|
Ground Truth
Ground truth is information that is known to be real or true, provided by direct observation and measurement (i.e. empirical evidence) as opposed to information provided by inference. Etymology The ''Oxford English Dictionary'' (s.v. "ground truth") records the use of the word "Groundtruth" in the sense of a "fundamental truth" from Henry Ellison's poem "The Siberian Exile's Tale", published in 1833. Statistics and machine learning "Ground truth" may be seen as a conceptual term relative to the knowledge of the truth concerning a specific question. It is the ideal expected result. This is used in statistical models to prove or disprove research hypotheses. The term "ground truthing" refers to the process of gathering the proper objective (provable) data for this test. Compare with gold standard. For example, suppose we are testing a stereo vision system to see how well it can estimate 3D positions. The "ground truth" might be the positions given by a laser rangefinder which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Empirical Evidence
Empirical evidence for a proposition is evidence, i.e. what supports or counters this proposition, that is constituted by or accessible to sense experience or experimental procedure. Empirical evidence is of central importance to the sciences and plays a role in various other fields, like epistemology and law. There is no general agreement on how the terms ''evidence'' and ''empirical'' are to be defined. Often different fields work with quite different conceptions. In epistemology, evidence is what justifies beliefs or what determines whether holding a certain belief is rational. This is only possible if the evidence is possessed by the person, which has prompted various epistemologists to conceive evidence as private mental states like experiences or other beliefs. In philosophy of science, on the other hand, evidence is understood as that which '' confirms'' or ''disconfirms'' scientific hypotheses and arbitrates between competing theories. For this role, it is importan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Correction
Atmospheric correction is the process of removing the scattering and absorption effects of the atmosphere on the reflectance values of images taken by satellite or airborne sensors. Atmospheric effects in optical remote sensing are significant and complex, dramatically altering the spectral nature of the radiation reaching the remote sensor. The atmosphere both absorbs and scatters various wavelengths of the visible spectrum which must pass through the atmosphere twice, once from the sun to the object and then again as it travels back up the image sensor. These distortions are corrected using various approaches and techniques, as described below. Examples of Atmospheric Correction Methods See also * Adaptive optics Adaptive optics (AO) is a technology used to improve the performance of optical systems by reducing the effect of incoming wavefront distortions by deforming a mirror in order to compensate for the distortion. It is used in astronomical tele ... References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Applications Of Artificial Intelligence
Artificial intelligence (AI) has been used in applications to alleviate certain problems throughout industry and academia. AI, like electricity or computers, is a general purpose technology that has a multitude of applications. It has been used in fields of language translation, image recognition, credit scoring, e-commerce and other domains. Internet and e-commerce Search engines Recommendation systems A recommendation system predicts the "rating" or "preference" a user would give to an item.Francesco Ricci and Lior Rokach and Bracha ShapiraIntroduction to Recommender Systems Handbook Recommender Systems Handbook, Springer, 2011, pp. 1-35 Recommender systems are used in a variety of areas, such as generating playlists for video and music services, product recommendations for online stores, or content recommendations for social media platforms and open web content recommenders.Pankaj Gupta, Ashish Goel, Jimmy Lin, Aneesh Sharma, Dong Wang, and Reza Bosagh ZadeWTF: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Character Recognition
Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene-photo (for example the text on signs and billboards in a landscape photo) or from subtitle text superimposed on an image (for example: from a television broadcast). Widely used as a form of data entry from printed paper data records – whether passport documents, invoices, bank statements, computerized receipts, business cards, mail, printouts of static-data, or any suitable documentation – it is a common method of digitizing printed texts so that they can be electronically edited, searched, stored more compactly, displayed on-line, and used in machine processes such as cognitive computing, machine translation, (extracted) text-to-speech, key data and text mining. OCR is a field of research in pattern recognition, artificial int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baseline (medicine)
A baseline in science (including medicine) is the initial conditions found by observation and measurement at the beginning of a survey or clinical trial or which is used for comparison with later data collected during or after the survey or trial to identify and measure changes, often with the intention of assessing the effects of a treatment or procedure. In environmental science a baseline study is necessary to be able to accurately determine impact by monitoring the environment and comparing the changing situation with the initial conditions after development has occurred. In some cases, baseline information already be available from previous surveys, but it may be necessary to gather data in the field. Example: If a patient with kidney failure (whose creatinine is usually 3.0 mg/dL) suddenly has a creatinine Creatinine (; ) is a breakdown product of creatine phosphate from muscle and protein metabolism. It is released at a constant rate by the body (depending on muscle ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calibration
In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known accuracy, a device generating the quantity to be measured such as a voltage, a sound tone, or a physical artifact, such as a meter ruler. The outcome of the comparison can result in one of the following: * no significant error being noted on the device under test * a significant error being noted but no adjustment made * an adjustment made to correct the error to an acceptable level Strictly speaking, the term "calibration" means just the act of comparison and does not include any subsequent adjustment. The calibration standard is normally traceable to a national or international standard held by a metrology body. BIPM Definition The formal definition of calibration by the International Bureau of Weights and Measures (BIPM) is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stars And Stripes (newspaper)
''Stars and Stripes'' is a daily American military newspaper reporting on matters concerning the members of the United States Armed Forces and their communities, with an emphasis on those serving outside the United States. It operates from inside the Department of Defense, but is editorially separate from it, and its First Amendment protection is safeguarded by the United States Congress to whom an independent ombudsman, who serves the readers' interests, regularly reports. As well as a website, ''Stars and Stripes'' publishes four daily print editions for U.S. military service members serving overseas; these European, Middle Eastern, Japanese, and South Korean editions are also available as free downloads in electronic format, and there are also seven digital editions. The newspaper has its headquarters in Washington, D.C. History Creation On November 9, 1861, during the Civil War, soldiers of the 11th, 18th, and 29th Illinois Regiments set up camp in the Missouri city of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Ground Truth
''The Ground Truth'' (also known as ''The Ground Truth: After the Killing Ends'') is a 2006 documentary film about veterans of the Iraq War. It was directed and produced by Patricia Foulkrod. Plot The film addresses the issues many soldiers face upon their return from the War in Iraq, including problems with posttraumatic stress disorder and an inability to meld back into "normal" society. The film includes footage of soldiers in Iraq and personal interviews with about two dozen people directly affected by the war (either veterans or family members/friends of veterans). The veterans, both men and women, speak of their experiences before, during, and after the war. The veterans speak about recruitment and training, combat, their returns home, facing their families, and their difficulties in making the necessary changes needed to fit back into society. The Ground Truth was released in theatres on September 15 of 2006 and released on DVD on September 26 of the same year. People can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iraq War
{{Infobox military conflict , conflict = Iraq War {{Nobold, {{lang, ar, حرب العراق (Arabic) {{Nobold, {{lang, ku, شەڕی عێراق (Kurdish languages, Kurdish) , partof = the Iraq conflict (2003–present), Iraq conflict and the War on terror , image = Iraq War montage.png , image_size = 300px , caption = Clockwise from top: US troops at Uday Hussein, Uday and Qusay Hussein's hideout; insurgents in northern Iraq; the Firdos Square statue destruction, toppling of the Saddam Hussein statue in Firdos Square , date = {{ubl, {{Start and end dates, 2003, 3, 20, 2011, 12, 18, df=yes({{Age in years, months and days, 2003, 03, 19, 2011, 12, 18) , place = Iraq , result = * 2003 invasion of Iraq, Invasion and History of Iraq (2003–11), occupation of Iraq * Overthrow of Arab Socialist Ba'ath Party – Iraq Region, Ba'ath Party government * Execution of Saddam Hussein in 2006 * Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Slang
Military slang is an array of colloquial terminology used commonly by military personnel, including slang which is unique to or originates with the armed forces. In English-speaking countries, it often takes the form of abbreviations/acronyms or derivations of the NATO Phonetic Alphabet, or otherwise incorporates aspects of formal military terms and concepts. Military slang is often used to reinforce or reflect (usually friendly and humorous) interservice rivalries. Acronym slang in the U.S. Military A number of military slang terms are acronyms. Rick Atkinson ascribes the origin of SNAFU (Situation Normal, All Fucked Up), FUBAR (Fucked Up Beyond Any Repair or "All Recognition"), and a bevy of other terms to cynical GIs ridiculing the United States Army's penchant for acronyms. Terms then end up being used in other industries as these GIs complete their services. For example, FUBAR evolved into Foobar as GIs coming home from World War II matriculated into Massachusetts Institut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Rushmore
Mount Rushmore National Memorial is a national memorial centered on a colossal sculpture carved into the granite face of Mount Rushmore (Lakota: ''Tȟuŋkášila Šákpe'', or Six Grandfathers) in the Black Hills near Keystone, South Dakota, United States. Sculptor Gutzon Borglum created the sculpture's design and oversaw the project's execution from 1927 to 1941 with the help of his son, Lincoln Borglum. The sculpture features the heads of four United States Presidents recommended by Borglum: George Washington (1732–1799), Thomas Jefferson (1743–1826), Theodore Roosevelt (1858–1919) and Abraham Lincoln (1809–1865). The four presidents were chosen to represent the nation's birth, growth, development and preservation, respectively. The memorial park covers and the mountain itself has an elevation of above sea level. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographic Information System
A geographic information system (GIS) is a type of database containing geographic data (that is, descriptions of phenomena for which location is relevant), combined with software tools for managing, analyzing, and visualizing those data. In a broader sense, one may consider such a system to also include human users and support staff, procedures and workflows, body of knowledge of relevant concepts and methods, and institutional organizations. The uncounted plural, ''geographic information systems'', also abbreviated GIS, is the most common term for the industry and profession concerned with these systems. It is roughly synonymous with geoinformatics and part of the broader geospatial field, which also includes GPS, remote sensing, etc. Geographic information science, the academic discipline that studies these systems and their underlying geographic principles, may also be abbreviated as GIS, but the unambiguous GIScience is more common. GIScience is often considered a sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
