Projection mapping tutorial

How to make 3d video mapping projection? Content which you will project to 3. VJ Software for live operating 4.

Projection mapping tutorial

Applying correction to convert a real fisheye to an idealised fisheye The following documents various transformations from fisheye into other projection types, specifically standard perspective as per a pinhole camera, panorama and spherical projections.

Fisheye images capture a wide field of view, traditionally one thinks of degrees but the mathematical definition extends past that and indeed there are many physical fisheye lenses that extend past degrees.

The two main applications for the following are: The general options for the software include the dimensions of the output image as well as the field of view of the output panoramic or perspective frustum. Some other requirements arise from imperfect fisheye capture such as the fisheye not being centered on the input image, the fisheye not be aligned with the intended axis, and the fisheye being of any angle.

Another characteristic of real fisheye images is their lack of linearity with radius on the image, while this is not addressed here as it requires a lens calibration, it is a straightforward correction to make.

The usual approach for such image transformations is to perform the inverse mapping. That is, one needs to consider each pixel in the output image and map backwards to find the closest pixel in the input image fisheye.

Welcome to my projection mapping blog! This site is intended to provide individuals a place to start when delving into the art of projection mapping. Welcome to my projection mapping blog! This site is intended to provide individuals a place to start when delving into the art of projection mapping. Swarm-based algorithms emerged as a powerful family of optimization techniques, inspired by the collective behavior of social animals. In particle swarm optimization (PSO) the set of candidate solutions to the optimization problem is defined as a swarm of particles which may flow through the parameter space defining trajectories which are driven by their own and neighbors' best performances. A few years ago, video projection mapping (the art of projecting video onto surfaces such as buildings, to create the illusion of 3D art) was a fledgling art form, with a handful of noteworthy, a head-turning projection is par for the course for any music festival set, product launch, or show.

In this way every pixel in the output image is found compared to a forward mappingit also means that the performance is governed by the resolution of the output image and supersampling irrespective of the size of the input image.

A key aspect of these mappings is also to perform some sort of antialiasing, the solutions here use a simple supersampling approach. This is not meant to be a final application but rather something you integrate into your code base.

They all operate on a RGB buffer fisheye image in memory. For each test utility the usage message is provided. The source images for the examples provided are provided along with the command line that generated them.

Fisheye to perspective transformation Software: A fisheye like other projections is one of many ways of mapping a 3D world onto a 2D plane, it is no more or less "distorted" than other projections including a rectangular perspective projection Example source fisheye image.

A critical consideration is antialiasing, required when sampling any discrete signal. The approach here is a simple supersampling antialiasing, that is, each pixel in the output image is subdivided into a 2x2, 3x The final value for the output pixel is the weighted average of the inverse mapped subsamples.

There is a sense in which the image plane is considered to be a continuous function. Since the number of samples that are inverse mapped is the principle determinant of performance, high levels of antialiasing can be very expensive, typically 2x2 or 3x3 are sufficient especially for images captured from video in which neighbouring pixels are not independent in the first place.

For example a 3x3 antialiasing is 9 times slower than no antialiasing. Default perspective view looking forwards, degrees horizontal field of view. Controls are provided for any angle fisheye as well as fisheyes that are not level or tilted, noting that the exact order of the correction rotations may need to be considered for particular cases.

Note that a perspective projection is not defined for greater than degrees, indeed it gets increasingly inefficient past around degrees. The field of view can be adjusted as well as the viewing direction. The following example is a degrees horizontal field of view and looking upwards by 30 degrees.

Projection mapping tutorial

Curvature in what should be straight lines near the rim of the fisheye normally means the fisheye lens has non-linearities near the rim a deviation from the mathematically pure fisheye projection and corrections need to be applied. The following is looking right by 40 degrees and a narrower field of view of 80 degrees.

Where these lines intersect is a close approximation to the center of the fisheye, assuming the camera is mounted vertically.Shadow Mapping. Shadow mapping was introduced by Lance Williams in , in a paper entitled "Casting curved shadows on curved surfaces".

It has been extensively used since, both in offline rendering and real time graphics. Do you love the idea of decorating your home with video for special occasions, but aren’t sure how to get started?We can give you a big short cut with our custom 3D house projections!

Intro. First, let’s discuss what UV mapping actually is and why you need it: UVs are basically just a 2D representation of your 3D model. You need them so that you can texture and use maps such as normal, bump and displacement maps.

This is the updated version of GLSL tutorial. Only the core version is dealt in here. For compatibility features please go to the original GLSL tutorial.. This tutorial does not intend to replace the specs as THE source to fully grasp GLSL and OpenGL, check the documentation at the OpenGL documentation page.

The specs are essential, but can be hard as a learning starting point. UV mapping is the 3D modelling process of projecting a 2D image to a 3D model's surface for texture letters "U" and "V" denote the axes of the 2D texture because "X", "Y" and "Z" are already used to denote the axes of the 3D object in model space.

Omicron is a permanent large scale projection mapping of a beautifully architected 65 meter dome. One Degree of Freedom is my own example of interactive projection mapping using a sensor to track the movement of the mapped object.

Tutorials Projection Mapping - Video Mapping Blog: Projects. Works.