Texture filtering problem

Khatuni · 09-17-2009, 01:02 PM

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I have a problem with an image that doesn't show up correctly in a programming program. I think it has something to do with my graphics card and/or driver, something with texture filtering.

I made a 320x240 image with MS Paint (naamloos1.jpg, see attachment). The picture I uploaded here is actually twice as large, because I zoomed in. Now when I load this image in the programming program and test it out, it looks like naamloos2.jpg. Some lines are thinner and some are thicker than usual. The program automatically zooms in to 200% as well, as you can see. So that is where it goes wrong.

I am using an Acer laptop now, running on Windows Vista Home Edition, 32-bit. My video card is Nvidia GeForce G 105M and I've recently downloaded the latest drivers. My default screen resolution is 1366x768, it fills the entire screen. But I have this texture problem with any resolution. I thought it might have something to do with "anisotropic filtering", although I don't really know what this means.

I also have an older pc, on which I don't have the problem. That means it cannot be just an issue of the program itself. My old pc runs on XP Home Edition and uses an older Nvidia card. Its default screen resolution is 1024x768 and when I change this, I have some of the problems that I'm experiencing on my laptop now.

Does anyone recognize this problem and/or know a solution for it?
Thanks in advance.

**emosun** · 09-17-2009, 10:15 PM

Most likely a problem with whatever program your using and not the gpu. Might be scaling the image and creating the distortion. Try changing the file format before you import it into the program.

ebackhus · 09-17-2009, 10:23 PM

When going from program to program try using BMP instead.

Khatuni · 09-18-2009, 04:51 PM

The program uses .bmp only. I just converted the .bmp image to .jpg to upload it here.

Maybe Vista handles textures differently than XP does? Could this be a problem here?

**emosun** · 09-18-2009, 11:38 PM

Convert the image to jpeg , then back to bitmap. It should help after it's degraded from being a jpeg a little.

Khatuni · 09-19-2009, 08:47 AM

I still have the same problem after converting to .jpg and back to .bmp. I really think it's the scaling that causes the problem, cause if I have the program picture the image in its normal size, without enlarging, it shows up like normal.

09-17-2009, 10:15 PM	#2 (permalink)
emosun Moderator Hardware Team Join Date: Oct 2006 Location: usa Posts: 6,948 OS: xp pro sp2 My System	Re: Texture filtering problem Most likely a problem with whatever program your using and not the gpu. Might be scaling the image and creating the distortion. Try changing the file format before you import it into the program. __________________ Gpu Benchmarks Cpu-Z Power supply information and selection Gpu-Z Video card quick list

09-17-2009, 10:23 PM	#3 (permalink)
ebackhus Manager, Design Join Date: Apr 2005 Location: SATX Posts: 14,254 OS: WinXP Pro SP3/Windows 7 RTM My System Blog Entries: 28	Re: Texture filtering problem When going from program to program try using BMP instead. __________________ ----------------------------- There are no dumb questions, unless a customer is asking them. Help in the fight against cancer and other serious illnesses.

09-18-2009, 04:51 PM	#4 (permalink)
Khatuni Registered User Join Date: Sep 2009 Posts: 3 OS: Windows Vista Home Edition	Re: Texture filtering problem The program uses .bmp only. I just converted the .bmp image to .jpg to upload it here. Maybe Vista handles textures differently than XP does? Could this be a problem here?

09-18-2009, 11:38 PM	#5 (permalink)
emosun Moderator Hardware Team Join Date: Oct 2006 Location: usa Posts: 6,948 OS: xp pro sp2 My System	Re: Texture filtering problem Convert the image to jpeg , then back to bitmap. It should help after it's degraded from being a jpeg a little. __________________ Gpu Benchmarks Cpu-Z Power supply information and selection Gpu-Z Video card quick list

09-19-2009, 08:47 AM	#6 (permalink)
Khatuni Registered User Join Date: Sep 2009 Posts: 3 OS: Windows Vista Home Edition	Re: Texture filtering problem I still have the same problem after converting to .jpg and back to .bmp. I really think it's the scaling that causes the problem, cause if I have the program picture the image in its normal size, without enlarging, it shows up like normal.