gabrielpasv's profile - activity

Hi People,

I am new to OpenCV and I am working a project to detect a car. This is a little different from the ones I found online.

Check the brief description:

1. In this project the car approaches the gate then stop
2. We have a camera in front of the car capturing car image
3. Need to detect the presence of the car and take the snapshot
4. Pass the snapshot image as a parameter for my anpr library.
5. Will return the car plate and display it to the user.

I could try to run the anpr lib on every frame, but that will impact on performance. That's why I need something to detect the car first, and then pass it to my anpr lib

Thanks

I am trying to run my program on ubuntu and I got this message. I searched online and I found out it is a warning, not actually an error. However this message is bugging me. I would like to remove it from my ubuntu 12.04

libdc1394 error failed to initialize libdc1394

I don't have the file /dev/raw1394 . THis file doesn't exist. So I don't know what to do. My program runs on a aws instance with ubuntu 12.04

Any help will be appreciated.

Thanks

Hi Guys,

I am having a hard time choosing a IP camera to use on my project. I need a IP camera with very good lens so I can use it on my anpr project (automatic number plate recognition). I have google for it but I still not confident to buy yet. I wanted to hear from you guys that are the experts.

Can you help me ? Thanks

Hi Guys, I am new to openCV.

I need to use template Matching fuction of openCV and I need some help. I have a video stream and I want to compare each frame with several templates.

So I have a database of templates (about 4 or 5 images) that I need to use to find my ROI on the video stream. How is that can be done ? I google for it but I couldn't find anything with multiple templates. I found the opposite (find several matches with one template) but not finding one match with multiple templates.

i didn't express myself correctly. I already have a ANPR library (Automatic number plate reader.) I just need a way to capture the front of the car from a video stream so I can send the snapshot to my library to read it. I already have a plate recognition system however it needs a image as input. So now I need to find out how to capture the correct frames.

Thanks for your help.

Hi Guys,

I want to write a software where it will have a IP camera as input and I need to detect cars and take a snapshot of the front of the car and then send this image to my OCR. I already have a OCR library to integrate to my code.

The cars will be passing by a detection area and I should be able to take the snapshot. How do I do that ? template matching with every frame of the video ? How do I add more then 1 template to compare on each frame ?

Sometimes the car will be passing fast and sometimes slow. I need something similar to the freeflow. See this video https://www.youtube.com/watch?v=5Kfp7EFmT98

I already have the OCR which needs a image as input. So now I need to find a way to do the detection.

Thanks

I am trying to write a very good ANPR (automatic number plate recognition) system for Brazil's cars plates. So far I have used the javaANPR method which is the X and Y projection to find the ROI (car plate). It works well but not so good with image that has a lot of shadow in the car. And I am using tesseract-ocr as well for character recognition.

I got 80% of success for really good car images, from cars not moving.

And I got less than 60% for not so good images from moving cars.

I have been resourcing online, reading papers, etc. What do you think could help me improve it ? Maybe marge two methods ? Use templateMatch as well ? Because I need about 95% - 98% of success rate.

I see the anpronline Their demo: https://www.anpronline.net/demo.html

They have done a really good job. It worked on 100% of my images.

Are you guys aware of what OCR engine do they use ? Maybe this is a top secret.

But can you guys point me to the right direction of how to improve my OCR ?

I really appreciate any help.

Thanks

Hi People,

I am working on developing a ANPR software to recognize license plate numbers using openCV. I have studied the JavaANPR project. YOu can check more on this link

http://javaanpr.sourceforge.net/anpr.pdf

This project uses the vertical and horizontal projection after make the image gray to find out the band where the plate is.

However when using it on my car images sometimes I get more than one "peak" for the vertical projection. I wanted to ask if there's a way to use some heuristics algorithms to find out which "peak" is the correct one.

Can someone help me ? Thank You