Publisher Resource Manager dpi Issues

[Studio8]

Hi

I normally place 72dpi jpg images into doc for placement and then when all is approved I convert to 300dpi (Resample unticked) CMYK tifs for print and then update in Publisher. When I try and do this in Publisher and go to Resource Manager and click update it still says the image is 72dpi in the right hand info bar.

I'm having to physically re-place each image to make it then show up as 300dpi.

Am I missing something here?

Thanks

Stu

[larsh]

Hi, may be I don´t understand it. From 72 dpi pics to 300?

If in Pub the pics are set, save. Then Quit Pub and delete all 72 dpi pics out of the folder. Copy the same files with the same file names but 300 dpi into it. Start the Pub apub again. If the pics in the publication are changed now, go to Ressource M. mark all pics and click actual. May be... lars

[Studio8]

Thanks Lars

Yeah, so my jpg is 132x198cm - 72dpi. I convert to 300dpi (resample unticked) which brings the file to 31x47cm - 300dpi. Something I've always done for print jobs.

Tried your way and still says 72dpi in preview box (see attached one file). If I place the image in afresh it shows as it should, 300dpi.

Confusing the hell out of me, maybe Affinity can help?

Thanks

Stu

[larsh]

Hi, to hard for me (my english). If a pic with 300 dpi has 240x160 mm and the frame in the apub has the same the Pl. D. is 300, if the pic has more and moved together as the frame is there is written, may be 315... The pics total dpi, say 6.000 x 4.000 px (in 300 or 72 dpi), is what is importend. So with 1.702 you can print and Pub will make it as 300 dpi. If it is less as 300 the printers machine will make pixels. Update is what I called actual. Replace is to change only one pic. But you should cry for more help! lars

[R C-R]

7 hours ago, Studio8 said:

I normally place 72dpi jpg images into doc for placement and then when all is approved I convert to 300dpi (Resample unticked) CMYK tifs for print and then update in Publisher.

I am probably missing something important, but why do this in Publisher? Neither the pixel resolution (number of pixels) nor the file size is changed by changing the DPI of the placed file, as you can see from your Resource Manager screenshots. That is how placed images work -- they retain their 'native' resolution so they can be resized in the document without the need to resample them or otherwise alter their pixels, much like vector objects.

IOW, what do you want to accomplish by doing this?

[Studio8]

So i place supplied images into publisher at 72dpi (as that is how client supplies). When the client is happy with the design (they have a habit of changing imagery and sending new imagery etc) I go back and make all my images used in the document to 300dpi CMYK tifs in Photo (or previously photoshop) as I design for print. I'm new to Publisher so in Indesign I just used to update or replace and all seemed to work great.

It might be that what I'm doing is ok and it will work but I want to make sure. I don't get why I change dpi in affinity photo, relink or replace in publisher and it still says 72dpi on right hand info panel. If I place the image in from scratch it says 300dpi (as in screenshots 1 and 2 on previous post).

[thomaso]

I assume you do an unnecessary step. As you can see in your 2 screenshots, no value of the image has changed than its original DPI. All its
– Original size
– Places size
– Placed DPI
are the same in both situations. Actually this "Original DPI" has neither influence on the export result nor the image content size or quality at all. Instead the images pixel dimensions are relevant.

Actually you even may ignore the documents resolution in AfPub because the export resolution is set in export settings.

Not going that additional step – to change the image DPI without resampling – also has an influence of the size of images at the moment of placing them, because their size is related to the document resolution. Therefore it can be easier for you, to place images which have the same resolution as the document, because otherwise they might appear smaller or larger on page at first and make you scaling them. It just depends in what document resolution you are working to get with click on the button "Original size" the image scaled as you expect it. Unfortunately AfPublisher always and only sees that size of an image as "Original" which results in exactly the same placed DPI than the Document dpi. So, simply by changing document DPI you can achieve that images you are going to place will appear in the wanted size on your page without a need to scale them.

 

[Studio8]

Thanks Thomaso

I think I'm getting my head around this now slowly, bit of a learning curve from 15 years in indesign but I'm liking the Affinity.

I'm still not sure why

1. Image 1, displays the original image as a 72dpi jpg

2. Image 2, I replace (or update if I delete the original jpg) with the tif CMYK 300 dpi, yet it still says 72dpi on the right hand side (circled)

3. Image 3, If I completely place the image in again from scratch (ie command shift M) then it shows it as 300dpi correctly on the right (circled)

Maybe I just ignore this, is this a glitch in the software? I think what you're saying is Publisher remembers the original image was 72dpi and keeps that displayed even though its actually a 300dpi image, either way as long as it doesn't impact on my print then I'm ok, I just didn't get it.

Incidentally the Publisher document res is 300dpi as well.

Thanks all

 

 

 

[R C-R]

2 hours ago, Studio8 said:

Maybe I just ignore this, is this a glitch in the software?

No glitch, just how placed images work in Affinity Publisher. Notice that in all 3 Resource Manager screenshots, the Placed DPI, the Original size, & the Placed size are each the same. The Original DPI does not affect them at all. That is because the images are placed at whatever size (in document pixel dimensions) & DPI you choose when placing them.

Earlier, you said:

3 hours ago, Studio8 said:

So i place supplied images into publisher at 72dpi (as that is how client supplies). When the client is happy with the design (they have a habit of changing imagery and sending new imagery etc) I go back and make all my images used in the document to 300dpi CMYK tifs in Photo (or previously photoshop) as I design for print

It sounds like you are saying the client supplies images in JPEG format? If so, when you convert them to TIF files, are you enhancing them in some way, or doing anything other than changing their color space to CMYK  & to a different ICC profile?

If you are not doing anything else, then the exported results should be the same whether the originals were JPEGs or TIFFs. Have you tested this & gotten different results? If so, what are they?

[thomaso]

2 hours ago, Studio8 said:

15 years in indesign

Then you are trained to ignore document resolution, aren't you? An .indd simply has no resolution itself, only the objects inside the document count.

2 hours ago, Studio8 said:

Maybe I just ignore this, is this a glitch in the software?

Yes, ignore it. It's possibly an update issue with the "Replace" action. – Just the pixels mentioned above make the lot.

Since you have set your document DPI to 300 then you might have noticed that 72 dpi images get placed quite small – whereas a new placed 300 dpi image with same pixel dimensions gets placed larger and probably in the size you imagine before placement, right? So you can use the document DPI to influence the first size of a placed image. Document resolution in AfPub has no influence on output quality – unless you rasterize a vector object within your .afpub.

 

[Studio8]

Thanks guys

Thomaso, yes I was surprised to see why Publisher and Designer give you document dpi options to be honest, never had to do that in Adobe.

R C-R I change to FOGRA39 profile and quite often adjust levels/sharpness etc.

Thanks again for your guidance.

[thomaso]

ps. In fact, the Affinity apps use document resolution to prepare for the user rasterizing a vector object – a step you can not do in ID.
Only in the case of rasterizing does the vector object need to know a scale to obtain its pixel dimensions. In such a case, a higher resolution results in more pixels of the rasterized item.

pps: Note that each time you convert to another profile, the colors must be changed to fit the new profile. In this way, you possibly force some colors to get a little different values than before the profile change. This will not do much harm, but it's not very useful, especially if you then place the image in an .afpub, which also has a profile: If that's different from what you applied to the image, you'll achieve a further color shift / If the .afpub profile is the same as in the image, you do not have to assign or convert the profile in the image, but can let it run directly from AfPub.

Last thought: You may have noticed that your original JPG has a file size of about 1/6 of your later TIFF. If you want to save disk space, you can stay with JPG at a compression / image quality of 10 (out of 12) or 8 (of 10) with no visible loss. To compare the impact of the JPG compression rate and file size have a look at this site of Jeffrey Friedl: Just scroll to an image and hover over the different compression rates to compare details / loss and file size simultaneously:

http://regex.info/blog/lightroom-goodies/jpeg-quality