The world is not always truly reflected in what we see. The brain creates images, fills in gaps and even at times constructs fictions. This book brings together experts from several diverse fields to present state of the art accounts of how the visual world enters two small holes in our heads and is reconstructed to give us the rich impressions of color, movement, and shape.
A human observer is able to recognize the color of objects irrespective of the light used to illuminate them. This is called color constancy. A digital camera uses a sensor to measure the reflected light, meaning that the measured color at each pixel varies according to the color of the illuminant. Therefore, the resulting colors may not be the same as the colors that were perceived by the observer. Obtaining color constant descriptors from image pixels is not only important for digital photography, but also valuable for computer vision, color-based automatic object recognition, and color image processing in general. This book provides a comprehensive introduction to the field of color constancy, describing all the major color constancy algorithms, as well as presenting cutting edge research in the area of color image processing. Beginning with an in-depth look at the human visual system, Ebner goes on to: examine the theory of color image formation, color reproduction and different color spaces; discuss algorithms for color constancy under both uniform and non-uniform illuminants; describe methods for shadow removal and shadow attenuation in digital images; evaluate the various algorithms for object recognition and color constancy and compare this to data obtained from experimental psychology; set out the different algorithms as pseudo code in an appendix at the end of the book. Color Constancy is an ideal reference for practising engineers, computer scientists and researchers working in the area of digital color image processing. It may also be useful for biologists or scientists in general who are interested in computational theories of the visual brain and bio-inspired engineering systems.
Reimagining Constancy in the English Civil Wars exposes writers' reliance on conservative language during one of the most radical periods of English history. In case studies of both familiar genres (country house poem, love lyric, epic) and understudied ones (emblem book, prose romance), it shows how the conservative language of "constancy" was used to justify opposing positions in the period's most pressing controversies, including monarchical rule, ecclesiastical order, Catholicism, and England's relationship to the wider world. At the same time, writers like John Milton, Andrew Marvell, Hester Pulter, Percy Herbert, and others establish the virtue's importance to literary tradition, as they use "constancy" to retain, yet reimagine inherited formal structures and strategies. This book thus uses women's writing and non-canonical texts to highlight cross-factional conservatism and international investment in what scholars often describe as the "English Revolution".
Constancy and the Ethics of Jane Austen's Mansfield Park offers a rigorous philosophical examination of the novel, the first book-length, close reading to do so.
How malleable is human nature? Can an individual really change in meaningful ways? Or, are there immutable limits on the possibilities of human growth set in place by genes and early childhood experiences? These questions touch our deepest political and personal concerns, and have long been a matter of fierce debate in the behavioral sciences.
