finding pattern using image processing

[spanand]

Hello Sir/Madam,
i am doing a small project to find the movement of the patient under radiotherapy for that i need a help. i have a dot in a white sheet is it possible to get the exact co-ordinates of the dot in the acquired image. please i need the exact solution. i dont want to use the mouse click just by the code i need the co-ordinates of a dot present in that image. please help me as soon as possible.


Thank you with regards,
P.Anand
USIC,
Madurai Kamaraj University.
 

[MikeS81]

Hi spanand,

what have you done so far? What do you know about the image? Where do you habe problems?

Mike

[spanand]

i am trying to detect the movement of the patient under treatment and i have detect the movement by finding the standard deviation of the image from image histograph vi and keeping it as a template at the initial stage. after that all the image's SD Value will be compared with that standard template. this method is not working perfect. so i mark a point on the patient's body and i planned to get the co-ordinates of the mark i made and comparing the co-ordinates with the next successive images. i ma using Web Camera for grabbing the image.

[ST5]

I made a program for you, and included some B/W 24-bit 100x100 pictures with a dot.

Set the treshold, and the program calculates the center of the dot.

Image preprocessing is maybe done in your existing machine, otherwise has to be added.

More info as text in the program

Succes !

.

 

Message Edited by ST5 on 04-19-2010 07:08 AM

[muks]

---

spanand wrote:
i am trying to detect the movement of the patient under treatment and i have detect the movement by finding the standard deviation of the image from image histograph vi and keeping it as a template at the initial stage. after that all the image's SD Value will be compared with that standard template. this method is not working perfect. so i mark a point on the patient's body and i planned to get the co-ordinates of the mark i made and comparing the co-ordinates with the next successive images. i ma using Web Camera for grabbing the image.

---

How will you ensure that the point marked by you always comes under the camera view? Cant a simple threshold and particle analysis detect the patient?

[spanand]

       i will fix the camera in such a way that it will always focus the particular spot. the threshold can't detect the patients very little movement i need even very little movement of the patient to be detected. i need the co-ordinates of the point so that i can detect the patients movement effectively.

[muks]

Can you post a image?

[spanand]

     image of the code i cant send but for an example i attach the image of the dot for that i want to get the co-ordinates. 

[muks]

Try this

[ST5]

Did you look at the solution I posted here?

Message Edited by ST5 on 04-20-2010 04:24 AM