Hi Nikhil,

I do not know commons-image good enough to answer your questions but 

* Do you mean changing the DPI value (metadata only) or resizing the image? 
* While not related to Apache Commons Image the following link might help - 
https://github.com/sgoeschl/java-image-processing-survival-guide 
<https://github.com/sgoeschl/java-image-processing-survival-guide>

Thanks in advance,

Siegfried Goeschl


> On 3 Mar 2017, at 07:53, Nikhil <[email protected]> wrote:
> 
> Hi,
> 
> 
> 1. Does Commons Imaging support changing dpi of an image ? E.g. Changing
> 1200x1200 image (jpeg / png) to 300x300.
> 
>     If yes, could you point me to a sample ?
> 
> 2. Can Image be converted to grayscale 4 bit or 8 bit using the Imaging api
> ? If yes, could you point me to a sample ?
> 
> 
> Thanks,
> 
> Nikhil

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