"Low-res" JPGs get blurry during editing

Alex Petrov

• 5. Mai 2020 09:08

Hi there,

I just started using CaptureOne for Sony and I have no issues when I edit JPGs or ARW (RAW) files from the camera. But I have an issue when I edit relatively small JPGs (I tested up to 1920x1080) they get awfully blurry and look like a heavily upscaled low-res image when you're moving any slider (exposure, contrast, etc) and stay like that for a second or two when you stop adjusting any setting. Just as if it had some 200x200 preview to show during the processing of the adjustments.

I have everything on default (Preview image size = 2560px), I have 8-core Ryzen, and GTX1060 with hardware acceleration ON. And again, when I edit hi-res JPGs from the camera, the response is instant.

I was hoping to use CaptureOne for editing and organizing images for the web which are almost always less than 2k. How can this be fixed? It distracts and irritates a lot.

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  Alex Petrov

  • 7. Mai 2020 04:53

  Hey Walter. This is actually not the case. I am referencing images which are both smaller and larger than the viewer window. If the image is smaller than the view and it’s at 100% scale - it’s sharp but as soon as you start moving any slider like exposure etc, it gets blurry and pixelated while you’re moving it and corrections are calculated, and after a second or two after you stopped moving it, it gets sharp again.

  The same thing happens with larger images: I’m using a FullHD monitor and even if I take an image of 1920x1080 and view it at 100% scale or fit it to the viewer, it looks sharp until you start moving any slider.

  I didn’t notice anything like that with larger RAWs and JPGs from the camera (6000x4000 or something)

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  Class A

  • 10. Mai 2020 07:52

  I know the effect you  are describing. It occurred with version 10 when I set the preview image size to low values in order to force C1 to prepare proper previews. With large preview sizes, C1 apparently scaled those down to the actual viewer dimensions, resulting in pretty blurry previews. Setting the preview size lower than the viewer dimensions forced C1 to actually render a preview targeting the viewer dimensions. This made the previews sharper but had the negative side effect of blurring the image during editing operations (which might have reverted back to using the original preview instead of using a cached version of the dedicated render).
  
  Although my case was different, you may want to experiment with the preview image size. Note that you should manually regenerate the preview image; just changing the dimensions in the preferences won't have an immediate effect. I don't have much hope but perhaps you get lucky against my expectation.

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