Affinity Photo pixelates small resized pictures

[pedroterrero]

Hello, I'm new to this forum. Sorry if I don't post all the required information.

When resizing a small pasted picture, if I try to make it bigger, Affinity Photo pixelates it, losing quality. I tried resampling, rasterizing and exporting with Bicubic, Bilinear, Lanczos resampling and nothing works.

This is the original picture:

This is an example of a good resizing and resampling using IrfanView (I know the original picture is veeery small, but it's what I have):

 

And this is what Affinity Photo does, no matter how I resample the document, or the exported picture:

Is there anything I'm doing wrong? And is there any way to default resampling with a better quality filter? I'm on Affinity Photo 1.8.3.641 (W10).

Thank you in advance.

[John Rostron]

Are the images you show here the actual images as saved? Or are they screenshots? If they are screenshots, were they taken with the image display at 100%?

Screenshots at less than 100% can often seem pixellated.

John

[pedroterrero]

1 minute ago, John Rostron said:

Are the images you show here the actual images as saved? Or are they screenshots? If they are screenshots, were they taken with the image display at 100%?

Screenshots at less than 100% can often seem pixellated.

John

Screenshots without resizing. It's the actual size of the three pictures. As you can see, even though they are screenshots the quality varies. Better resampling in the photo resized with IrfanView, inexistent resampling in the second one (AP).

[John Rostron]

40 minutes ago, pedroterrero said:

Screenshots without resizing

For a valid comparison, you need to display the image on your screen at 100%.

John

[pedroterrero]

1 hour ago, John Rostron said:

For a valid comparison, you need to display the image on your screen at 100%.

John

It works fine in my desktop PC 🥴, but the exported picture in my laptop was exactly like the third picture I posted, so it seems to be hardware-related. 😓 Anyway, you can see it in action inside the program if you do like this:

1. Open Affinity Photo
2. Create a new document. FHD 1080p is fine
3. Copy the first picture I posted and paste it into the blank document
4. Resize it to fit the canvas
5. Zoom in the document with Ctrl+scroll. You will see the image is pixelated. It should be fine as we are still working on it, although I would like to see an option to get best quality, like a "best quality" 

[Pšenda]

Image Layer or Pixel Layer? Before resampling picture must be rasterized.

Image Layer after "resize". (Image Layer is single object with still same resolution).

Pixel Layer after "resample".

 

P.S. Open APhoto, New from Clipboard (your image), Rastarized, menu Document\Resize Document\Size = 1920.

[John Rostron]

You still have not said if you are viewing at 100%.

I downloaded your first two images. I cropped the first to approximate the shape of your second one, and then used Document > Resize to enlarge it by 300% using the Lanczoz 3 algorithm. This produced an image approximately the same size as your second, close-up image. I viewed each of these at 100% and took screenshots of each, including the tab showing the display size.

Here is your closup (enlarged by yourself):

And here is my cropped and enlarged version of your original enlarged in Affinty:

You can see that the enlargement is not perfect in that there are haloes visible, but there is no sign of pixellation.

For comparison, here is the image enlarged in PhotoZoom:

John