How to reduce AR camera shaking ?

Question

Hello,

I saw the post about reducing vibrations of 3D gameobject augmented from target. (post : https://answers.easyar.com/30/reduce-vibration-gameobject-imagetarget-unity-app-android?show=39#a39 )

kenn mentioned looking at FrameUpdate event, applying lerp to the target result and writing back the position/rotation. I tried to but I can't manage to apply Vector3.Lerp before the ARCamera's position and rotation get updated (in an excessively precise way which creates the display' shaking).

I also tried too add an other ARCamera but I guess I didn't understand how Unity and EasyAR work because I can't get a camera to render reality while another renders the gameobject from target after smoothing its camera's position.

Would someone have any idea or method to smooth the display ?

Thanks 
 

Answer 1

hi,

First need to set the world center at Augmenter for Augmenter
And then rewrite the Update method in ImageTarge's EasyImageTargetBehaviour class

    protected override void Update()
        {
            base.Update();
            float myrx = 0;
            myrx = this.transform.localEulerAngles.x;
            while (myrx >= 360)
            {
                myrx -= 360;
            }
            while (myrx <= -360)
            {
                myrx += 360;
            }
            while (myrx > 270 && 360 - myrx >= 0)
                myrx = -(360 - myrx);
            float myry = 0;
            myry = this.transform.localEulerAngles.y;
            while (myry >= 360)
            {
                myry -= 360;
            }
            while (myry <= -360)
            {
                myry += 360;
            }
        
            while (myry > 270 && 360 - myry >= 0)
                myry = -(360 - myry);

            float myrz = 0;
            myrz = this.transform.localEulerAngles.z;
            while (myrz >= 360)
            {
                myrz -= 360;
            }

            while (myrz <= -360)
            {
                myrz += 360;
            }

            while (myrz > 270 && 360 - myrz >= 0)
                myrz = -(360 - myrz);
              
               if (((Math.Abs(this.transform.position.x - lastX) > 0.06 || Math.Abs(this.transform.position.y - lastY) > 0.06 || Math.Abs(this.transform.position.z - lastZ) > 0.06)&&
            (Math.Abs(this.transform.position.x - lastX) > 0.13 || Math.Abs(this.transform.position.y - lastY) > 0.13 || Math.Abs(this.transform.position.z - lastZ) > 0.13))||
            ( (Math.Abs(myrx - lastRX) > 3 &&Math.Abs(myry - lastRY) >3 &&Math.Abs(myrz - lastRZ) > 3)&& (Math.Abs(myrx - lastRX) > 6 || Math.Abs(myry - lastRY) > 6 || Math.Abs(myrz - lastRZ) > 6))
                {
                    lastX = this.transform.position.x;
                    lastY = this.transform.position.y;
                    lastZ = this.transform.position.z;
                    lastRX = myrx;
                    lastRY = myry;
                    lastRZ = myrz;
                this.transform.rotation = Quaternion.Euler(lastRX, lastRY, lastRZ);
                this.transform.position = new Vector3(lastX, lastY, lastZ);
                }
                else
                {
             
                    this.transform.rotation = Quaternion.Euler(lastRX, lastRY, lastRZ);
                    this.transform.position = new Vector3(lastX, lastY, lastZ);
                }
           
        }

Comments

Unfortunately this code gave me some errors.  Can you please check ?

where LastX, LastY, LastZ ?  

Better is to have some step to follow

Thanks in advance

---

hi,
You need to set the appropriate value

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As said before by another user, that code make errors. Not usable at all.
Please, bring more easy to understand step by step instructions, or the developers we'll have more hard to implement EasyAR on our project.
We understand that you are making a lot of efforts, also translating tutorials to at least English, but this is really needed if you want people around the world be able to use your SDK.
Thanks in advance for all help to the community.

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come on guys.. just think a little bit....

you need this on the top:

float lastX;    float lastRX;
float lastY;    float lastRY;
float lastZ;    float lastRZ;

and use Mathf not Math ...

try some other value for 0.06 / 0.13  and 3 / 6 to optimzie it for your projekt...

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The next version will be released soon. （optimized image tracking）

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awesome.. nice work with the EasyAR SDK!

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hi,
is this working also for the V2 sdk? because i do not have an augmenter and I have huge problem of shaking a video plane ...

thanks

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Hi, do you have some news about new version ? when is should be released ?

Answer 2

my 3d objects vibrate also.... hope they fix it ....

Answer 3

Hi, based on this thread, I worked on a solution to this. 

This script fixes the model shake behavior on EasyAr v2. You should use this instead of ImageTargetBehaviour on your target. Just delete the ImageTargetBehaviour component and add this one.
 

https://gist.github.com/guinunez/83fc638b37a43d57ef30e6966f66bd76

This can still be improved a lot, but it is good enough for me.