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I’m trying to create a 3D texture with depth using KTX2 files for volume rendering in Three.js. I have a KTX2 file that, when extracted using,produces 64 slices named output_depth*.png, each of size ...
Abdullah Developer's user avatar
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1 answer
145 views

I am working on a 3D visualization, in which I would like to mark part of the space, thus drawing something like a semi-transparent cloud in a given color. I was googling for recipes and here is what ...
Maciek's user avatar
  • 802
1 vote
0 answers
168 views

How can I localize 2D projections in (dense, transparent) 3D volumes? I seem to only find algorithms that work on datasets with non-transparent surfaces. Those algorithms rely on geometric assumptions ...
lematthias's user avatar
  • 291
0 votes
1 answer
182 views

I have konw: Volume Rendering: We know the focal point of the camera, and the connection between the focal point and the pixel can create a ray. We can sum the colors of all points on this ray to ...
Timi's user avatar
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1 answer
431 views

I'm trying to create 3D model of the skull using VTK [example]:(https://kitware.github.io/vtk-examples/site/Python/VisualizationAlgorithms/HeadBone/) #!/usr/bin/env python # noinspection ...
Powiee's user avatar
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1 vote
0 answers
101 views

I am creating a direct volume rendering application with the goal of writing at least 2 2d transfer functions and a 3d transfer function for determining colour and opacity values for voxels. I have a ...
codeine_cola's user avatar
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1 vote
0 answers
86 views

I'm following this tutorial by nVidia for implementing a fluid simulation, however i'm confused about this part in the the ray marching algorithm section. The ray direction is given by the vector ...
Gianluca Iacchini's user avatar
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1 vote
0 answers
311 views

I have got a scene with an object and a cubemap in OpenGL. My atmosphere shader(rayleigh scattering) renders to a quad which is right infront of the camera. This of course obstructs vision on my ...
kurito's user avatar
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0 votes
1 answer
138 views

I have a 3d array representing a volume. Every voxel keeps a vector (k1, k2) as its local principle curvature. Now, I need to visualize this volume by color (just like the picture below). So I need to ...
Raykie's user avatar
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1 answer
2k views

I have a GLSL fragment shader as part of a pipeline that renders slices of two 3D volumes blended together. For one of the volumes, I would like to use nearest neighbor interpolation since it is a &...
iv1's user avatar
  • 45
1 vote
1 answer
468 views

I have a 3D array dataset of scientific data that is to be rendered using WebGL. This is the code that I have wrote and this is the result that I have achieved so far. I am clueless for two things ...
Pravin Poudel's user avatar
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2 votes
1 answer
567 views

I am trying to create a 3D array to then perform volume rendering on (in other software or volume rendering packages) of strange attractor like Lorenz Attractor. It is easy enough to plot the ...
Robin White's user avatar
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1 answer
427 views

I'm currently working on a volume rendering project in python where I use a compositing ray casting function to produce an image, given a 3D volume consisting of voxels. The function (which I show ...
Peter's user avatar
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1 answer
163 views

I've implemented XTK lesson 13 from the AMI examples (this - https://fnndsc.github.io/ami/#xtk_lesson13) by passing a set of DICOM images. In the slices obtained, there are these colored dotted lines ...
Zephyr's user avatar
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7 votes
1 answer
1k views

I have a task to visualize 3D field of scalars using Helix Toolkit. The input array contains double values without limitations, but usually somewhere between [-50000, +50000]. The scalar value affect ...
Aleksei Petrov's user avatar
  • 1,099
2 votes
1 answer
2k views

i' am implementing an algorithm of volume rendering "GPU ray casting single pass". For this, i used a float array of intensity values as 3d textures ( this 3d textures describes a regular 3d grid in ...
sebastian pinto's user avatar
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227 views

My project aims to render to texture based on OpenTK (Version 3.0.1.0, C#). Most codes were translated from this tutorial which using C++. I just want to use an texture(int backfaceTex) in the ...
J. Sue's user avatar
  • 64
2 votes
1 answer
1k views

I am a graphics programming beginner working on my own engine and tried to implement frustum-aligned volume rendering. The idea was to render multiple planes as vertical slices across the view ...
Blendurian's user avatar
  • 65
0 votes
1 answer
393 views

I had tried the following demo code in Matlab. I'm using Matlab 2018b load('spiralVol.mat'); h = volshow(spiralVol); But I'm getting a black screen.imshow() is working properly. Is it related to ...
stu dent's user avatar
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0 answers
500 views

I have a volume dataset, that I can render(this was part of a homework) I have already implemented ray casting using front-to-back composition and I want to integrate phong-shading. For computing the ...
greedsin's user avatar
  • 1,272
2 votes
0 answers
180 views

For 2D images- Gx and Gy gives the information on vertical and horizontal edge infromation respectively. Angle of the gradient direction vector can be calculated from inverse of tan(Gy/Gx) and edge ...
Maharshi's user avatar
  • 61
1 vote
1 answer
408 views

I am trying to do volume rendering using one of the open source project. I want to create a surface file from my DICOM images. I know this is possible by using mango viewer exe; but I want to do it ...
Nikhil Ghuse's user avatar
  • 1,286
1 vote
0 answers
446 views

I would like to do volume rendering in vtk(python) using low data of grid and scalar values. The Data which I have is like below #{ # "Field Quantity": "p(x,y,z,f)" # "Field Quantity Units": "...
박태영's user avatar
  • 75
1 vote
0 answers
133 views

I am referring to the code by Lebarba for Volume Rendering. What I am trying to do is the X-Ray Rendering rather than Ray casting. Here is the result for the Ray casting with the code RayCasting ...
newcomer's user avatar
  • 422
1 vote
1 answer
1k views

I want to render a 3D volume with vtk.js. My issue is that all the tutorials/examples in the vtk.js documentation load and render vti files. In my case, my data is just a Float32Array which contains ...
AstrOne's user avatar
  • 3,809
1 vote
1 answer
580 views

I want to visualise 3D volumes of data that span between a few gigabytes to a few terabytes. One solution would be to roll my own but this may take some time. To avoid this I am currently exploring ...
AstrOne's user avatar
  • 3,809
2 votes
1 answer
3k views

I am attempting to create an empty 3D texture, the dimensions and format of which are loaded in at runtime. I then want to modify the values of this texture, which I am then volume rendering with a ...
Strawhare's user avatar
  • 466
0 votes
1 answer
2k views

Why we have to align the textures in different directions depending on the perspective of the camera? Shouldn't it be the same?(If I enabled depth test) Edit 1: I used my own program to test it. ...
FunnyFunkyBuggy's user avatar
  • 613
0 votes
1 answer
9k views

I am currently trying to learn ray casting on a 3D texture using something like glTexImage3D. I was following this tutorial from the start. My ultimate goal is to produce a program which can work like ...
FunnyFunkyBuggy's user avatar
  • 613
3 votes
0 answers
1k views

I'm discovering VTK and want to use it to plot a 3D numpy array. So far, I've managed to convert a numpy array to a vtk.Volume and displaying it but from there I am having a hard time getting ...
Soltius's user avatar
  • 2,283
0 votes
1 answer
2k views

I am making a volume renderer. I have successfully read the volume and have few classes ready from my ray tracer. Now problem is how to do Ray and Volume (It's size is 256 * 256 * 256) intersection so ...
user3870357's user avatar
  • 31
8 votes
2 answers
708 views

If anyone cares, I'm using WPF.... Beginning of story: I got a series of gray-scale images(slices of a model). The user inputs a "range" of gray-scale values to build a 3D model upon. Thus I created ...
None's user avatar
  • 617
0 votes
1 answer
3k views

Through VTK Python API, we can import/make 3d image data and Volume Rendering as follow: And the Python code is: # coding=utf-8 import vtk from numpy import * import random num = 74 # We begin by ...
Honghe.Wu's user avatar
  • 7,009
1 vote
1 answer
578 views

yt-project is a nice toolkit for volumetric data. But the dataset it used is a bit of complex, such as Enzo data. So if I only want to volume render a simple 3d data via yt-project, how to load data? ...
Honghe.Wu's user avatar
  • 7,009
1 vote
1 answer
963 views

This introduces the method of Volume Rendering using obsolete API of OpenGL. But now, I want to complete the Volume Rendering using GLSL and I have finished some parts of it. My question is how to do ...
Hurricane's user avatar
  • 31
0 votes
1 answer
1k views

A question sort of addressing the problem and another question asking a related question. I have a 2D texture that has 12x12 slices of a volume layered in a grid like this: What I am doing now is ...
Noobs DeSroobs's user avatar
  • 283
1 vote
1 answer
896 views

I have a problem in Volume Rendering using GLSL. The source code can be found in the following link https://github.com/toolchainX/Volume_Rendering_Using_GLSL. In the fragment shader named raycasting....
Hurricane's user avatar
  • 31
-1 votes
2 answers
945 views

I'm getting this error at runtime when launching my C# volume rendering program. I saw that I'm not the only one, but still did not find any solution. I read that it could be a NVidia related error. ...
Charrette's user avatar
  • 720
0 votes
0 answers
402 views

So I have been looking into volumetric rendering using raycasting and i found an tutorial blog here http://graphicsrunner.blogspot.co.uk/2009/01/volume-rendering-101.html Now I managed to get this ...
user3546481's user avatar
  • 117
0 votes
2 answers
2k views

I'm working on my volume rendering application (C# + OpenTK). The volume is being rendered using raycasting, i found a lot of inspiration on this site: http://graphicsrunner.blogspot.sk/2009/01/...
imo's user avatar
  • 11
2 votes
1 answer
3k views

I'm having an issue creating a 3D texture and filling it with images. What I want to do is creating a Volumetric/3D texture with the RGBA values of my images, and put it in order in the texture. In ...
Bitelchús's user avatar
  • 65
0 votes
0 answers
114 views

I have a 3D matrix in Matlab that was created using a volume MRI scan. I then use matlab toolbox iso2mesh (vol2surf) to convert this volume to a surface mesh and then extract the nodes/vertex ...
Maheen Siddiqui's user avatar
  • 549
1 vote
2 answers
2k views

I am trying to render an indoor scene with floor and walls and box like furniture in it using vtk in python. I figured how to draw a single plane in vtk (see code below). But I cannot figure out how ...
Isabela's user avatar
  • 156
2 votes
1 answer
2k views

I'm developing a C++ application that uses VTK for some visualization. I need to read a .vtr file (RectilinearGrid) and render it using VTK volume rendering features.I tried to do that with Paraview ...
Oneiros's user avatar
  • 4,388
0 votes
0 answers
637 views

I started with the vol3d function from MATLAB file exchange for the 3D display part but its slowing down the entire application. I am working on a MATLAB based GUI. Need to display a volume of size ...
Rumman Khan's user avatar
  • 46
0 votes
0 answers
192 views

In my application a user interacts with a 3D volumetric rendering. The data is quite noisy, but there are objects of interest buried in the noise. My users are able to get a good geometric sense of ...
user3391229's user avatar
  • 818
0 votes
1 answer
401 views

I am trying to implement a simple raycasting volume rendering in WebGL. It is kind of working, but there are some artifacts when you rotate the volume around (i.e. the head appears deformed). Live ...
Nicolas's user avatar
  • 2,281
0 votes
1 answer
371 views

I think I have come across a genuine bug. It seems that something very strange and certainly unintuitive is happening with the colortransferfunction(CTF) interface. I'll describe here what I've shown ...
user3391229's user avatar
  • 818
0 votes
1 answer
238 views

I am wondering how the hounsfield values are handled when visualizing CT datasets. Since the range of the HU unit contains negative values which might be problematic to handle (for example when ...
Marius Herzog's user avatar
  • 597
2 votes
1 answer
1k views

We've been doing lots of work trying to volume render 3D cloud fields in WebGL. The approach we've taken so far is outlined here - the start position of each ray is the current position in the front ...
nrob's user avatar
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