Re: [SIP-devel] I need some tips on how to equailze an indexed image

[Zhang C. <ch...@ma...>]

Ricardo Fabbri wrote:

>Yes,
>
>I contacted the guys and they may merge their project with SIP in the
>future. Basically a good feature of their toolbox is the ability to
>deal with integer images, and they use Intel's OpenCV as a backend.
>
>Yes, they seem to be quite active recently. We'll have a fruitful
>exchange with them (even though they're not working directly together
>with us).
>
>
>On 9/22/05, Angus Errington <aer...@vi...> wrote:
>  
>
>>Hi,
>>
>>While browsing the scilab contributions website I noticed
>>a new 'toolbox' in the image tools section--Scilab and
>>Image Processing Toolbox:
>>
>>http://sivp.sourceforge.net/
>>
>>it seems to be quite active and 'new'.
>>
>>
>>cheers,
>>
>>Angus
>>
>>
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>>    
>>
>
>
>--
>Ricardo Fabbri
>
>PhD Student in Computer Engineering / Computer Vision
>LEMS - Laboratory for Engineering Man-Machine Systems
>Brown University, USA
>
>
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>  
>
I've understood how to equalize an indexed image after analyzing the 
relationship between RGB and YIQ colorspace. And now the equalized 
result is as same as that in Matlab. My next step is to write a robust 
interface which can equalize the grayscale and indexed images and its 
document.
    I've read the source code of equalize function implemented by 
ImageMagick. Its method is to equalize the R,G,B channels respectively, 
the equalized result in this way contains many extra colors which 
degrade the quality of image. I'll report the bug to ImageMagick.

Thank you for your enthusiastic responses!

Zhang Cheng