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I have been given the task to take graphs and vector them to make them be able to scale up and down. Every time I live trace it, it comes out blotchy and I cant get it to remain someone crisp. I cam easily make the number increments out side of the graph easily but the information inside is very complicated to just try and recreate using the pen tool or anything

enter image description here

enter image description here

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  • Seems as though you know the answer.. no tracing, use the pen tool and draw.. it just won't be easy.
    – Scott
    Mar 3 '18 at 6:08
  • Do you have the original data? I mean not just a image?
    – joojaa
    Mar 3 '18 at 7:34
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    To make the Trinity complete, I say: There's no problem (tried and saw) with the tracing if you allow some error, say max. 1 pixel displacement when compared to your image and the visual appearance is = no error, when zoomed to fit the screen. Do you accept it? Only filter out the JPG artefacts before tracing. NOTE: Your curves are about 1 pixel wide black and white without any smoothing., like staircases. Graphic software tracing cannot find a smooth zero width curve which can be considered to be the right form of the original. Exactly traced curve is a replica of your image
    – user287001
    Mar 3 '18 at 8:57
  • It has no sense at all tracing that image! That image, in any case, should be re-generated with the original data.
    – Rafael
    Mar 5 '18 at 18:39
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To be honest, I think you have been sent on a fools errand. Auto tracing that image will never look good.

As for scaling it, there is no problem. The image is a bitmap with solid pixels. This could easily be rescaled in Photoshop using Nearest Neighbour (preserve hard edges) as the interpolation method.

For example, here's an enlargement of just one small section. Click on it to see it full size.

enter image description here

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