The Value of Quality

Quality In During a brief visit to London’s Victoria and Albert Museum one of the subjects was shot with the best camera to hand – an iPhone. The museum contains a wealth of art – the very finest expressions of what it means to be a creator. There were many worthy subjects but most were Read more about The Value of Quality[…]

More Than One Orthophoto

Pre-Restoration Scan Recently we acquired a very rare WW2 vintage torpedo motor from Deeper Dorset‘s very own Grahame Knott. The motor is unusual; instead of the typical 4-cylinder radial configuration this example is an experimental 2-stroke 8-cylinder radial engine. As far as we know the engine was never put into production, but there are a Read more about More Than One Orthophoto[…]

DEMS – Another View

Slope Analysis As we have discussed before Digital Elevation Models help us understand subtle changes in depth (or height) of the subject. We also think they are art in their own right. Tucked away in the 1.4 release of Agisoft Photoscan Pro is a preference that adds slope analysis. The colours applied to the model Read more about DEMS – Another View[…]

Rolling Shutters and Boring Models

The Most Boring Model on the Internet Its never a good idea to test software capabilities when the pressure is on to deliver a job. The manual may well claim everything works out of the box but its a high risk strategy. Which is how we came to find ourselves standing in a field flying Read more about Rolling Shutters and Boring Models[…]

Let There Be Light

In the Beginning… In our temperate northern waters there is a lack of light. The very thing that underwater photogrammetry needs is often in short supply and light is like a drug. You always want more. Underwater photographers get around the limits of natural light with flash guns or video lights and these generally work Read more about Let There Be Light[…]

Underwater GPS and Photogrammetry

Where am I? Trying to scan underwater sites such as submerged landscapes or very broken wrecks often results in becoming hopelessly lost. Add into the mix the vision limiting experience of low visibility and a difficult job gets a lot harder. When on a sightseeing dive disorientation can be frustrating as you fin around missing Read more about Underwater GPS and Photogrammetry[…]

The Art of DEM

The Art of DEM For some reason, I am drawn to Digital Elevation Models (DEM). They express so much information in such an elegant way. Their creation does require embedding GPS data, but thats almost a given these days as its a straightforward exercise pulling points out of sonar. In simple terms, a DEM is Read more about The Art of DEM[…]

NDAC Orthophoto

Over the last week the NDAC model grew a little bit, with the BaE 146 aircraft joining the overall site (Thanks Marcus!). An updated model will be published soon. GPS Data Other progress included adding GPS data, using Google Earth to glean the latitude and longitude of the various buoys that mark the attractions. Depth was taken Read more about NDAC Orthophoto[…]

The NDAC Diver Attractions Model

Regular visitors to the News section may remember that Simon Brown (Deep3D) and Marcus Blatchford had a very informal project running to map as much of the National Diving & Activity Centre as they could. If you want to read more about how the model was created, do please read on. But if the model is all you Read more about The NDAC Diver Attractions Model[…]