draw multiple ovals with color

[Hao Jiang-3]

Hello all, I need some help here
 
I'm trying to draw some ovals on image, based on a list, so the code
just like this
 
Vector Points, each element is an object contains position and color
 
w=5;
for(int i = 0; i < Points.size(); i++){

Object o = Points.elementAt(i);

x=o.getx();

y=o.gety();

color=o.getcolor();

ip.drawOval(x-w/2, y-w/2, w,w);

imp.updateAndDraw();

}

 

I can get all the ovals I want, but can't set color, use
ip.setColor(color) was not working.

 

On another hand, if I use

OvalRoi oval = new OvalRoi((x-w/2, y-w/2, w,w, imp);

oval.setColor(color);

imp.setRoi(oval);

 

I can get the color I wanted but found only one oval on the image.

 

What's the correct way to draw multiple ovals with different color?

 

Thanks

 

Hao

 


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[Hao Jiang-3]

 
I'm afraid yes, what can I do?

-----Original Message-----
From: Wayne Rasband [mailto:[hidden email]]
Sent: Wednesday, June 18, 2008 1:00 PM
To: Hao Jiang
Subject: Re: draw multiple ovals with color

Hao,

Are you drawing the ovals on a color image? The ip.setColor() method
will not cause ovals to be in color on a grayscale image.

-wayne

On Jun 18, 2008, at 12:44 PM, Hao Jiang wrote:

> Hello all, I need some help here
>
> I'm trying to draw some ovals on image, based on a list, so the code
> just like this
>
> Vector Points, each element is an object contains position and color
>
> w=5;
> for(int i = 0; i < Points.size(); i++){
>
> Object o = Points.elementAt(i);
>
> x=o.getx();
>
> y=o.gety();
>
> color=o.getcolor();
>
> ip.drawOval(x-w/2, y-w/2, w,w);
>
> imp.updateAndDraw();
>
> }
>
>
>
> I can get all the ovals I want, but can't set color, use
> ip.setColor(color) was not working.
>
>
>
> On another hand, if I use
>
> OvalRoi oval = new OvalRoi((x-w/2, y-w/2, w,w, imp);
>
> oval.setColor(color);
>
> imp.setRoi(oval);
>
>
>
> I can get the color I wanted but found only one oval on the image.
>
>
>
> What's the correct way to draw multiple ovals with different color?
>
>
>
> Thanks
>
>
>
> Hao
>
>
>
>
> **********************************************************************
> *
> **
> PRIVILEGE AND CONFIDENTIALITY NOTICE:
>
> The information in this email is intended for the named recipients
> only.
> It may contain privileged and confidential information.  If you have
> received this communication in error, any use, copying or
> dissemination of its contents is strictly prohibited.  Please erase
> all copies of the message along with any included attachments and
> notify Intermap Technologies or the sender immediately by telephone at

> the number indicated on this page.
>
> **********************************************************************
> *
> **





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It may contain privileged and confidential information.  If you have
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of its contents is strictly prohibited.  Please erase all copies of the
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[Wayne Rasband]

> I'm afraid yes, what can I do?

You can create a display list of ROIs, each in a different color, and  
display it as a graphic overlay.

    w=5;
    Vector displayList = new Vector();
    for(int i = 0; i < Points.size(); i++){
       Object o = Points.elementAt(i);
       x=o.getx();
       y=o.gety();
       color=o.getcolor();
       Roi circle = new OvalRoi(x-w/2, y-w/2, w,w);
       circle.setInstanceColor(color);
       displayList.add(circle);
    }
    ImageCanvas ic = imp.getCanvas();
    ic.setDisplayList(displayList);

Here are some example plugins that use display lists:

    http://rsb.info.nih.gov/ij/plugins/graphic-overlay.html
    http://rsb.info.nih.gov/ij/plugins/download/Concentric_Circles.java
    http://rsb.info.nih.gov/ij/plugins/grid.html
    http://rsb.info.nih.gov/ij/plugins/download/misc/MultiColor_ROIs.java

-wayne

>
> -----Original Message-----
> From: Wayne Rasband [mailto:[hidden email]]
> Sent: Wednesday, June 18, 2008 1:00 PM
> To: Hao Jiang
> Subject: Re: draw multiple ovals with color
>
> Hao,
>
> Are you drawing the ovals on a color image? The ip.setColor() method
> will not cause ovals to be in color on a grayscale image.
>
> -wayne
>
> On Jun 18, 2008, at 12:44 PM, Hao Jiang wrote:
>
>> Hello all, I need some help here
>>
>> I'm trying to draw some ovals on image, based on a list, so the code
>> just like this
>>
>> Vector Points, each element is an object contains position and color
>>
>> w=5;
>> for(int i = 0; i < Points.size(); i++){
>>
>> Object o = Points.elementAt(i);
>>
>> x=o.getx();
>>
>> y=o.gety();
>>
>> color=o.getcolor();
>>
>> ip.drawOval(x-w/2, y-w/2, w,w);
>>
>> imp.updateAndDraw();
>>
>> }
>>
>>
>>
>> I can get all the ovals I want, but can't set color, use
>> ip.setColor(color) was not working.
>>
>>
>>
>> On another hand, if I use
>>
>> OvalRoi oval = new OvalRoi((x-w/2, y-w/2, w,w, imp);
>>
>> oval.setColor(color);
>>
>> imp.setRoi(oval);
>>
>>
>>
>> I can get the color I wanted but found only one oval on the image.
>>
>>
>>
>> What's the correct way to draw multiple ovals with different color?
>>
>>
>>
>> Thanks
>>
>>
>>
>> Hao
>>
>>
>>
>>
>> **********************************************************************
>> *
>> **
>> PRIVILEGE AND CONFIDENTIALITY NOTICE:
>>
>> The information in this email is intended for the named recipients
>> only.
>> It may contain privileged and confidential information.  If you have
>> received this communication in error, any use, copying or
>> dissemination of its contents is strictly prohibited.  Please erase
>> all copies of the message along with any included attachments and
>> notify Intermap Technologies or the sender immediately by telephone at
>
>> the number indicated on this page.
>>
>> **********************************************************************
>> *
>> **
>
>
>
>
>
> ***********************************************************************
> **
> PRIVILEGE AND CONFIDENTIALITY NOTICE:
>
> The information in this email is intended for the named recipients  
> only.
> It may contain privileged and confidential information.  If you have
> received this communication in error, any use, copying or dissemination
> of its contents is strictly prohibited.  Please erase all copies of the
> message along with any included attachments and notify Intermap
> Technologies or the sender immediately by telephone at the number
> indicated on this page.
>
> ***********************************************************************
> **

[Hao Jiang-3]

Thanks very much, now I got it

Just a small thing, if I set w < 10, I don't really get a circle.


Hao

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of
Wayne Rasband
Sent: Wednesday, June 18, 2008 2:06 PM
To: [hidden email]
Subject: Re: draw multiple ovals with color

> I'm afraid yes, what can I do?

You can create a display list of ROIs, each in a different color, and
display it as a graphic overlay.

    w=5;
    Vector displayList = new Vector();
    for(int i = 0; i < Points.size(); i++){
       Object o = Points.elementAt(i);
       x=o.getx();
       y=o.gety();
       color=o.getcolor();
       Roi circle = new OvalRoi(x-w/2, y-w/2, w,w);
       circle.setInstanceColor(color);
       displayList.add(circle);
    }
    ImageCanvas ic = imp.getCanvas();
    ic.setDisplayList(displayList);

Here are some example plugins that use display lists:

    http://rsb.info.nih.gov/ij/plugins/graphic-overlay.html
    http://rsb.info.nih.gov/ij/plugins/download/Concentric_Circles.java
    http://rsb.info.nih.gov/ij/plugins/grid.html
 
http://rsb.info.nih.gov/ij/plugins/download/misc/MultiColor_ROIs.java

-wayne

>
> -----Original Message-----
> From: Wayne Rasband [mailto:[hidden email]]
> Sent: Wednesday, June 18, 2008 1:00 PM
> To: Hao Jiang
> Subject: Re: draw multiple ovals with color
>
> Hao,
>
> Are you drawing the ovals on a color image? The ip.setColor() method
> will not cause ovals to be in color on a grayscale image.
>
> -wayne
>
> On Jun 18, 2008, at 12:44 PM, Hao Jiang wrote:
>
>> Hello all, I need some help here
>>
>> I'm trying to draw some ovals on image, based on a list, so the code
>> just like this
>>
>> Vector Points, each element is an object contains position and color
>>
>> w=5;
>> for(int i = 0; i < Points.size(); i++){
>>
>> Object o = Points.elementAt(i);
>>
>> x=o.getx();
>>
>> y=o.gety();
>>
>> color=o.getcolor();
>>
>> ip.drawOval(x-w/2, y-w/2, w,w);
>>
>> imp.updateAndDraw();
>>
>> }
>>
>>
>>
>> I can get all the ovals I want, but can't set color, use
>> ip.setColor(color) was not working.
>>
>>
>>
>> On another hand, if I use
>>
>> OvalRoi oval = new OvalRoi((x-w/2, y-w/2, w,w, imp);
>>
>> oval.setColor(color);
>>
>> imp.setRoi(oval);
>>
>>
>>
>> I can get the color I wanted but found only one oval on the image.
>>
>>
>>
>> What's the correct way to draw multiple ovals with different color?
>>
>>
>>
>> Thanks
>>
>>
>>
>> Hao
>>
>>
>>
>>
>> *********************************************************************
>> *
>> *
>> **
>> PRIVILEGE AND CONFIDENTIALITY NOTICE:
>>
>> The information in this email is intended for the named recipients
>> only.
>> It may contain privileged and confidential information.  If you have
>> received this communication in error, any use, copying or
>> dissemination of its contents is strictly prohibited.  Please erase
>> all copies of the message along with any included attachments and
>> notify Intermap Technologies or the sender immediately by telephone
>> at
>
>> the number indicated on this page.
>>
>> *********************************************************************
>> *
>> *
>> **
>
>
>
>
>
> **********************************************************************
> *
> **
> PRIVILEGE AND CONFIDENTIALITY NOTICE:
>
> The information in this email is intended for the named recipients
> only.
> It may contain privileged and confidential information.  If you have
> received this communication in error, any use, copying or
> dissemination of its contents is strictly prohibited.  Please erase
> all copies of the message along with any included attachments and
> notify Intermap Technologies or the sender immediately by telephone at

> the number indicated on this page.
>
> **********************************************************************
> *
> **




*************************************************************************
PRIVILEGE AND CONFIDENTIALITY NOTICE:

The information in this email is intended for the named recipients only.
It may contain privileged and confidential information.  If you have
received this communication in error, any use, copying or dissemination
of its contents is strictly prohibited.  Please erase all copies of the
message along with any included attachments and notify Intermap
Technologies or the sender immediately by telephone at the number
indicated on this page.

*************************************************************************