Setting a Specific Resolution to a Certain Size

[Mehak]

Hello,

I need to resize my images to 700 px x 420 px. I can do this, however, I need the images to also have a resolution of atleast 738 x 446. I am not able to figure out how to set it to atleast this resolution on the software. Please help me out as soon as possible.

Thank you.

[Komatös]

Hi @Mehak and welcome to the forums.

In Affinity Photo you can do this via the menu Document > Resize Document...

[NotMyFault]

4 hours ago, Mehak said:

I need to resize my images to 700 px x 420 px. I can do this, however, I need the images to also have a resolution of atleast 738 x 446.

How do you define resolution?
usually it is the DPI setting, meaning how many px are used for one inch. Affinity can use only one fixed resolution number both in x and y direction. 
We need the physical unit for the given numbers 738, meaning cm, inch, etc. 

 

[Alfred]

4 hours ago, Mehak said:

I need to resize my images to 700 px x 420 px. I can do this, however, I need the images to also have a resolution of atleast 738 x 446.

The picture resolution (i.e. the pixel dimensions of the image) must be either 700 x 420 or 738 x 446. You clearly cannot have both at the same time.

[Old Bruce]

You'll need to use a physical distance, not a pixel distance, for the units of measurement for the "resized" export. If your document has 72 DPI/PPI and you are using Inches as your Units of Measurement. And your original is 738 pixels then the physical size is 738/72 = size in inches. If your original document has 300 DPI/PPI then the arithmetic is 738/300 = size in inches.

700/72 = 9.722222222 inches

700/300 = 2.33333333 inches

[thomaso]

7 hours ago, NotMyFault said:

meaning how many px are used for one inch. Affinity can use only one fixed resolution number both in x and y direction. 

… for export (resulting in squared pixels). – For objects within an Affinity document, the effective resolution ("Placed DPI") can vary and does not have to be identical in the x and y directions.

Nevertheless, @Mehak, your two sets of dimensions don't have the same aspect ratio. Thus additionally to scaling the smaller size would require slightly stretching to achieve the larger size.

What export file type do you want to use? If you indeed want to create an image file with two different image sizes (on two separate Layer layers) you might choose TIF for instance with its Layer option ticked. To access the two layers separately you would need an according application (e.g. a web browser would not work and display the two layers flattened as just one, if ever).

[NotMyFault]

45 minutes ago, thomaso said:

For objects within an Affinity document, the effective resolution ("Placed DPI") can vary and does not have to be identical in the x and y directions.

I was referring to "document DPI", not layer DPI. The OP is most probaly  concerned about export size, so layer DPI is irrelevant here.

[thomaso]

7 minutes ago, NotMyFault said:

I was referring to "document DPI", not layer DPI. The OP is most probaly  concerned about export size, so layer DPI is irrelevant here.

I know you know. – But the OP's info is rather vague so I mentioned that aspect 'just in case'.

From the pure description it even might mean to create an Affinity document with a "Specific Resolution" and two image layers, each scaled to one of the two wanted pixel dimensions as their "Certain Size".