cekuhnen Posted February 23, 2017 Share Posted February 23, 2017 It seems that the rasterize command is based on the document DPI setting. Is there a way to rasterize an object in a 150 DPI document with lets say 300 DPI? Quote Claas Kuhnen Faculty Industrial Design - Chair Interior Design - Wayne State University Owner studioKuhnen - product:interface:design Link to comment Share on other sites More sharing options...
Staff Leigh Posted February 27, 2017 Staff Share Posted February 27, 2017 It seems that the rasterize command is based on the document DPI setting. This is correct and it's not currently possible to specify the DPI when using Rasterize - other users have asked for this feature to be added in the future. Quote Link to comment Share on other sites More sharing options...
cekuhnen Posted March 4, 2017 Author Share Posted March 4, 2017 This is correct and it's not currently possible to specify the DPI when using Rasterize - other users have asked for this feature to be added in the future. so when the document DPI is set to 600 or 72 the image will be rasterized with 600 or 72, right? I ask because it sees it is always the same DPI for the rasterized image result. Quote Claas Kuhnen Faculty Industrial Design - Chair Interior Design - Wayne State University Owner studioKuhnen - product:interface:design Link to comment Share on other sites More sharing options...
R C-R Posted March 5, 2017 Share Posted March 5, 2017 so when the document DPI is set to 600 or 72 the image will be rasterized with 600 or 72, right? Sort of. DPI does not have much meaning unless you are printing out something (other than to define a default "actual size" for the document). The Affinity Photo - Understanding DPI video tutorial may help explain when DPI is important & when it is not. Quote All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 Affinity Photo 1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7 Link to comment Share on other sites More sharing options...
cekuhnen Posted March 6, 2017 Author Share Posted March 6, 2017 Sort of. DPI does not have much meaning unless you are printing out something (other than to define a default "actual size" for the document). The Affinity Photo - Understanding DPI video tutorial may help explain when DPI is important & when it is not. DPI has a lot to do even when not printing but delivering PDF documents. A low res vs a high res image in a PDF will show. Quote Claas Kuhnen Faculty Industrial Design - Chair Interior Design - Wayne State University Owner studioKuhnen - product:interface:design Link to comment Share on other sites More sharing options...
R C-R Posted March 6, 2017 Share Posted March 6, 2017 DPI has a lot to do even when not printing but delivering PDF documents. A low res vs a high res image in a PDF will show. DPI is not a measure of a digital image's resolution. That is determined only & completely by its pixel dimensions. DPI is related to the resolution of a print (its sharpness), but that is not the same thing. See for example, this discussion or this more comprehensive one. Quote All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 Affinity Photo 1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7 Link to comment Share on other sites More sharing options...
v_kyr Posted March 7, 2017 Share Posted March 7, 2017 Though there are two related, but little historical exceptions from this for some other devices beside screens and printers ... Scanners typically scan a template by a grid method, line and point. From the history, the scanning density is expressed in dots per inch (dpi) because it was used almost exclusively in the prepress and for a later print. Scans are usually based on pixels so that the unit "ppi" is used. Computer mice, the number of detectable minute single steps per unit length is given to indicate a "guiding accuracy". The common unit is dpi or ppi ("pulses per inch") because it is related to steps rather than pressure points. Other than the above, it's mostly always PPI vs DPI like this... Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
R C-R Posted March 7, 2017 Share Posted March 7, 2017 Other than the above, it's mostly always PPI vs DPI like this... Except that for both computer displays & printed documents the pixels or dots are most often composed of smaller elements, like LED triads for flat panel displays or microfine ink blobs that blend together in inkjet printing. And since software & device drivers can & typically do display an anti-aliased version of the image at various magnification (zoom) levels on screen, or often print it at other than the "native" DPI setting, there is rarely any direct 1:1 correlation among image pixels, display pixels, & printed dots. Quote All 3 1.10.8, & all 3 V2.4.1 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7 Affinity Photo 1.10.8; Affinity Designer 1.108; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7 Link to comment Share on other sites More sharing options...
v_kyr Posted March 7, 2017 Share Posted March 7, 2017 The term "dpi (dots per inch)" initially stems and is usually associated with the printing/prepress domain. Computer screens initially here instead in pixels. Though technology has of course be enhanced over years for printers and nowadays LCD screens and thus things got slightly finer in gradation over time. However, sometimes terms like "dpi" etc. are often mismatched used by some resources for other contexts too, which then probably leads to confusion or misunderstandings! Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
anon1 Posted March 21, 2017 Share Posted March 21, 2017 It seems that the rasterize command is based on the document DPI setting. Is there a way to rasterize an object in a 150 DPI document with lets say 300 DPI? also the interpolation algorithm needs to be changed, preference to adjust see here https://forum.affinity.serif.com/index.php?/topic/21222-rasterizing-algorithm/ Quote Link to comment Share on other sites More sharing options...
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