LUT doubt: from 8-bit Color to RGB Color in Stacks

[Ignacio Arganda Carreras]

Dear all,

I have a small question about a change-of-type behavior in ImageJ. I
have a 8-bit Color Stack, when I convert it to RGB Color, it loses all
colors. Is that normal?

When I do the same with an individual image, it conserves the color.

Thanks a lot for your help!

ignacio

--
Ignacio Arganda-Carreras
Escuela Politécnica Superior
Laboratorio B-408     Phone: [phone]
Universidad Autónoma de Madrid
Ctra. de Colmenar Viejo, Km. 15
Madrid 28049,  Spain

E-mail: [hidden email]
Website: http://www.ii.uam.es/~iarganda

[Gabriel Landini]

On Thursday 13 November 2008 16:04:23 Ignacio Arganda Carreras wrote:
> I have a small question about a change-of-type behavior in ImageJ. I
> have a 8-bit Color Stack, when I convert it to RGB Color, it loses all
> colors. Is that normal?
>
> When I do the same with an individual image, it conserves the color.
Hola Ignacio,

I can make an 8 bit colour stack  by loading a greyscale stack then convert to
RGB, then to 8bit colour.

If convert this back to RGB, the colours are still there.
It seems to work OK here (running the 1.42b daily build).

Cheers,

G

[Ignacio Arganda Carreras]

Hola Gabriel,

It does work for most images as you said, but not on the ones i'm using.
I sent them to Wayne. Let's see...

Thanks for your help!

ignacio

Gabriel Landini wrote:

> On Thursday 13 November 2008 16:04:23 Ignacio Arganda Carreras wrote:
>  
>> I have a small question about a change-of-type behavior in ImageJ. I
>> have a 8-bit Color Stack, when I convert it to RGB Color, it loses all
>> colors. Is that normal?
>>
>> When I do the same with an individual image, it conserves the color.
>>    
> Hola Ignacio,
>
> I can make an 8 bit colour stack  by loading a greyscale stack then convert to
> RGB, then to 8bit colour.
>
> If convert this back to RGB, the colours are still there.
> It seems to work OK here (running the 1.42b daily build).
>
> Cheers,
>
> G
>
>
>
>  

--
Ignacio Arganda-Carreras
Escuela Politécnica Superior
Laboratorio B-408     Phone: [phone]
Universidad Autónoma de Madrid
Ctra. de Colmenar Viejo, Km. 15
Madrid 28049,  Spain

E-mail: [hidden email]
Website: http://www.ii.uam.es/~iarganda

[Ignacio Arganda Carreras]

Solved!

OK, so the problem was my 8-bit Color images came from a previous 0-1
binary image and i needed to reset min and max.

Thanks a lot Wayne!

ignacio

Gabriel Landini wrote:

> On Thursday 13 November 2008 16:04:23 Ignacio Arganda Carreras wrote:
>  
>> I have a small question about a change-of-type behavior in ImageJ. I
>> have a 8-bit Color Stack, when I convert it to RGB Color, it loses all
>> colors. Is that normal?
>>
>> When I do the same with an individual image, it conserves the color.
>>    
> Hola Ignacio,
>
> I can make an 8 bit colour stack  by loading a greyscale stack then convert to
> RGB, then to 8bit colour.
>
> If convert this back to RGB, the colours are still there.
> It seems to work OK here (running the 1.42b daily build).
>
> Cheers,
>
> G
>
>
>
>  

--
Ignacio Arganda-Carreras
Escuela Politécnica Superior
Laboratorio B-408     Phone: [phone]
Universidad Autónoma de Madrid
Ctra. de Colmenar Viejo, Km. 15
Madrid 28049,  Spain

E-mail: [hidden email]
Website: http://www.ii.uam.es/~iarganda