Razboiul Sovieto Afgan Essay

1089 words - 4 pages

Sisteme de prelucrare şi analiză a imaginilorCruşân Ruxandra, seria 4, grupa 38RezumatCuvinte CheieIntroducereAnaliza şi prelucrarea imaginilor: reprezintă procesul invers celui de sinteză şi constă în prelucrarea imaginii sau reconstrucţia unui obiect pornind de la imagini ale sale. În acest subdomeniu, s-au dezvoltat 3 direcţii:îmbunătăţirea calităţii imaginii - image enhancement - constă în diminuarea sau eliminarea "zgomotului" din imagini (zgomot - pixeli suplimentari sau absenţi);detectarea şabloanelor standard (pattern detection & recognition) şi determinarea gradului de distorsiune în imagini 2D. (Ex: tehnica OCR - recunoaşterea optică a caracterelor după şablon).analiza de imagini şi computer vision (image analysis and computer vision) constă în determinarea obiectelor 2D/3D pornind de la imagini 2D (Ex: roboţii industriali disting obiectele, poziţia şi proprietăţile lor).Iniţial sinteza era considerată o disciplină diferită de analiză şi prelucrare. În prezent cele două subdomenii constituie grafică pe calculator.În sistemele de analiză şi prelucrare se porneşte de la imaginea reală. Asupra ei se aplică:algoritmi de analiză modelul imaginii;algoritmi de prelucrareo imagine afişată pe ecran.Prelucrarea şi analiza imaginilor reprezintă un ansamblu de metode de transformare şi interpretare a informaţiei vizuale, reprezentate în formă digitală. Analiza şi interpretarea imaginilor se fac de obicei cu ajutorul unui sistem de calcul.În domeniul sistemelor de calcul, prelucrarea şi analiza imaginilor de definesc ca orice formă de prelucrare a unui semnal, în acest caz datele de intrare fiind imagini, iar cele de ieşire pot fi tot imagini sau seturi de caracteristici relative la conţinutul imaginilor de intrare.Prelucrarea imaginilor poate fi de mai multe tipuri:DigitalăAnalogicalOptică, cea mai des întâlnită.Prelucrarea şi analiza imaginilor sunt importante în domenii precum: aplicaţii "de consum", imagistica medicală, imagistica satelitara, supraveghere video, interactive om-maşină etc.În cazul aplicaţiilor de consum, cele mai întâlnite sunt corecţiile: corecţii de iluminare, de contrast, corectarea defectelor care pot ajuta aducerea imaginii la o formă finală ideală. De asemenea, se mai pot aplica: corecţia ochilor roşii datoraţi bliţului declanşat prea repede şi vascularizării coroidei ocular; sau corecţia culorii pielii.În cazul imagisticii medicale, prelucrarea imaginilor se referă mai mult la modul de obţinere al acestora:...

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