Tilled Bitmap texture create artifacts

larienna · Postby **larienna** » Thu Mar 17, 2011 11:20 pm

I just made some print test and the bitmap texture bug seems also to affect the printed results.

If I use a bitmap as a texture, on screen and once printed, there is an edge that appears around the texture once tilled. Sometimes the artifact are only on one axis, while other times they are on both axis.

Is there a way to prevent this from happening? Here is a sample of the Original file and the printed file. They both show the marks.

Thank You

larienna · Postby **larienna** » Thu Mar 17, 2011 11:21 pm

I just realised that I did not take a shot of the same thing, but it illustrate the bug pretty well.

samigina · Postby **samigina** » Thu Mar 17, 2011 11:48 pm

Same problem here.

Can you report a bug at launchpad?

ivan louette · Postby **ivan louette** » Thu Mar 17, 2011 11:56 pm

This bug was already reported.

If your tiled object doesn't content transparency the joined filter should remove the white lines.

ivan

larienna · Postby **larienna** » Sat Mar 19, 2011 4:20 am

If your tiled object doesn't content transparency the joined filter should remove the white lines.

There is no transparency. I don't understand what is a "Joined filter". Don't remember having a filter with that name.

ivan louette · Postby **ivan louette** » Sat Mar 19, 2011 5:42 am

There is a filter in the document I sent. If you want apply it to your objects do the following operations :

Open your working document which contains the object with white artifacts

Open my file

Open the Filters Editor (Filters/Filters Editor)

Draw any shape in this document and keep it selected

In the Filters Editor click on the check box on the left of the filter name ; that will apply the filter to the shape you drew

Copy this shape

Go back to your working document

Select the object with the white artefacts

Do Ctrl+Shift+V ; that will apply the filter to your object (If you open Filters Editor in your working document it will show the filter applied)

ivan

larienna · Postby **larienna** » Mon Mar 21, 2011 1:47 am

I tried your filter and it seems to work most of the time on the display. I did not test printing yet.

Is there a way I can permanently add your filter in the filter menu of inkscape instead of pasting style all the time. It seems to be a simple color matrix filter.

Else, I need to design the filter and leave it into my default.svg file?

The problem with using paste style is that the original object needs to have the same texture as the target object, else if will copy the fill of the original object.

larienna · Postby **larienna** » Mon Mar 21, 2011 1:59 am

Sometimes, it does not get rid of all the lines. As you can see in the screenshot below, there are still some lines left.

http://lariennalibrary.com/extern/forum ... ture02.png
(Picture also attached at the end)

I made some test to see if when converted to PNG, the same bug occurs. In the PNG file, everything seems clean.

So the only thing left to do would be to make the filter easily accessible. Maybe It could be possible to write an extension. I do not know if it is very hard to do.

ivan louette · Postby **ivan louette** » Mon Mar 21, 2011 4:38 am

Double click on the "1.80" number in the matrix values and increase it to 2 or 5 or 10. If you don't obtain any result that could be because the program which created the tile added a one pixel white or transparent line around. If this is the case open your bitmap tile in GIMP or Photoshop and remove 1 pixel all around, then reload it in Inkscape and recreate your tiled texture with it.

~suv · Postby **~suv** » Mon Mar 21, 2011 4:34 pm

larienna wrote:So the only thing left to do would be to make the filter easily accessible. Maybe It could be possible to write an extension. I do not know if it is very hard to do.

No need for an extension: you can have the filter listed in menu 'Filters > Personal' if that would help. Like with other resources (palettes, icons, key map files, extension, …), you can add custom user resources which are loaded from the user Inkscape profile:

%APPDATA%\Inkscape\filters

[Edit, a day later]

Filters > Personal

stitch.svg

Filters > ABCs > Stitch together

Code: Select all

       inkscape:menu-tooltip="Remove white line between adjacent edges"
       inkscape:menu="ABCs"
       inkscape:label="Stitch together">

[/Edit]

[1] You can enter '%APPDATA%\Inkscape' as string into the address bar of Explorer if you don't know to which path it resolves on your installation. If the 'filters' directory doesn't exist, just create it yourself.

ivan louette · Postby **ivan louette** » Mon Mar 21, 2011 10:17 pm

Thanks for the additional infos ~SUV

Of course this kind of filter will be included in next release.

ivan

larienna · Postby **larienna** » Tue Mar 22, 2011 2:12 am

Thank for the information, Ill try it out.

"Of course this kind of filter will be included in next release."

Well could this be considered as a bug? I don't see any interest to see the lines between textures. So maybe making sure it does not happen in future releases is better than simply making the filter available by default.

~suv · Postby **~suv** » Tue Mar 22, 2011 4:02 am

larienna wrote:Well could this be considered as a bug? I don't see any interest to see the lines between textures. So maybe making sure it does not happen in future releases is better than simply making the filter available by default.

Pattern gaps are well known and long-standing issue in Inkscape's own renderer (Bug #165780) which - from what I have heard - will be fixed once Inkscape switches to using cairo as renderer (Inkscape 0.49 - if all goes well).

ivan louette · Postby **ivan louette** » Tue Mar 22, 2011 7:19 pm

Not typical of Inkscape this is a common bug of programs which display with antialiasing.

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Tilled Bitmap texture create artifacts

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