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  • Author Author: Former Member
  • Date Created: Date Created
  • Views 3341 views
  • Likes 1 like
  • Comments 11 comments
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Raspberry Pi - Image processing for UAV navigation

Former Member

Hey all,

 

I am quite new to the Raspberry Pi world but very interested. I have done a few basic things on the Raspberry Pi so far, the main one was learning to code in python (as I already know C) and learning to use a linux based system (first time!).

 

So far I own a 256Mb Raspberry Pi model B, 512Mb Raspberry Pi model B and a Gertboard.

 

The main project I will be working on involves:

     -Determining the image processing capabilities of the Raspberry Pi

     -Get a webcam working with the Raspberry Pi, accessed via python and C (most likely using openCV)

     -Write a program to capture an image, wait, capture another, compare these two images and determine the direction and speed (using the wait time)

     -Implement this on a UAV as the main navigation protocol (Pretty much like the AR Drones)

 

I will be using the new Raspberry Pi camera when I can get my hands on it but for now the webcam will suit for proof of concept, also will most likely be using C as my final programming language as it is faster than python (disregarding pypi)

 

Anyway, I will be no doubt be needing help in this project and hope to find others doing similar things, and I will try help others who need it.

 

Cheers,

 

PudFish (Dan)

image

  • in reply to Former Member

    Arun,

     

    IMO the approach expected here is almost the opposite you are pretending. You - as many of other users like me - have the great advantage to access knowledge and examples that expert users shares continuously. So I suggest you get the code that is offered as an example and modify it trying to work in your specific envinronment.

     

    Enrico

  • Need help in image processing by pi 2.

     

    Regards

    Hassan mughal

  • in reply to Former Member

    Hi Dan,I am gowri shanker from india . I chose ur project as my final year project in engineering .Here is my project explanation.

    we will use a land robot that has a camera attached to the raspberry pi .when i wave my hand infront of the camera,my robot should identify my hand movement and to move accordingly.

    I have a raspberry pi B model board.

    since i am new to raspberry pi , i don't know how to start my programming for raspberry pi.

    I have installed Raspbian OS and Open CV.

    I have worked on PIC controllers with C language .Now learning about python.

    so can u please modify ur code according my requirement .so that it will be useful for my startup.

     

    waiting for a positive reply...

  • Now, That TakePic function works really well thankyou, so this is my code below. I run the program and can see the webcam feed, I then press a key capturing an image as img1, then again but as img2, and again img3. Now when the final image displays (img2+img3) it just shows img3 added to itself, i.e. as though I coded Add(img3,img3,img1). I have also tried AddWeighted and AND functions.

     

    I have tried and tried and cannot find the problem, is it the Add function that is not reading img2, or could img2 not be saved properly? or what is going on!!

     

    Any help would be great,

     

    Cheers,

     

    Dan.

     

     

    # Daniel Myers
    # cvTest.py
    # 18 Feb 13

     

    from cv import *

     

    SIZE=(HEIGHT,WIDTH)=(640,480) # Image capture size
    CAMERA_INDEX=-1 # -1 means any camera attached

     

    def TakePic(cam):
        NamedWindow('cvTest',CV_WINDOW_AUTOSIZE)
        while True:
            img=QueryFrame(cam)
            ShowImage('cvTest',img)
            k=WaitKey(2)
            if k>=0:
                return img

     

    cam=CaptureFromCAM(CAMERA_INDEX) # Initializes capturing a video from a camera
    SetCaptureProperty(cam,CV_CAP_PROP_FRAME_WIDTH,WIDTH) # Set the capture image width
    SetCaptureProperty(cam,CV_CAP_PROP_FRAME_HEIGHT,HEIGHT) # Set the capture image height

     

    img1=TakePic(cam)
    ShowImage('img1',img1)

     

    img2=TakePic(cam)
    ShowImage('img2',img2)

     

    img3=TakePic(cam)
    ShowImage('img3',img3)

     

    AddWeighted(img2,0.4,img3,0.6,20,img1)
    ShowImage('img2+img3',img1)

     

    k=WaitKey(100000)
    DestroyAllWindows()
    del(cam)