HDR images (High Dynamic Range) are the result of a technology that imitates the performance of the pupil in the human eye when it becomes adapted to the light. As it dilates and constricts, the pupil integrates the information to be processed by our brain so that we can see dark and light areas more clearly.
In the case of the photographic camera, this function is carried out by the photometer, which measures the light intensity and takes an average of the illuminance in the different areas of the scene.
The coming of digital technology has created the possibility to use HDR techniques, which consist in the correct illumination of all areas even though the amounts of light they contain may differ. Thus, the photographer takes three or more photographs of a scene with different levels of exposure. This is managed by changing the shutter speed.
It is very important that the photographs should be taken from the same location and it is highly advisable to use the help of a tripod.
At the moment of editing, these images are unified and a final product is managed which reproduces both dark and light areas sharply creating a magical and almost three-dimensional effect.
Photos (1): Eduardo Epifanio Photos (2): Jorge González Photos (3): Federico Haag Photos (4): Rocio Vega |