Jump to content

Affinity Photo - Resize image without quality loss


Recommended Posts

14 minutes ago, MepMeeep said:

I try to resize an jpeg image. I open it with Affinity Photo and want to create an image size 12x17cm. But when I choose document > resize document and give the new size in px, the image is resize but the quality is very bad. Why does it not resample the image?

What was the original size in px of your jpeg file, before you did the resize? What resample method did you choose? Can you provide some screenshots?

 

-- Walt

Windows 10 Home, version 20H2 (19042.685),
   Desktop: 16GB memory, Intel Core i7-6700K @ 4.00GHz, GeForce GTX 970
   Laptop (2021-04-06):  32GB memory, Intel Core i7-10750H @ 2.60GHz
, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU
Affinity Photo 1.9.2.1035 and 1.9.4.1065 Beta   / Affinity Designer 1.9.2.1035 and 1.9.4.1065 Beta  / Affinity Publisher 1.9.2.1035 and 1.9.2.1024 Beta

Link to post
Share on other sites
51 minutes ago, MepMeeep said:

from 3024 px x 4032 px and 72dpi to about 12cm width which is 340px x 453 px with resambling bilinear

3024 x 4032 px @ 72dpi would be about 42 x 56 inches (or about 107 x 142 cm).

What you did was to drastically reduce the pixel count. You reduced the total pixel count to about 1% of what it originally was if I've done the arithmetic correctly. That cannot possible maintain the same sharpness.

If you wanted your image to have a 12cm width you could have simply changed the dpi value while keeping the number of pixels constant. A dpi value of 600 would do that. (Or, you could cut the number of pixels in half (approximately 1500 in width) at a dpi of 300.)

-- Walt

Windows 10 Home, version 20H2 (19042.685),
   Desktop: 16GB memory, Intel Core i7-6700K @ 4.00GHz, GeForce GTX 970
   Laptop (2021-04-06):  32GB memory, Intel Core i7-10750H @ 2.60GHz
, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU
Affinity Photo 1.9.2.1035 and 1.9.4.1065 Beta   / Affinity Designer 1.9.2.1035 and 1.9.4.1065 Beta  / Affinity Publisher 1.9.2.1035 and 1.9.2.1024 Beta

Link to post
Share on other sites
52 minutes ago, MepMeeep said:

@walt.farrell this works. Thanks. But why do I have to do this manually. In photoshop if I resize the image it works automatically?

Photoshop isn’t doing this as automatically as you might think. Affinity Photo is managing the image with very similar tools, but you may not be as familiar with them. You simply need to give it the DPI that you want in the final result. If you uncheck a box or two in Photoshop, it would do the same thing.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

Please note there is currently a delay in replying to some post. See pinned thread in the Questions forum. These are the Terms of Use you will be asked to agree to if you join the forum. | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.