Re: [osg-users] 16 Bit Image
Hello Ulrich, yes, the depth = 4 for RGBA, that's right. After the writing I want a 16 bit image (tiff or something linke this). I want to load this in another application and 8 bit per channel (red, green, blue and alpha) is too imprecise. So I need a 16 bit image. I didn't get errors but the values are false in the image. It looks wrong. If I set all data values to 1.0f then I get a half transparent bluish image. You see my problem? Or isn't it clear? Thank you Martin Original-Nachricht Datum: Fri, 04 Mar 2011 09:06:13 +1100 Von: Ulrich Hertlein u.hertl...@sandbox.de An: OpenSceneGraph Users osg-users@lists.openscenegraph.org Betreff: Re: [osg-users] 16 Bit Image Hi Martin, On 4/03/11 1:32 , Martin Großer wrote: I would like write a 16 bit image. I tried the follow: // image Data float* data = new float[width * height * depth]; (float != 16-bit, but float seems to be what you're after? 'depth' == 4? For RGBA?) // set data to image img-setImage(width, height, 1, GL_RGBA16F_ARB, GL_RGBA, GL_FLOAT, (unsigned char*) data, Image::USE_NEW_DELETE); osgDB::writeImageFile(*img, test_image.tiff); How can I do this? My divining rod seems to be broken. What is the problem again? Do you get an error? Does it crash? Does it look wrong? Cheers, /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- NEU: FreePhone - kostenlos mobil telefonieren und surfen! Jetzt informieren: http://www.gmx.net/de/go/freephone ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] 16 Bit Image
Hi Martin, The osg::Image::setInternalTextureFormat(..) only affects what the osg::Texture will do with passing the image data to OpenGL. In you case you have an Image that is full 32bit floats, it won't store the image data as 16bit floats, it's only down on the GPU that you'll find the 16bit floats. Given this it's not surprising that the tiff plugin won't write half floats, and it only has full floats to write out. I'd be surprised in tiff even supports 16bit floats. Tiff will support ushort images though, so perhaps this is the route you should go. Robert. 2011/3/4 Martin Großer grosser.mar...@gmx.de: Hello Ulrich, yes, the depth = 4 for RGBA, that's right. After the writing I want a 16 bit image (tiff or something linke this). I want to load this in another application and 8 bit per channel (red, green, blue and alpha) is too imprecise. So I need a 16 bit image. I didn't get errors but the values are false in the image. It looks wrong. If I set all data values to 1.0f then I get a half transparent bluish image. You see my problem? Or isn't it clear? Thank you Martin Original-Nachricht Datum: Fri, 04 Mar 2011 09:06:13 +1100 Von: Ulrich Hertlein u.hertl...@sandbox.de An: OpenSceneGraph Users osg-users@lists.openscenegraph.org Betreff: Re: [osg-users] 16 Bit Image Hi Martin, On 4/03/11 1:32 , Martin Großer wrote: I would like write a 16 bit image. I tried the follow: // image Data float* data = new float[width * height * depth]; (float != 16-bit, but float seems to be what you're after? 'depth' == 4? For RGBA?) // set data to image img-setImage(width, height, 1, GL_RGBA16F_ARB, GL_RGBA, GL_FLOAT, (unsigned char*) data, Image::USE_NEW_DELETE); osgDB::writeImageFile(*img, test_image.tiff); How can I do this? My divining rod seems to be broken. What is the problem again? Do you get an error? Does it crash? Does it look wrong? Cheers, /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- NEU: FreePhone - kostenlos mobil telefonieren und surfen! Jetzt informieren: http://www.gmx.net/de/go/freephone ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] 16 Bit Image
Hello, I would like write a 16 bit image. I tried the follow: // image Data float* data = new float[width * height * depth]; // set image data [...] // create Image ref_ptrImage img = new Image; // image internal format img-setInternalTextureFormat(GL_RGBA16F_ARB); // pixel format img-setPixelFormat(GL_RGB); // set data type img-setDataType(GL_FLOAT); // set origion img-setOrigin(Image::BOTTOM_LEFT); // set data to image img-setImage(width, height, 1, GL_RGBA16F_ARB, GL_RGBA, GL_FLOAT, (unsigned char*) data, Image::USE_NEW_DELETE); osgDB::writeImageFile(*img, test_image.tiff); How can I do this? Cheers Martin -- NEU: FreePhone - kostenlos mobil telefonieren und surfen! Jetzt informieren: http://www.gmx.net/de/go/freephone ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] 16 Bit Image
Hi Martin, On 4/03/11 1:32 , Martin Großer wrote: I would like write a 16 bit image. I tried the follow: // image Data float* data = new float[width * height * depth]; (float != 16-bit, but float seems to be what you're after? 'depth' == 4? For RGBA?) // set data to image img-setImage(width, height, 1, GL_RGBA16F_ARB, GL_RGBA, GL_FLOAT, (unsigned char*) data, Image::USE_NEW_DELETE); osgDB::writeImageFile(*img, test_image.tiff); How can I do this? My divining rod seems to be broken. What is the problem again? Do you get an error? Does it crash? Does it look wrong? Cheers, /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
