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Art Reproduction: Using Capture One’s Lens Cast Correction tool for creating a uniformly lit scene (flat-field correction)

The Phase One cameras and digital backs are considered to be the leading products when it comes to fine art reproduction and digitisation of drawings, documents, manuscripts and various other flat objects . Over the years, our digital solutions have become very popular in museums, libraries and archives and have become the benchmark for color reproduction and workflow in the reproduction of cultural heritage objects.

For best results in reproduction photography, you need not only the best camera, but you also need optimal lighting conditions. Achieving perfect, uniform lighting in a flat copy setup can sometimes be difficult and time consuming.

Capture One’s Lens Cast Correction (LCC) tool can be used to create a uniformly lit scene, assist in removing any color cast and correct any variations in light intensity across the frame. This is especially important when working within industry guidelines such as Metamorfoze and FADGI.

The image below shows a typical flat copy artwork, lit with two light sources where the LCC image shows some variations in light intensity. We used the highlight warning tool to show the over exposed areas.

Standard image LCC
Before LCC

The corrected LCC image and resulting image of the object show a uniform luminosity across the frame:

Standard LCC
Standard after LCC

The LCC function can be employed when there is a need to enhance certain features or textures in the object, buy using only one, raking light source and then applying LCC to compensate for the variations. The below images show the difference between the two methods at 100% magnification
Top: Raking light, LCC applied
Bottom: standard lighting, LCC applied

You can learn more about LCC here