Issue with tracing

[wunksert]

Hi,
I'm getting this issue when tracing simple curved and diagonal lines. Do you have any idea what might be causing this? I went and tried the same image with Vector Magic and it traced the curves and diagonals perfectly so it should be doable.

Thanks!

[András Jankovics]

Hi,

Can you please upload the original image also and your options object/preset? I think the color quantization splits the gradient to two colors: the light purple spots should be the in the same purple shape. This can be fixed by tweeking the color quantization parameters. ltres = 0.01 and qtres = 1 might also help.

[wunksert]

Hi there,

Changing the qtres and ltres and changing the color palette to only 2 colors helped a bit, but it's still not tracing curved or diagonal paths properly.

Here's the new options object I'm using:
var opts = {
pathomit:35, //Changing this to 1 makes the P more jagged
qtres: 0.5,
ltres: 0.1,
numberofcolors: 2
}

Here are the 2 input images I'm testing it on:

And here is the svg output

[wunksert]

HI there, have you been able to make any headway on this issue?

[András Jankovics]

Hi,

I don't see any problem with ImageTracer itself, but I recommend you experimenting with options or doing some preprocessing with another image manipulation program. You can try to remove / flatten the smoothed edges of the letters for example.

I tried these options and got OK results, I'm not sure you can get much better quality from these input images.

W

"sharp"

{"qtres":0.01,"linefilter":true,"rightangleenhance":true,"strokewidth":0}

P

"curvy"

{"ltres":0.01,"linefilter":true,"rightangleenhance":true,"strokewidth":0}

{"ltres":0.01,"linefilter":true,"rightangleenhance":true,"strokewidth":0,"numberofcolors":2}