HDR Soft Pro - 4.2 - Macintosh Manual de usuario descargar pdf (Pagina 4)

Photomatix Pro User Guide 2

1 Taking Photos for HDR

The shooting phase is essential for getting good results

with Photomatix. To photograph a high contrast scene,

you need to take several exposures in order to capture

information in both the highlights and the shadows of

the scene. The exposures taken must properly cover the

dynamic range of the scene, especially the shadows.

The number of photos you need depends on the scene.

It also depends on the Exposure Value (EV) spacing

separating the photos. If you take them in one-EV steps

(e.g., -1, 0, +1 EV), you will need more photos than

if you take them in two-EV steps (e.g., -2, 0, +2 EV).

We recommend shooting in two-EV steps whenever

possible.

High contrast scenes can be grouped into roughly two

types depending on their dynamic range:

• Medium dynamic range scene: Most landscapes

and other types of outdoor scenes fall into this

category. Three exposures taken in two-EV steps (i.e.

–2, 0 +2 EV), or ve exposures taken in one-EV steps,

are usually sucient for this type of scene.

• High dynamic range scene: A typical example is the

interior of a room with a view outside the window on

a sunny day. You need to take at least ve exposures

in two-EV steps (or nine exposures in one-EV steps) to

capture this type of scene, but you may need more.

Taking the exposures manually is recommended in

these cases.

Three exposures of a medium dynamic

range scene, taken in two-EV steps

The source photographs for HDR processing can be taken with digital or lm-based cameras. The only

requirement is that the exposure can be adjusted when taking pictures. If you use a lm-based camera, you

will need to scan the photographs into your computer before processing them (refer to Section 1.3).

1 2 3 4 5 6 7 8 9 ... 31 32

Sin comentarios

HDR Soft Pro - 4.2 - Macintosh Manual de usuario Pagina 4