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is there a way to change the calibration bar value???

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jamal jamal

is there a way to change the calibration bar value???

Dear all,

I would
like to make calibration bar using Image J but i want it with my own
values.is there a way to change the calibration bar value??? for
example, when i use DICOM image gives me calibration bar range 0-255 is
there a way to change to different range like from 133-to144 instead
0-255???

please somebody response to me as soon as possible

thank u

Jamal

Robert Dougherty

Re: is there a way to change the calibration bar value???

Jamal,
Try Image/Adjust Brightness and Contrast . . . before creating the calibration bar.
Bob

Robert P. Dougherty
President
OptiNav, Inc.
1414 127th Pl NE #106
Bellevue, WA 98005
(425) 891-4883
FAX (425) 467-1119
[hidden email]
www.optinav. com

On Aug 13, 2011, at 3:27 PM, jamal jamal <[hidden email]> wrote:

> Dear all,
>
> I would
> like to make calibration bar using Image J but i want it with my own
> values.is there a way to change the calibration bar value??? for
> example, when i use DICOM image gives me calibration bar range 0-255 is
> there a way to change to different range like from 133-to144 instead
> 0-255???
>
> please somebody response to me as soon as possible
>
> thank u
>
> Jamal

jamal jamal

Re: is there a way to change the calibration bar value???

i really thank you & appreciate your help Mr. Robert, but my problem i face is i want to add my own value to make calibration bar & in case i change the brightness or contrast some information will be lost in the image.

i wanna add these values to make calibration bar, for example:
Pixel value Relative Dose %
145 100
144.5 90
144 80
143.5 70
143 60
142.5 50
142 40
141.5 30
141 20
140.5 10

i measured the Pixel value from Computed Tomography ( CT) Image & i want make calibration bar corresponding to these value.
as u can see it's linear relationship & i wanna make these value as calibration bar to read other images.

please inform me if u have an idea how to solve this problem

i thank u again for response

yours
Jamal

> Date: Sat, 13 Aug 2011 15:50:18 -0700
> From: [hidden email]
> Subject: Re: is there a way to change the calibration bar value???
> To: [hidden email]
>

> Jamal,
> Try Image/Adjust Brightness and Contrast . . . before creating the calibration bar.
> Bob
>
> Robert P. Dougherty
> President
> OptiNav, Inc.
> 1414 127th Pl NE #106
> B14ellevue, WA 98005
> (425) 891-4883
> FAX (425) 467-1119
> [hidden email]
> www.optinav. com
>
> On Aug 13, 2011, at 3:27 PM, jamal jamal <[hidden email]> wrote:
>
> > Dear all,
> >
> > I would
> > like to make calibration bar using Image J but i want it with my own
> > values.is there a way to change the calibration bar value??? for
> > example, when i use DICOM image gives me calibration bar range 0-255 is
> > there a way to change to different range like from 133-to144 instead
> > 0-255???
> >
> > please somebody response to me as soon as possible
> >
> > thank u
> >
> > Jamal

Robert Dougherty

Re: is there a way to change the calibration bar value???

Jamal,

Perhaps Analyze/Calibrate... ?

Bob

On Aug 14, 2011, at 4:14 AM, jamal jamal wrote:

> i really thank you & appreciate your help Mr. Robert, but my problem i face is i want to add my own value to make calibration bar & in case i change the brightness or contrast some information will be lost in the image.
>
> i wanna add these values to make calibration bar, for example:
> Pixel value Relative Dose %
> 145 100
> 144.5 90
> 144 80
> 143.5 70
> 143 60
> 142.5 50
> 142 40
> 141.5 30
> 141 20
> 140.5 10
>
> i measured the Pixel value from Computed Tomography ( CT) Image & i want make calibration bar corresponding to these value.
> as u can see it's linear relationship & i wanna make these value as calibration bar to read other images.
>
>
> please inform me if u have an idea how to solve this problem
>
> i thank u again for response
>
> yours
> Jamal
>

jamal jamal

Re: is there a way to change the calibration bar value???

i think may be analyze/ calibrate..... but this option gives u a figure show the linearity or exponential relationship & so on......, so after we get this figure do u think is there a possible way to convert it to calibration bar ????because i have tried but it didn't work with me but sure based on my little experience in Image J

Jamal

> Date: Sun, 14 Aug 2011 08:13:30 -0700
> From: [hidden email]
> Subject: Re: is there a way to change the calibration bar value???
> To: [hidden email]
>
> Jamal,
>
> Perhaps Analyze/Calibrate... ?
>
> Bob
>
> On Aug 14, 2011, at 4:14 AM, jamal jamal wrote:
>
> > i really thank you & appreciate your help Mr. Robert, but my problem i face is i want to add my own value to make calibration bar & in case i change the brightness or contrast some information will be lost in the image.
> >
> > i wanna add these values to make calibration bar, for example:
> > Pixel value Relative Dose %
> > 145 100
> > 144.5 90
> > 144 80
> > 143.5 70
> > 143 60
> > 142.5 50
> > 142 40
> > 141.5 30
> > 141 20
> > 140.5 10
> >
> > i measured the Pixel value from Computed Tomography ( CT) Image & i want make calibration bar corresponding to these value.
> > as u can see it's linear relationship & i wanna make these value as calibration bar to read other images.
> >
> >
> > please inform me if u have an idea how to solve this problem
> >
> > i thank u again for response
> >
> > yours
> > Jamal
> >

Robert Dougherty

Re: is there a way to change the calibration bar value???

Jamal,

As far as I know, the process is:

1. Analyze/Calibrate to input your calibration curve
2. Image/Adjust Brightness and Contrast... to select the range of calibrated values to show in the image
3. Analyze/Tools/Calibration Bar... to make a new, RGB, image with the calibration bar included

A different approach is to convert your image to 32-bit with Image/Type/32-bit. Then you can use the mathematical transformations to map the pixel values into Relative Dose %. In your case, you would subtract 140 and multiply by 20, so that a pixel value of 140 is mapped to 0 and and pixel value of 145 is mapped to 5 and then 100. Use Process/Math/Subtract.... and then Process/Math/Multiply. After that, you can Adjust Brightness and Contrast and then create the calibration bar.

Bob

On Aug 14, 2011, at 10:03 AM, jamal jamal wrote:

> i think may be analyze/ calibrate..... but this option gives u a figure show the linearity or exponential relationship & so on......, so after we get this figure do u think is there a possible way to convert it to calibration bar ????because i have tried but it didn't work with me but sure based on my little experience in Image J
>
> Jamal
>
>> Date: Sun, 14 Aug 2011 08:13:30 -0700
>> From: [hidden email]
>> Subject: Re: is there a way to change the calibration bar value???
>> To: [hidden email]
>>
>> Jamal,
>>
>> Perhaps Analyze/Calibrate... ?
>>
>> Bob
>>
>> On Aug 14, 2011, at 4:14 AM, jamal jamal wrote:
>>
>>> i really thank you & appreciate your help Mr. Robert, but my problem i face is i want to add my own value to make calibration bar & in case i change the brightness or contrast some information will be lost in the image.
>>>
>>> i wanna add these values to make calibration bar, for example:
>>> Pixel value Relative Dose %
>>> 145 100
>>> 144.5 90
>>> 144 80
>>> 143.5 70
>>> 143 60
>>> 142.5 50
>>> 142 40
>>> 141.5 30
>>> 141 20
>>> 140.5 10
>>>
>>> i measured the Pixel value from Computed Tomography ( CT) Image & i want make calibration bar corresponding to these value.
>>> as u can see it's linear relationship & i wanna make these value as calibration bar to read other images.
>>>
>>>
>>> please inform me if u have an idea how to solve this problem
>>>
>>> i thank u again for response
>>>
>>> yours
>>> Jamal
>>>
>

Robert Dougherty, Ph.D.
President, OptiNav, Inc.
1414 127th Place NE #106
Bellevue, WA 98005
(425)891-4883
FAX (425)467-1119
www.optinav.com
[hidden email]

jamal jamal

Re: is there a way to change the calibration bar value???

i really thank u very much Mr.Robert , i'll try it & will see what i'm gonna get

> Date: Sun, 14 Aug 2011 10:37:36 -0700
> From: [hidden email]
> Subject: Re: is there a way to change the calibration bar value???
> To: [hidden email]
>
> Jamal,
>
> As far as I know, the process is:
>
> 1. Analyze/Calibrate to input your calibration curve
> 2. Image/Adjust Brightness and Contrast... to select the range of calibrated values to show in the image
> 3. Analyze/Tools/Calibration Bar... to make a new, RGB, image with the calibration bar included
>
> A different approach is to convert your image to 32-bit with Image/Type/32-bit. Then you can use the mathematical transformations to map the pixel values into Relative Dose %. In your case, you would subtract 140 and multiply by 20, so that a pixel value of 140 is mapped to 0 and and pixel value of 145 is mapped to 5 and then 100. Use Process/Math/Subtract.... and then Process/Math/Multiply. After that, you can Adjust Brightness and Contrast and then create the calibration bar.
>
> Bob
>
>
>
>
>
> On Aug 14, 2011, at 10:03 AM, jamal jamal wrote:
>
> > i think may be analyze/ calibrate..... but this option gives u a figure show the linearity or exponential relationship & so on......, so after we get this figure do u think is there a possible way to convert it to calibration bar ????because i have tried but it didn't work with me but sure based on my little experience in Image J
> >
> > Jamal
> >
> >> Date: Sun, 14 Aug 2011 08:13:30 -0700
> >> From: [hidden email]
> >> Subject: Re: is there a way to change the calibration bar value???
> >> To: [hidden email]
> >>
> >> Jamal,
> >>
> >> Perhaps Analyze/Calibrate... ?
> >>
> >> Bob
> >>
> >> On Aug 14, 2011, at 4:14 AM, jamal jamal wrote:
> >>
> >>> i really thank you & appreciate your help Mr. Robert, but my problem i face is i want to add my own value to make calibration bar & in case i change the brightness or contrast some information will be lost in the image.
> >>>
> >>> i wanna add these values to make calibration bar, for example:
> >>> Pixel value Relative Dose %
> >>> 145 100
> >>> 144.5 90
> >>> 144 80
> >>> 143.5 70
> >>> 143 60
> >>> 142.5 50
> >>> 142 40
> >>> 141.5 30
> >>> 141 20
> >>> 140.5 10
> >>>
> >>> i measured the Pixel value from Computed Tomography ( CT) Image & i want make calibration bar corresponding to these value.
> >>> as u can see it's linear relationship & i wanna make these value as calibration bar to read other images.
> >>>
> >>>
> >>> please inform me if u have an idea how to solve this problem
> >>>
> >>> i thank u again for response
> >>>
> >>> yours
> >>> Jamal
> >>>
> >
>
> Robert Dougherty, Ph.D.
> President, OptiNav, Inc.
> 1414 127th Place NE #106
> Bellevue, WA 98005
> (425)891-4883
> FAX (425)467-1119
> www.optinav.com
> [hidden email]

tangji0318

Re: is there a way to change the calibration bar value???

In reply to this post by Robert Dougherty

Dear Bob,
I encountered a similar question. I have a 32-bit image, whose intensity is from 0 to 0.27. I have set a LUT and Calibration bar, but I do want to get the bar from 0 to 0.5, not the max of intensity. And I found Analyze->Calibrate cannot help. Do you have any ideas? I will really appreciate your help.

Ji

LIM Soon Yew John (IMB)

Re: is there a way to change the calibration bar value???

Hi Ji,

Have you try to first set the display range from 0 to 0.5 by using Image>Adjust Brightness/Contrast...>Set before you apply calibration bar?

Best Regards,
John

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________________________________________
From: ImageJ Interest Group [[hidden email]] On Behalf Of tangji0318 [[hidden email]]
Sent: Monday, May 04, 2015 2:12 PM
To: [hidden email]
Subject: Re: is there a way to change the calibration bar value???

Dear Bob,
I encountered a similar question. I have a 32-bit image, whose intensity is
from 0 to 0.27. I have set a LUT and Calibration bar, but I do want to get
the bar from 0 to 0.5, not the max of intensity. And I found
Analyze->Calibrate cannot help. Do you have any ideas? I will really
appreciate your help.

Ji

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tangji0318

Re: is there a way to change the calibration bar value???

Dear John,
Thank you very much. I think I'm too stupid to forget to click "Set" to set the range. Thanks again.

Ji