterdays images.  That was not too hard, but I am going to have to spend some time to handle the variability in brakelight sizes, intensity, and shade.  Nevertheless, it is definitely something with which I can work.  Here are the brakelight finds for a couple of the sample images:

Back of car - brake light find Back of pickup - brakelight find

From there, I established a search window within which to look for the plate.  I put the search region at the bottom of the image which is something I will have to adjust, but I should be able to narrow the window down both horizontally and vertically without too much trouble.

Back of car - plate search ROI Back of pickup - plate search ROI

The next step will be to “robustify” the brakelight finder and narrow down the search region for the plate.  It might take me a week or so to get back to this as I have lots of stuff on my day job right now.

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License plate reading: Great progress in finding the plate

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Harder to visit Charlotte

2 Comments

  1. Thanks for sharing your thought processes in solving this challenge! As a fellow nerd it is fun to hear how you are addressing it. Have a great week!

  2. Dad

    Thanks for reading Gene! You might be the only one? The few other people who read this stuff use it as an aid to get to sleep.

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