Projector Setup Mapping: How to Set Up Your Projector for Projection
“r” being the throw ratio
“d” stands for throw distance
“B” is the image width
If you’d rather have a more visual explanation, we also made a video on this subject, with a practical case. You’ll definitely know how to set up your projector after watching this, so check it out! The video provides examples of real-world projection mapping shows and demonstrates how to use media such as videos and pictures for your own projects.
R is the throw ratio
The higher the throw ratio, the longer the throw distance. In other words, the bigger R is, the further you can get away from your projection surface or screen to have an optimal image size.
R is related to the type of projector you have, simply type in the model of your projector + throw ratio on Google to find it. (ex: Optoma HZ40 throw ratio)
Ultra short throw : r < 0,3
Short throw : 0,5 < r < 1
Standard throw : r > 1
Introduction to Projection Mapping
Types of projector
Ultra short throw
Ultra short throw projectors generally all look the same, you can often see them in classrooms or meeting rooms. They are put on the ground or on the ceiling or sometimes on the same wall as the projected surface. The precise position of the projector is crucial for optimal projection mapping results, as even small misalignments can affect the accuracy and coverage of the mapped image on the object.
Their throw ratio is low (r < 0,3), they therefore need to be really close to the projected surface. For that reason, they’re not necessarily the first choice in terms of projection mapping. For example, they’re not optimized for three dimensional surfaces because of the very short throw distance, and the technique required for mapping onto complex objects can be challenging with this type of projector. It is recommended to avoid flexible projection surfaces for ultra-short throw projectors to prevent distortion of images, as the position and surface properties of the object can impact how visible and clear the projected image appears.
Short throw
Short throw projectors are perfect if you need to project images but don’t have lots of space around you. These models are often seen in apartments or bedrooms, and generally used for leisure purposes. In these settings, engaging the audience with creative projection mapping can make a big impact.
Their throw ratio is 0,5 < r < 1. This is the typical case when you don’t have much distance from the projected surface and relatively big spaces to cover. Selecting the right screen, considering its material, size, and surface quality, is crucial for achieving optimal image quality in such setups.
There is a maximum throw distance you cannot exceed, otherwise the projected picture and media content won’t be of optimum quality and will get pixelated, affecting the overall viewing experience.
Standard throw
If you want to know more about the perfect projector for your project, regarding luminosity, lifespan, resolution.. We have a full guide for that, be sure to check it out! Choosing the right projection mapping projector depends on the venue’s constraints and budget. When projecting onto large surfaces, you often need to map the area precisely and connect multiple projectors using computers to achieve sufficient brightness and uniformity. Managing these multi-projector setups is crucial for seamless operation, especially for a large-scale projection mapping show.
So there we know all the details of our formula’s components. Therefore, we have all the ingredients to set up our projector perfectly for a mapping! In fact, by just knowing 2 of our components, we can easily find out the third one. Synchronizing music with visuals can further enhance the immersive experience of your projection mapping show.
In fact, if
then we know that,
and
For example
How can I find out at which distance I can put my projector from the projection surface, depending on my video projector and the size of my surface?
Let’s say we have our projector, which is a short throw lens with r = 0,75. We know we want to project on a structure that is 2 meters wide so B = 2. And we want to find out at which distance D we need to put the projector from the projection surface. Well, here’s our formula! This formula helps you calculate the image size for projection mapping by relating the throw ratio, distance, and width of your projection.
If R = D/B, then D = R x B. Let’s replace it with the information we have. D = 0,75 x 2 = 1,50.
So, as D (distance) = 1,50, we know that we will need to be at least 1,50 meters away from our projection surface. You can use this formula as a reference for your setup to ensure the correct image size and optimal projection.
The process of calculating the correct distance involves determining your projector’s throw ratio, measuring your desired image size, and applying the formula step by step. This detailed explanation ensures you understand each stage and can confidently set up your projection mapping system.
Be sure to check out our video dedicated to the subject! It provides additional examples to help you visualize the setup and see practical applications.
All these advice are especially helpful for your prep work, before you get on site, or when you start conceiving the project. Every aspect needs to be finetuned and tweaked when you have all you need at hand. Successful projection mapping requires careful planning of the projection surface and environment lighting. Ambient light affects the visibility and quality of projections, impacting the overall image quality. Scale is crucial in projection mapping; if the projection is too big or too small, the effect is diluted or ineffective. Projectors with a higher brightness output perform better against brighter ambient light.
Do you know what’s even better than knowing how to set up your projector? Trying to do it for real! So get yourself a projector, think of a creative project and try out HeavyM for free to bring your ideas to life! Immersive experiences can be created in settings such as theater, television, or within homes using projection mapping. Projection mapping can bring everyday objects to life, such as shoes and cars. Translucent sheets of plastic can serve as effective canvases for projection mapping due to their ability to glow with light. Projection mapping can also utilize special films to facilitate projection on transparent surfaces like glass.
Understanding Projection Surfaces
In summary, understanding the unique characteristics of different projection surfaces—and how they interact with your projector, mapping software, and environment—is essential for creating immersive and visually stunning projection mapping experiences. By giving more attention to these details, you’ll be well on your way to achieving professional-quality results in any location or installation.
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