The process of merging multiple images of the same scene, each with a different focal plane, into a single image with an increased depth of field is a powerful technique in various fields. This technique is particularly useful in situations where achieving sufficient sharpness across the entire subject is otherwise impossible due to lens limitations or macro photography constraints. For example, capturing a fully in-focus image of a complex insect requires this approach, as a single shot often results in only parts of the insect being sharp.
Employing this technique offers significant advantages, including enhanced detail, improved clarity, and greater creative control over the final image. It allows photographers and researchers to overcome optical limitations and produce images that were previously unattainable. Historically, achieving these results was a laborious manual process. The evolution of dedicated software has automated and streamlined the process, making it accessible to a wider audience and allowing for more complex and accurate results.
