Focus Stories

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in GIM International magazine. By including a mix of older and more recent articles, we will present a complete recap of the subject. Furthermore, we will be bringing you a bi-weekly round-up of ‘Focus Stories’ related to the theme through our newsletter (sign up here). The theme for January 2016 is:

Photogrammetry and Point Clouds

What is a Point Cloud?

A point cloud is basically a large collection of points that are placed on a three-dimensional coordinate system.  Point cloud files greatly speed the design process by providing real-world context where you can re-create the referenced objects or insert additional models.  Point clouds are derived from raw data gathered by using a 3D scanner to obtain points from such things as buildings, topographies, or manufactured items. 

Point Clouds of a building

News: Photogrammetry
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Programme of the 57th Photogrammetric Week in Stuttgart Announced

The biennial event Photogrammetric Week (PhoWo) will this year be held from 9-13 September in Stuttgart, Germany. PhoWo was initiated by Carl Pulfrich as a “vacation course in photogrammetry&rdq... (read more)
Articles: Photogrammetry
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Recent Developments in Close-range Photogrammetry

Dramatic advances in automatic digital image analysis have opened up new applications and made photogrammetry applicable for a broader field of users that lack specific knowledge of photogrammetry. Megatrends such as Industry... (read more)

Aerial photo

What is Photogrammetry?

Photogrammetry is the science of making measurements from photographs.The output of photogrammetry is typically a map, drawing, measurement, or a 3D model of some real-world object or scene.
Many of the maps we use today are created with photogrammetry and photographs taken from aircraft.

Photogrammetry and Point Clouds

Benefits of Sweeping Airborne Cameras

The A3 Edge digital mapping system is a sweeping camera system able to produce high-resolution and accurate imagery from high flight altitudes and hence to conduct surveys quickly and efficiently. The... (read more)

Bringing Colour to Point Clouds

Until now, most commercially available airborne Lidar systems have operated on one single wavelength, reflecting energy from a pulse which is then used for classification or visualisation. New develop... (read more)

Dense Image Matching

3D reconstruction using dense image matching is a hot topic as it enables the automatic extraction of 3D urban models, notably from airborne oblique imagery. However, applying DIM algorithms to obliqu... (read more)
Photogrammetry and Point Clouds

3D Modelling of Fez

The ancient imperial city of Fez, Morocco, is an important tourist attraction and has been listed as a UNESCO World Heritage Site since 1981. The layout of the city is complex, which presents challeng... (read more)

Poles from Point Clouds

Currently, the extraction of objects from point clouds of urban sites is commonly done manually as automation is impeded by noise, clutter, occlusions and varying point density. The authors have devel... (read more)

Towards Optimal 3D Point Clouds

Motivated by the increasing need of rapid characterisation of environments in 3D, the authors have designed a robot system that automates the work of an operator of terrestrial laser scanners. The bui... (read more)
 
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