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Thread: [Award Winner] Bitmapped Images - The technical side of things explained.

  1. #21
      Redrobes is offline
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    Would you like to take the middle image from post #11, take the top left small bit and scale it up very high (800%) and cut out the bit of petal like the others so we can compare ?

  2. #22
      RobA is offline
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    Here is another freeware application that provides a few other enlarging modes:
    http://logicnet.dk/Analyzer/

    Here are some results:

    Wiener 4:
    [Award Winner] Bitmapped Images - The technical side of things explained.-weiner4_resize.png

    Wiener 6:
    [Award Winner] Bitmapped Images - The technical side of things explained.-weiner6_resize.png

    Sinc:
    [Award Winner] Bitmapped Images - The technical side of things explained.-sinc_resize.png

    XinLi:
    [Award Winner] Bitmapped Images - The technical side of things explained.-xinlifractal_resize.png

    Fractal 5 - XinLi:
    [Award Winner] Bitmapped Images - The technical side of things explained.-fractal5xinli_resize.png

    -Rob A>

  3. #23
      Redrobes is offline
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    Thats brilliant Rob. Are you able to edit the post and label them as to what they mean. I have to say I do not think that they are an improvement over ordinary methods tho. The one Mathuwm suggested is critically acclaimed and supposed to be very good indeed so I am curious. It appears I have repped you enough already
    Last edited by Redrobes; 07-29-2008 at 09:00 PM.

  4. #24
      mathuwm is offline
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    resampled with Genuine fractals
    Attached Thumbnails Attached Thumbnails [Award Winner] Bitmapped Images - The technical side of things explained.-colordepth22.png  

  5. #25
      Redrobes is offline
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    I am expecting great things from this super resampler but I cant accept this. This is too good. Is this the small image in the top left of the middle image of post 11 - I have attached it again below. How can it reproduce perfect stamen from a single pixel... tell me this was from a different image !

    Can you do the image attached at 800% or x8 mag ?


    Edit -- I can see that this must have come from top left of post #2 and not post #11. Its still very good but it would be great to have a side by side comparison from the same source.
    Attached Images Attached Images  
    Last edited by Redrobes; 07-29-2008 at 10:27 PM.

  6. #26
      mathuwm is offline
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    the 120x96 pixal image

    No i do not think that would work to well.

    the larger the image the better it upscales

    this program is used a lot for upscaling images for printing on a large format printer

    what i did was take this:
    [Award Winner] Bitmapped Images - The technical side of things explained.-image-size-1.png

    and scale it to this

    I actually cropped it after I scaled it so the actual differences might be slightly off

    [Award Winner] Bitmapped Images - The technical side of things explained.-image-size-2.png
    Last edited by mathuwm; 07-29-2008 at 10:36 PM.

  7. #27
      Redrobes is offline
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    Well the little one is whats being used for all of these samples just so we can compare what a small image resampled would become under different algorithms. Its looks from the dialog images as your using Bicubic in any case - unless it says that when using the Genuine Fractals anyway.

    Just for reference, here is my GTS doing it. I will have to look at the source to see what kind its using. I think its Lanczos tho.

    Thanks for putting the labels on yours Rob. Interesting ringing on the sinc. That looks a bit over the top for a proper sinc tho. I think there might be a coding issue going on in that one. Sinc in a box window will ring a little but that seems a bit too much to be correct.
    Attached Thumbnails Attached Thumbnails [Award Winner] Bitmapped Images - The technical side of things explained.-temp2.png  

  8. #28
      mathuwm is offline
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    [Award Winner] Bitmapped Images - The technical side of things explained.-temp2.png

    ok so here is your tiny image scaled up

  9. #29
      mathuwm is offline
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    small detale[Award Winner] Bitmapped Images - The technical side of things explained.-temp3.png

  10. #30
      RobA is offline
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    A few more with that freebee Image Analyzer I referred to (quite the swiss army knife, really!), using the sample image, enlarged 800%

    Wiener 4:
    [Award Winner] Bitmapped Images - The technical side of things explained.-wiener-4.png

    Two of the fractals (no idea what the parameters do just playing). I got the best results by going x2, x2, x2 rather than straight (the image names include the parameters):
    [Award Winner] Bitmapped Images - The technical side of things explained.-resize_temp-x2-region%3D7-regul%3D0-x2-region%3D7-regul%3D0-x2-region%3D7-regul%3D0.png
    [Award Winner] Bitmapped Images - The technical side of things explained.-resize_temp-x2-region%3D9-regul%3D0-x2-region%3D9-regul%3D0-x2-region%3D9-regul%3D0.png

    And two more from Gimp - progressive resize, 800% in 20 steps:
    [Award Winner] Bitmapped Images - The technical side of things explained.-gimp_resize_steps.png

    and a gimp plugin "smart enlarge" using resyntherizer(?) I enlarged 2x 2x 2x. The first was OK, but after that it certainly added detail, but bolloxed up the image:
    [Award Winner] Bitmapped Images - The technical side of things explained.-gimp_resynth_1.png

    -Rob A>

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