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مهندس معدن - decorrelation stretch
 
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من فروتن ، مهندس اکتشاف معدن و دانشجوی سال آخر کارشناسی ارشد اکتشاف هستم و هدف از این وبلاگ قرار دادن تجربیات شخصی و مطالب مرتبط با رشته و پاسخگویی به سوالات شما در زمینه اکتشاف و فرآوری و مسائل حقوقی معدن می باشد.
لذا سوالات و درخواست های خود را در قسمت "تماس با ما" بیان فرمایید
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جمعه 7 تیر 1392 :: نویسنده : مهندس معدن

در سایت  davinci چنین تعریف شده است

A decorrelation stretch (dcs) is a method to maximize the difference between different bands of data. By using eigen vectors and a covariance matrix, the data is "rotated" in to a new space where the values are then maximized and returned to the original space. A useful property of the dcs stretch is that it maximizes differences between bands. This is especially useful for THEMIS IR data where compositional information shows up as slight variations in emssivity or radiance between bands. Thus compositional variaion gets maximized and it will show up as a different color in the dcs stretch.

In the dcs image below, the pink material in the bottom of the crater is a different composition (high quartz bearing mineral, resembling granite) than the surroundings and appears vastly different than the rest of the image.


در ویکی پدیا

In image processing decorrelation techniques can be used to enhance or stretchcolour differences found in each pixel of an image. This is generally termed as 'decorrelation stretching'.





نوع مطلب : سنجش از دور، نرم افزار، اکتشاف، تحلیلی، 
برچسب ها : decorrelation stretch،
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