In one or more embodiments, an over-sampling method and corresponding over-sampling circuit efficiently generate an over-sampled signal by determining sampling phases in the over-sampled signal that are unused by downstream processing of the over-sampled signal, and skipping the generation of output values for the over-sampled signal that correspond to the unused sampling phases. An average luminance of an image is detected, and then contrast and brightness of image is automatically adjusted according to detected average luminance. The biodegradable andor bioabsorbable matrix can be formed by electrospinning fibers of biodegradable andor bioabsorbable fiberizable material. The one or more images are processed by detecting a rounded object that corresponds to the object of interest.