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Text problem

Mar 27, 2012, 22:06
Post: #1
Text problem
I've been experimenting with large font sizes on a base image of 2000x3000 pixels. I've been using a basic white type face on a dark gray background and adjusting the lightness and contrast of the white color to different levels. Also, I created the type as as png first and then brought into Gimp. When the image is at full size, the type looks fine, but when I shrink the image down, say a quarter of the size, the edges of the fonts get very jagged and look like they're breaking up.

is there a way around this?

Thanks!
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Mar 27, 2012, 22:40 (This post was last modified: Mar 27, 2012 22:44 by ofnuts.)
Post: #2
RE: Text problem
The mysteries of spatial frequency folding... If you downscale N times, apply a Gaussian blur of N pixels before scaling down. In the image below:

- Create 1600x1600 image
- Add G in 1600px font
- Remove text info from layer
- duplicate layer
- Gaussian blur 4px one of the G's, leave the other alone
- Scale down image 4x (25%)
- resize canvas and move layers to compare them side by side
- I'll let you guess which one was pre-blurred Smile

[attachment=1051]

The pre-blur can be applied to the whole image. Actually it *should* be applied to the whole image even if it is more necessary when the image contains regular patterns close to a multiple of the scaling down (tiles, fabric... and anti-aliasing pixels on sharp borders)

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Mar 27, 2012, 23:20
Post: #3
RE: Text problem
It seemed to work! Thank you! I think you are a genius!
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Mar 27, 2012, 23:39
Post: #4
RE: Text problem
(Mar 27, 2012 23:20)steve6 Wrote:  It seemed to work! Thank you! I think you are a genius!
Ain't me... it's all explained there: http://en.wikipedia.org/wiki/Nyquist%E2%...and_images

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