Quality of Printed Images  

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Since it is often desirable to get a good quality print on paper directly from the browser, here are the same equations as earlier. This time the `extrascale=' option has been used with a value of 1.5. More than twice the number of pixels are available, for a cost of approximately 1.7 times the disk-space⁵.

  

Figure 3: Displayed math environments with extra-scale of 1.5

1#1 = 2#23#3 + h4#4 + 5#5h ²6#6 + 7#7h ³8#8 + ... 9#9_l,m,n (5)

+ 12#12 = - I_l,m,n(v) (6)

On-screen these images appear slightly blurred or indistinct. However there is a marked improvement in the print quality. The ``anti-aliasing'' helps on-screen; in the printed version jagged edges are indeed softened but leaving an overall fuzziness.

Here are the same equations yet again; this time with `extrascale=2.0'. Now there are 4 times the pixels at a cost of roughly 2.45 times the disk space. Compared with the previous images (having 1.5 times extra-scaling), there is little difference in the on-screen images. Printing at 300dpi shows only a marginal improvement; but at 600dpi the results are most satisfying, especially when scaled to be comparable with normal 10pt type.

  

Figure 4: Displayed math environments with extra-scale of 2.0

1#1 = 2#23#3 + h4#4 + 5#5h ²6#6 + 7#7h ³8#8 + ... 9#9_l,m,n (7)

+ 12#12 = - I_l,m,n(v)  . (8)

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Footnotes

...disk-space⁵

This figure varies with the graphics format used, and the complexity of the actual image.