Upscaling an image; best way to improve edges?

[Scotter]

Hi. I have a JPG that looks fine at 700px x 700px or so.

But I want to upscale it to 10x that size and fix the edges.

The contrast between the image I want to preserve and the background is good; white on black.

Is there a trace function in Affinity Photo or ... what method do you recommend?

Thanks!

[v_kyr]

Hard to tell without seeing and knowing what "image" concrete means in this context, aka is it a bitmap/raster photo or a B&W graphics drawing in bitmap format etc. and what problem do the edges have?

None of the Affinity products have a bitmap-to-vector tracer build-in, you have to use some third party product here and exchange the trace result data via PDF/SVG.

[Scotter]

Thanks! It's a bitmap/raster image. The edge issue is hard for me to put into words. I guess "aliased"? I'll try that link you shared.

[John Rostron]

I created a few words of text (black on white), then maginified them ten times using Affinity Document > Resize using the default algorithm. The result was remarkably good. I magnfied the same image using PhotoZoom 7 and the result, though acceptable, was not as good as Affinity's.

John