Author Topic: PNG looks good in preview but terrible in PDF output  (Read 282 times)

founder

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PNG looks good in preview but terrible in PDF output
« on: July 06, 2018, 10:24:19 am »
I have attached PNG graphics which look good on the screen, but complete unuseable in the PDF output.

The PDF output looks like 2 colors black and white and lower resolution.


a.l.e

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Re: PNG looks good in preview but terrible in PDF output
« Reply #1 on: July 06, 2018, 11:54:10 am »
the pictures are really small!

if you're printing them at a size bigger than 1 or 1 1/2 cm you will get a really tiny resolution!

utnik

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Re: PNG looks good in preview but terrible in PDF output
« Reply #2 on: July 06, 2018, 11:57:19 am »
hi founder   

your .png files look good as long as you show them in small scale.depending on the preferred print resolution you may use them in post stamp size. with 200 ppi the length of the tesla will be around 4 cm (1.65"). for high resolution prints it will go down to sess than  2.5 cm (1").
you might need better images for your project.   

utnik

founder

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Re: PNG looks good in preview but terrible in PDF output
« Reply #3 on: July 06, 2018, 12:38:27 pm »
Here a screenshot from the produced PDF.

It looks terrible compared to the original pictures.

utnik

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Re: PNG looks good in preview but terrible in PDF output
« Reply #4 on: July 06, 2018, 12:49:44 pm »
hi founder   

the low resolution is from the source file.but you might have exported to a .pdf version without support for transparencies (1.3, x/1-a or x/3)…   
either you use .pdf 1.4 or higher or you have to reduce the transparencies in an image editor.   

utnik

founder

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Re: PNG looks good in preview but terrible in PDF output
« Reply #5 on: July 06, 2018, 02:15:46 pm »
hi founder   

the low resolution is from the source file.but you might have exported to a .pdf version without support for transparencies (1.3, x/1-a or x/3)…   
either you use .pdf 1.4 or higher or you have to reduce the transparencies in an image editor.   

utnik

Thanks, that was the solution, just created the PDF as 1,4 and it looks now fine.

 

palmate