Eugene A. Sandler

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Error diiusion, ordered dither, and patterning are well-known digital halftoning techniques , each with its advantages and disadvantages. Error diiusion is known for correlated artifacts looking like zebra stripes. Images produced by ordered dither and patterning suuer from artiicial contours in slowly varying regions of pictures. Use of ordered matrices by(More)
Oversampling a delta-sigma-modulated sequence, one can compute unbiased sample estimates of averages of consecutive input elements for a wide variety of inputs. We prove that these estimates are most eecient in their class (that is, variances of sample means are minimum in the class of random binary sequences g n , n = 1; : : : ; N, such that the expected(More)
REASONS FOR PERFORMING STUDY Previous in vitro pilot studies have defined a potentially beneficial effect of insulin-like growth factor-1 (IGF-1) and triamcinolone acetonide (TA) on interleukin-1 (IL-1)-conditioned equine cartilage. Furthermore, an optimal dose for IGF-1 treatment alone has been documented previously using the same test system as in the(More)
OBJECTIVE To determine response of interleukin-1alpha (IL-1alpha)-conditioned equine articular cartilage explants to insulin-like growth factor-1 (IGF-1). Sample Population-Cartilage from the trochlea and condyles of the femur of a clinically normal 4-year-old horse. PROCEDURE Effects of IGF-1 (0 to 500 ng/ml) after addition of IL-1alpha were evaluated by(More)
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