overlayed transparency different results

[ivbera]

Hello

I am working with pdfs and want to have a transparent colored object above it.

The pdf are mostly transparent but have some white areas in it.
The colored object is displayed differently on white planes or on transparent areas.
The results also varie depending on how I placed it.

I expect all white colored areas to be the same color in the blue rectangle.

picture frame and transparancy.afpub

[dominik]

9 minutes ago, ivbera said:

Hello

I am working with pdfs and want to have a transparent colored object above it.

The pdf are mostly transparent but have some white areas in it.
The colored object is displayed differently on white planes or on transparent areas.
The results also varie depending on how I placed it.

I expect all white colored areas to be the same color in the blue rectangle.

picture frame and transparancy.afpub

Hello @ivbera,

for some reason the picture frame in example #3 has a white fill. If you remove the fill it looks the same as #1 & #2.

I assume the PNG in #4 will look the same if you create/export it with a transparent background.

Would this work for you?
d.

[ivbera]

1 hour ago, dominik said:

Would this work for you?

Not really. I work with pdfs for vector reasons.

1 and 2 are also not the result i want. some areas are darker than the others, but effectively it is white and it should be the same.

I think this is a problem to be fixed and not to be work around.

[dominik]

24 minutes ago, ivbera said:

1 and 2 are also not the result i want.

Oh, then I misunderstood your question. Sorry for that.

Hope to see that get fixed.
d.

[Pauls]

I wonder if the png image is a colour conversion issue - do you have the original png

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[dominik]

3 hours ago, Lagarto said:

To avoid the problem, you should export the pdf using some other option than (flatten). You could also add a white rectangle behind all objects to guarantee that you have uniform white background behind all objects. That would let you avoid dependency on viewers and ensure that the background looks the same whether you have transparent or white background in your source images.

That is an interesting advice. I‘ll take that into account for the next time. Thanks.

d.

[ivbera]

@Lagarto You are right. But I still think it is weird for it to display this way and export different.

 

On 7/16/2019 at 5:34 PM, Pauls said:

do you have the original png

Sorry, I was away on a long trip...
It is not a png, but an pdf, I have it attached.

 

7_stadtarchiv_biel_a3.pdf

[Pauls]

if you place the image into an RGB colour format file do you get the result you expect ?

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[ivbera]

Thank you for the explanation. I can work with this.

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