I've drawn a picture in paint and when I print it it's quite pixelated. I want to put an antialiasing filter on it but I don't know how to do that.
Please help. Thanks.
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DaVince This fool just HAD to have a custom rating
Registered 04/09/2004
Points 7998
18th August, 2007 at 05:03:33 -
Get something like Irfanview (www.irfanview.com ) and change the picture's DPI (dots per inch) setting, which is intended for how many pixels are drawn at how many inches. (In Irfanview, the DPI can be found in the picture resize dialog.)
I tried that, but DPI only changes how many pixels are going to be printed in that inch and doesn't have anything to do with smoothing the edges of a bitmap. I'm not too concerned about the printing aspect at the moment. I just need the edges smoothed.
Is anyone a wizard here at photoshop and would maybe know how to smooth jaggered edges in that?
MMF's one only blurs the edges.
There isn't any good anti aliasing technique after the image was already rendered (Drawn in this case) other then pixel by pixel.
Is there say an algorithm that will anti-aliase a bmp. Kind of like the same way hq2x works with enlarging a picture.
I mean it couldn't be that hard. Someone the net must have made such a thing before.
No, no, no. I have that program already, it's good so thanks. But that resizes the image. I need somthing that will smooth my image. Because all the pixels are very pixely, and I need them smoothed out so you can't notice them.
The first one way won't do anything other then one anti aliasing proccess.
The way second will do more detailed anti aliasing.
Basiclly, Resizing by *4 is enough.
Ok. First of all, to all intents and purposes blurring and antialiasing are the same thing. Each pixel colour is based on a weighted average of the original pixel and it's neighbours' colours.
What you actually want to do will depend on the type of image you want to print. Assuming it's a line drawing such as the one in your example, you want to use a filter such as the HQ filters (as you seem to have realised). These work in a very different way, looking for lines (ie. vectors), which are obviously easy to scale. If your image is like the one below it may even be possible to use a tool to convert it to a vector image which would be ideal.
So, as others have suggested, you should just need to keep enlarging the image. For printing though, you should not be shrinking it down again - the higher the resolution the better.
The other possibility you may have overlooked is your printer driver. There may be options inside the print setup than affect how the imge is scaled.
You're defiantly wrong here.
Anti Aliasing might use a kind of blur, but it's NOT a blur method.
Anti aliasing makes an image not too contrast-y on the edges by different methods.
For Vector images for example, the image is drawn on a 4 times bigger surface and then being resized with resampling. This also explains Flash's quality modes - Low doesn't antialias, Medium resizes by 2 and High by 4.
The method of using HQ filters is something very similar too.
In both cases, the "filter" will not blur lines which are straight on the X and Y axises.
To show what I explain, I made this image:
Some other AA-ing filters may give better results.
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