image subtraction

См. также в других словарях:

• Image noise — Noise clearly visible in an image from a digital camera Image noise is random (not present in the object imaged) variation of brightness or color information in images, and is usually an aspect of electronic noise. It can be produced by the… …   Wikipedia

• subtraction — A technique used to enhance detectability of opacified anatomic structures on radiographic or scintigraphic images; a negative of an image made before introduction of contrast medium or radionuclide is photographically or electronically removed… …   Medical dictionary

• Digital subtraction angiography — Intervention Example of iodine based contrast in cerebral angiography MeSH …   Wikipedia

• Dark-frame subtraction — In digital photography, dark frame subtraction is a way to minimize image noise for pictures taken with long exposure times. It takes advantage of the fact that a component of image noise, known as fixed pattern noise, is the same from shot to… …   Wikipedia

• Intravenous digital subtraction angiography — (IV DSA) is a form of angiography which was first developed in the late 1970s. IV DSA uses a computer technique which compares an x ray image of a region of the body before and after radiopaque iodine based dye has been injected intravenously… …   Wikipedia

• Dark frame subtraction — In digital photography, dark frame subtraction is a way to minimize image noise for pictures taken with long exposure times. It takes advantage of the fact that a component of image noise is the same from shot to shot: noise from the sensor, dead …   Wikipedia

• digital subtraction — a sophisticated radiological technique in which digitization allows X ray examination, most commonly of blood vessels (see angiography), to be performed using smaller volumes of contrast material. A digitized image is taken before the contrast… …   Medical dictionary

• Raw image format — Infobox file format name = RAW image file extension = .raf (Fuji) .crw .cr2 (Canon) .tif .k25 .kdc .dcs .dcr .drf (Kodak) .mrw (Minolta) .nef .nrw (Nikon) .orf (Olympus) .dng (Adobe) .ptx .pef (Pentax) .arw .srf .sr2 (Sony) .x3f (Sigma) .erf… …   Wikipedia

• Microscope image processing — is a broad term that covers the use of digital image processing techniques to process, analyze and present images obtained from a microscope. Such processing is now commonplace in a number of diverse fields such as medicine, biological research,… …   Wikipedia

• Digital image correlation — and Tracking (DIC/DDIT) is an optical method that employs tracking image registration techniques for accurate 2D and 3D measurements of changes in images. This is often used to measure deformation (engineering), displacement, and strain, but it… …   Wikipedia

• thallium-technetium isotope subtraction imaging — a technique to image the parathyroid glands. Technetium is taken up only by the thyroid gland, but thallium is taken up by both the thyroid and parathyroid glands. digital subtraction of the two isotopes leaves an image of the parathyroid glands… …   Medical dictionary