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Interview with an expert 3D-scanner

 

For this article I asked a very talented 3D-specialist to tell me about his work. He combine laser and photogrammetry, which is a popular way of scanning outdoor areas

This is Łukasz Przedpełski:
Hi! I’m Łukasz Przedpełski, I’m 36 years old, and I’ve been working as a 3D laser scanning specialist for 12 years. I specialize in creating precise 3D models using laser scanning and photogrammetry.

Can you tell about the services you provide?

My work involves not only providing clients with high-quality services using innovative measurement solutions and tools but also an exciting journey that combines my interests in photography and exploring forgotten places. Industrial objects such as abandoned houses, factories, warehouses, and halls are particularly fascinating to me. These are places that once teemed with life but are now left in oblivion, exposed to decay. However, in these ruins, you can find unique traces of history and exceptional works of street art. My goal is to capture these places in three-dimensional models that convey their unique character and atmosphere. I do it by using 3D laser scanning and photogrammetry.

What do document in your projects?

During my explorations and scanning sessions, I discover fascinating details that tell the story of these places. Remnants of interiors, cracked walls, rusted structures – all of this not only presents technical challenges but also gives me the opportunity to freeze time and preserve the beauty of these objects. Thanks to 3D laser scanning and photogrammetry, I can accurately reproduce the details and shapes of these objects while preserving their authenticity. I not only document their current state but also create a virtual environment that allows others to take a virtual journey to these places and discover their uniqueness.

How do you share your work?

I share my digital art on platforms like Sketchfab, Artstation, Instagram, and Facebook. I strive to share my passion and knowledge with other enthusiasts, researchers, digital art lovers, and virtual reality enthusiasts. I believe that discovering and documenting abandoned industrial objects is important not only for their historical value but also as a tribute to the memory for future generations.

What made you start using photogrammetry?

I began using photogrammetry due to my constant desire for personal growth and exploration of new fields. One day, while browsing the internet, I came across software RealityCapture, which offered a fascinating opportunity to combine 3D laser scanning with photogrammetry. 

It seemed revolutionary to me, and I decided to take on the challenge. 

I embarked on this journey by purchasing a digital camera, and later, a drone, and from that point onwards, I started experimenting and testing the software.

 

Was the learning process difficult?

Learning photogrammetry wasn’t overly difficult for me because I quickly grasp new skills, especially when they align with my passion and make my work easier. 

Certainly, at the beginning, I had to acquire fundamental knowledge, but I was highly determined and gathered a lot of information from available RealityCapture tutorials and various thematic online forums. 

I’m constantly learning and growing, which only adds to the appeal of this field.

 

What’s your recommendation for people who want to start?

My recommendation for individuals considering diving into the world of photogrammetry is simple: Just start! It’s truly a fascinating endeavor that can bring a lot of satisfaction. 

It’s worth noting that you don’t need to invest large sums of money initially. 

A mobile phone and a free app, of which there are many available on the market, will suffice. 

It’s a great way to test your interest and understand whether it’s something that truly captivates you.

 

What equipment and software do you use?

In the field, I use a Sony a6000 camera and a DJI Mini 3 Pro drone. 

As for software, my primary tool is RealityCapture, which serves as the core of my work. 

For image and photo editing, I use Photoshop and Lightroom. 

My computer is equipped with an Intel Core i7-9700K processor, 64 GB of RAM, and an NVIDIA GeForce RTX 2070 graphics card, enabling me to efficiently handle advanced photogrammetry projects.

 

Number 1: Old, Ruined Baroque

 This is one of my favorite projects because it was the first time I attempted to combine two measurement methods – 3D laser scanning and photogrammetry. 

The entire structure was scanned without the use of an internal camera. 

As part of the tests, I captured a total of 2398 photos using a Sony a6000 camera and a Dji Phantom 2 drone. 

I photographed both the entire exterior and sections of the interior. 

In the later stages of the project, I aimed to achieve the best results by combining these two technologies. 

I revisited this project multiple times, starting from scratch until I obtained a satisfying result. The most significant challenge was data registration. 

If I were to do it today, I would likely capture more photos and place reference markers to facilitate the process.

Number 2 – Large Abandoned Hall with Graffiti and Skatepark 

This project holds a special significance for me because it captured the essence of an abandoned brick factory hall, which I stumbled upon during a walk. 

The place had once attracted youth who created a skatepark there (today, only remnants remain), and graffiti had been painted on the walls. 

I was drawn to the atmosphere of the place and decided to photograph it. In the end, I captured a total of 1828 photos, and this project remains one of my favorites. It has a raw yet colorful character.

Number 3 – Facade of an Abandoned Factory with a Chimney

Facade of an Abandoned Factory with a Chimney – This project is meaningful to me because it marked my first planned outing for a photogrammetry session. 

I found this object online while specifically searching for inactive and abandoned buildings, and it happened to be located not far from my residence. 

I wanted the model to turn out as best as possible, so I waited for the right weather conditions. 

Overcast skies were ideal for avoiding shadows on the 3D model’s texture. I used my DJI Mini 3 Pro drone to capture 1256 photos. 

Unfortunately, I couldn’t entirely avoid sun flares, so I had to pause mid-flight and wait for the sun to hide behind a cloud. 

These were also my early experiences with a drone, so I encountered tree branches a few times. 

Nonetheless, in the end, we managed to achieve a positive outcome, and in my opinion, this project turned out really well.