Colouring a black and white image

[ashamim]

Hello Everyone

This might be a silly question but I was wondering if there is any plugin in imageJ which is smart enough to detect the boundaries and fill in the colours with same intensity. For example If I have a black and white image of a face and I want to colour it and lets say if I click on the lips the plugin should be smart enough to recognize the boundaries of the lips and fill in the colour of my choice which same intensities as that of the black and white image. I.e. if in the original image the lips are dark at one end may be because of some shadow the filled colour absorbs the same properties. I just wanted to study if it would be possible for me to write something like this.

Regards
Ahsan

[Cammer, Michael]

Photoshop CS3, 4 or 5 is the way to go for this.  It has many options for segmenting and blending edges.  And you can do the colors in layers for subtle editing.
-Michael

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of ashamim
Sent: Wednesday, August 24, 2011 3:49 PM
To: [hidden email]
Subject: Colouring a black and white image

Hello Everyone

This might be a silly question but I was wondering if there is any plugin in
imageJ which is smart enough to detect the boundaries and fill in the
colours with same intensity. For example If I have a black and white image
of a face and I want to colour it and lets say if I click on the lips the
plugin should be smart enough to recognize the boundaries of the lips and
fill in the colour of my choice which same intensities as that of the black
and white image. I.e. if in the original image the lips are dark at one end
may be because of some shadow the filled colour absorbs the same properties.
I just wanted to study if it would be possible for me to write something
like this.

Regards
Ahsan

-----
Ahsan
--
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[Peter Haub]

Hi Ahsan,

here are some links to some pdf's describing things which are at least
very close to what you are looking for:


http://hci.iwr.uni-heidelberg.de/MIP/Teaching/computational_photography/paper_koethe/levin_04_colorization.pdf
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.65.7003&rep=rep1&type=pdf
http://www.fusion2004.foi.se/papers/IF04-1066.pdf
http://en.wikipedia.org/wiki/Color_mapping
http://www.mrl.nyu.edu/projects/image-analogies/colorize.html
http://www.cs.sunysb.edu/~vislab/papers/colorize-sig02.pdf


Regards,
Peter


On 24.08.2011 21:49, ashamim wrote:

> Hello Everyone
>
> This might be a silly question but I was wondering if there is any plugin in
> imageJ which is smart enough to detect the boundaries and fill in the
> colours with same intensity. For example If I have a black and white image
> of a face and I want to colour it and lets say if I click on the lips the
> plugin should be smart enough to recognize the boundaries of the lips and
> fill in the colour of my choice which same intensities as that of the black
> and white image. I.e. if in the original image the lips are dark at one end
> may be because of some shadow the filled colour absorbs the same properties.
> I just wanted to study if it would be possible for me to write something
> like this.
>
> Regards
> Ahsan
>
> -----
> Ahsan
> --
> View this message in context: http://imagej.588099.n2.nabble.com/Colouring-a-black-and-white-image-tp6721737p6721737.html
> Sent from the ImageJ mailing list archive at Nabble.com.
>

[Michael Schmid]

Hi Ahsan,

if your objects have boundaries with rather sharp edges (strong  
gradient) you could try the Versatile Wand, it can stop the selection  
at sharp gradients (click inside the object of interest, then select  
its options and use 'preview' to select the value and gradient  
tolerance).

Sometimes the Thresholded Blue filter can help you to get sharper  
boundaries of the objects.

Both plugins are at http://imagejdocu.tudor.lu/doku.php?id=plugin:start

If you want to have colors with the same intensity as the B&W image,  
convert your image to a HSB stack, leave the B(rightness) channel  
unchanged and modify the H(ue) & S(aturation) to the desired values  
using 'Fill' or Process>Math>Set.

Michael
________________________________________________________________

On 24 Aug 2011, at 21:49, ashamim wrote:

> Hello Everyone
>
> This might be a silly question but I was wondering if there is any  
> plugin in
> imageJ which is smart enough to detect the boundaries and fill in the
> colours with same intensity. For example If I have a black and  
> white image
> of a face and I want to colour it and lets say if I click on the  
> lips the
> plugin should be smart enough to recognize the boundaries of the  
> lips and
> fill in the colour of my choice which same intensities as that of  
> the black
> and white image. I.e. if in the original image the lips are dark at  
> one end
> may be because of some shadow the filled colour absorbs the same  
> properties.
> I just wanted to study if it would be possible for me to write  
> something
> like this.
>
> Regards
> Ahsan