Hi Anthony,
I tried this loop to find out a good fuzz value but either it doesn't mask
the shadow or it mask too much (include part of face)
for fuzz in 01 03 06 28 32 34; do \
convert diff.png -fill blue -fuzz $fuzz% \
-bordercolor black -border 1x1 -floodfill +0+0 black \
-shave 1x1 diff_mask_$fuzz.png; \
done
Could you make an example with splitting the image in two sections?
Greetings
On Fri, Aug 22, 2008 at 10:09 AM, Kyrill <[EMAIL PROTECTED]> wrote:
> Hi Anthony,
>
> Thanks, I will try to do that what you wrote. (and hopefully figure out the
> right parameter/values)
>
> Greetings
>
>
> On Thu, Aug 21, 2008 at 8:22 AM, Anthony Thyssen <[EMAIL PROTECTED]>wrote:
>
>> Kyrill on wrote...
>> | Hi all,
>> |
>> | I'm working on a script that removes the background from pictures.
>> | The problem is on pictures with shadow, it doesn't remove the shadow.
>> |
>> | Any idea how I can remove the shadow too?
>> |
>> | Here the steps that I use for removing the background:
>> |
>> | Original File
>> | http://img179.imageshack.us/img179/255/origke7.jpg
>> |
>> | Difference
>> | http://img170.imageshack.us/img170/3316/diffih5.png
>> |
>> | Threshold
>> | http://img170.imageshack.us/img170/7930/thresholdhi5.png
>> |
>> | Image without background but with shadow
>> | http://img186.imageshack.us/img186/5355/outhb7.png
>> |
>> | If you need more information, let me know.
>> |
>> Your shadow will make it very very tricky to do background
>> removal, but not imposible.
>>
>> You may be better to split your image into two sections. The first to
>> handle the unshadowed background, the cecond to remove the shadowed
>> background.
>>
>> That is a two color background removal.
>>
>>
>> Note however that a simple 'theshold' background removal will produce
>> some horible aliased edging effects, especially in the hair.
>>
>> I suggest you look at the double 'fuzz' method given in IM examples
>> Masking with Anti-Aliased Edges
>> http://www.imagemagick.org/Usage/channels/#mask_antialised
>>
>> This should let you remove the background as retain or remove the
>> shadow as you wish!
>>
>> You still may need to remove the two backgrounds separatally for better
>> results.
>>
>> Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
>>
>>
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>> http://www.cit.gu.edu.au/~anthony/<http://www.cit.gu.edu.au/%7Eanthony/>
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>
>
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