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LDR / HDR - Workflow case A

From LDR input to LDR output

This is not necessarily the case that would come first to mind, but in fact it turns out that it is a really common case in the image stitching.


How many times have we shot images with very different exposures but without bothering to actually do the bracketing and more, hand-held?

This is exactly the case of Example 1: Hand-held shooting, auto-exposure setting (fully automatic compact camera).


Workflow

The idea to get through such panorama is to use color correction to adjust the exposure between the images and also to benefit of the power of the rendering engine with anti-ghost.

Tips : do not hesitate to play with the histogram range to enhance light and dark tones.


Example 1

Source images

It the most typical case. Large exposure differences between images; all images are taken in automatic mode hand-held.

Autopano250 HDR-casA intro.jpg

Settings

Color correction settings (exposure and gamma)
Render settings

Render

Render


Example 2

Source images

An other case with more important exposure difference. Here it is a bit tricky, even in the stitching because the under-exposed areas are really dark and the over-exposed areas are totally burned.

Autopano250 HDR-casA-2 images.jpg

Settings

Color correction settings (exposure and gamma)
Use of the gamma to recover the dark tones

Render

Render


Example 3

Source images

An other classic case: Sky/Earth. The light sky gives very short exposure times, the ground is therefore less enlightened so gives longer exposure times.

Autopano250 HDR-casA-3 images.jpg


Settings

Here, as the differences are not so large, no color correction was applied. We let the rendering engine match the small exposure differences. It allows to get a panorama that looks like HDR without doing complicate things.

No color correction

Render

Render







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