I have to extract the red mark graph using Aforge blob extraction method but I am unable to extract that particular grid in order to read it.
I have to extract the red mark graph using Aforge blob extraction method but
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have to extract the red mark graph using Aforge blob extraction method but I am unable to extract that particular grid in order to read it.
This task may be pretty simply solved without further AForge using.
If all grids in your sample have a similar structure: i.e. homogeneous grid with vertical-horizonal graphic of function, you can use following algorithm:
Calculating white pixel density for vertical direction as you can see at image below. It’s just a normalized value of sum of all RGB components in each horizontal line (Dont know what’s name of it. If anybody knows it, please report).
You must extract y-axis values with lowest white pixel density and ignore y-axis values in green ellipses. If this minimums has not been founded, you must consider values in green ellipses too. If in considered y-axis values there are white pixels at right in image too many, just ignore it. Otherwise, congrats! We found segment of black line until right angle.
After that this process must be repeated for next horizontal line detection until end of image.
Construction of final function from founded horizontal lines.