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Restoring Contrast to Digital Files

There are a wide variety of post-processing software packages out there for a very wide range of purposes: sharpening, noise reduction, grayscale conversion, airbrushing, etc, just to name a few.

This page is concerned with easy to use tools that make a difference in the perception of image quality or sharpness.

DxO Optics Pro

DXO Optics Pro tests and characterizes camera/lens combinations. The software then corrects the image for that particular camera/lens combination. This can be very effective for mediocre lenses, digital noise reduction, etc.

The main limitation is DXO support for specific lens and camera combinations (consider a Nikon lens on a Leica M digital body; this is not likely to be offered).

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Diglloyd Making Sharp Images articulates years of best practices and how-to, painstakingly learned over a decade of camera and lens evaluation.

Save yourself those years of trial and error by jump-starting your photographic technical execution when making the image. The best lens or camera is handicapped if the photographer fails to master perfect shot discipline. High-resolution digital cameras are unforgiving of errors, at least if one wants the best possible results.

  • Eases into photographic challenges with an introductory section.
  • Covers aspects of digital sensor technology that relate to getting the best image quality.
  • Technique section discusses every aspect of making a sharp image handheld or on a tripod.
  • Depth of field and how to bypass depth of field limitations via focus stacking.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • MTF, field curvature, focus shift: insight into the limitations of lab tests and why imaging performance is far more complex than it appears.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • How to test a lens for a “bad sample”.

Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.

Variants DPP + Auto Levels, DPP + Perceptool available in full article

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