Re: Resizing a larger image to smaller image causesdistortion

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On Thu, Jan 22, 2009 at 5:04 AM, Greg Chapman <gregtutor@xxxxxxxxxxx> wrote:
>
> Hi Ajay,
>
> This is an extended version of my private message! (Should have
> checked my To: address! It's the first time I've posted here! :-) )
>
> On 22 Jan 09 05:29 Ajay Gautam <ajay610@xxxxxxxxx> said:
> > I created this using Gimp 2.6 on Mac 10.5:
> > http://ajaygautam.com/ots-logo.png
> >
> > When I resize this to a smaller image, the text gets all distorted:
> > http://ajaygautam.com/ots-logo-small.png
> >
> > I have been looking around on google, but couldn't find much.
> > Tried scaling with all the different ways (Linear, Cubical... etc).
> > Also tried scaling from XCF and PNG files.
> >
> > Nothing seem to maintain the quality of the text on the image.
> >
> > Any help / pointers in the right direction would be greatly
> > appreciated.
>
> The original is 505x200
> The smaller version 130x51
>
> which appears to be a reduction of 25.74% width and 25.5% height (if
> you reduce width from 505px to 130px - the percentages are different
> if you resize the height from 200 to 51.
>
> The problem is the inevitable rounding of the pixel count that occurs
> given to original size and reduced size.  Ideally, when reducing size
> you should s select resize values that divide to whole numbers and
> things should improve.
>
> I found that doing a 25% percentage resized to 126x50 (which is as
> close as you are going to get to whole numbers with the width being
> 24.95% (Just click in the width and height boxed to refresh them and
> see the actual percentage the pixel count is).
>
> After that reduction, I used the Unsharp mask to help increase the
> contrast. (I selected one side of the image and applied the unsharp
> mask and then the other. This was to avoid darkening the blue side of
> the blue/white boundary)
>
> Part of the reason for the "greying" of the text is that the original
> is anti-aliased which means that when reducing to single pixels
> strokes the resultant image doesn't know whether to go with the
> "shaded" or "pure" colour.
>
> Finally, (working at 800% magnification) I used a 1px pencil tool to
> pick out some of the tops and tails of letters that had suffered badly
> in the reduction. (At this size, where most strokes are now down to a
> single pixel, some of the letters inevitably should fall half way
> between pixels - so you cannot get perfection!)
>
> For a few days you can see my version at:
> http://www.gregtutor.plus.com/otslogo.png
>
> I think I've overdone the unsharp mask on the right side of the image,
> but hopefully it will give you a few clues. With more time it could be
> done better!
>
> In short, you picked a pig of an image to reduce!  :-)
>
> Greg Chapman
> http://www.gregtutor.plus.com
> Helping new users of KompoZer and The GIMP

Greg,

Thanks so very much. The final image you created look way better :)

I cropped the images to 500x200, and resize tool wasn't as brutal.
Will play around more...

Now that you know the desired end result, what would the best way to
go about creating the it, if I were to recreate it from start?

Thanks

Ajay
_______________________________________________

Gimp-user@xxxxxxxxxxxxxxxxxxxxxx
https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user

[Index of Archives]     [Gimp Announce]     [Gimp GUI]     [Gimp Images]     [GIMP Development]     [Video For Linux]     [Photos]     [Yosemite News]     [Yosemite Photos]     [gtk]     [KDE]     [Scanners]     [Gimp's Home]     [Gimp Docs]     [Gimp on Windows]     [Steve's Art]     [Webcams]     [Share Your Images]     [Script Fu]     [GIMP Software]     [GIMP Books]

  Follow Gimp on Twitter