how to remove texture aliasing .. ? Anti-aliasing techniques required..

luckyyyyyy · 2011-10-14T06:53:24

Hello guys.. Kindly guide me how can I remove image aliasing in OpenGL... I am projecting the image on the object, the model should look like as it is. but we can see the aliasing jumps on the given image. Kindly observe the attached image and tell me how can I apply anti-aliasing on this kind of image. I have also tried following techniques using glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST_MIPMAP_LINEAR); #define GL_NEAREST 0x2600#define GL_LINEAR 0x2601#define GL_NEAREST_MIPMAP_NEAREST 0x2700#define GL_LINEAR_MIPMAP_NEAREST 0x2701#define GL_NEAREST_MIPMAP_LINEAR 0x2702#define GL_LINEAR_MIPMAP_LINEAR 0x2703etc etc. Is there any other technique to remove these aliasing jumps.. ? Thanks.

Graphics and GPU Programming Programming OpenGL

Started by luckyyyyyy September 25, 2011 03:55 PM

10 comments, last by Nik02 12 years, 6 months ago

luckyyyyyy

145

Author

October 13, 2011 01:53 PM

I studied some material and came to know that in this way I can get the highest quality texture. Am i right?

glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_LINEAR_MIPMAP_LINEAR

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );

	glTexParameterf(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);

	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

	+

 	glEnable(GL_MULTISAMPLE_ARB);

If the quality/smoothness can be further improved/enhanced then comments will be appreciated. Thanks.

Nik02

4,359

October 14, 2011 06:53 AM

If you want more fidelity than the standard texture filters can provide, you could look into writing a fragment shader that performs higher-order filtering (such as cubic). This will affect the texturing performance, though, because such a shader would need to take multiple filtered samples from the texture to produce one output. That said, the shader is not incredibly complex either so modern hardware can cope with it just fine.

The book "GPU Gems 2" (Nvidia) has further information on this.

Niko Suni

how to remove texture aliasing .. ? Anti-aliasing techniques required..

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