{"id":5,"date":"2024-04-03T23:31:26","date_gmt":"2024-04-03T20:31:26","guid":{"rendered":"https:\/\/sisu.ut.ee\/imageprocessing\/1-2\/"},"modified":"2024-04-03T23:31:31","modified_gmt":"2024-04-03T20:31:31","slug":"1-2","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/imageprocessing\/1-2\/","title":{"rendered":"1. Introduction to image processing"},"content":{"rendered":"<p><\/p><p><span style=\"color: #000000\">Image processing\u00a0is a method to perform some operations on an image, in order to get an enhanced image or to extract some useful information from it. It is a type of signal processing in which input is an image and output may be image or characteristics\/features associated with that image. Nowadays, image processing is among rapidly growing technologies. It forms core research area within engineering and computer science disciplines too.<\/span><\/p><p><\/p><p><span style=\"font-size: 14px;color: #000000\">Image processing basically includes the following three steps:<\/span><\/p><p><\/p><ul><li><span style=\"font-size: 14px;color: #000000\">Importing the image via image acquisition tools;<\/span><\/li><li><span style=\"font-size: 14px;color: #000000\">Analysing and manipulating the image;<\/span><\/li><li><span style=\"font-size: 14px;color: #000000\">Output in which result can be altered image or report that is based on image analysis.<\/span><\/li><\/ul><p><\/p><p><\/p><p><\/p><p><span style=\"font-size: 14px;color: #000000\">There are two types of\u00a0methods used for image processing\u00a0namely,\u00a0analogue and digital\u00a0image processing. Analogue image processing can be used for the hard copies like printouts and photographs. Image analysts use various fundamentals of interpretation while using these visual techniques. Digital image processing techniques help in manipulation of the digital images by using computers. The three general phases that all types of data have to undergo while using digital technique are pre-processing, enhancement, and display, information extraction.<\/span><\/p><p><\/p><p><span style=\"color: #000000\">In this lecture we will talk about a few fundamental definitions such as image, digital image, and digital image processing. Different sources of digital images will be discussed and examples for each source will be provided. The continuum from image processing to computer vision will be covered in this lecture. Finally we will talk about image acquisition and different types of image sensors.<\/span><\/p><p style=\"text-align: center\"><span style=\"color: #000000\"><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>To view third-party content, please accept cookies.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Change consent<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div><\/span><\/p><p style=\"text-align: center\"><a href=\"http:\/\/www.uttv.ee\/naita?id=20081\" target=\"_blank\" rel=\"noopener\">http:\/\/www.uttv.ee\/naita?id=20081<\/a>\u00a0<\/p><p style=\"text-align: center\"><a href=\"http:\/\/youtu.be\/FPNGPHkXybo?list=UU-ETlxdihAaw8Pn6_Zz10lg\" target=\"_blank\" rel=\"noopener\">http:\/\/youtu.be\/FPNGPHkXybo?list=UU-ETlxdihAaw8Pn6_Zz10lg<\/a><\/p><p style=\"text-align: left\"><span style=\"color: #000000\">Further details on why we need digital image processing have been discussed in another presentation which was hold in January 2014. In order to access the video of that presentation please <a href=\"http:\/\/www.uttv.ee\/naita?id=18656\" target=\"_blank\" title=\"Why do we need digital image processing?\" rel=\"noopener\">click here<\/a>.<\/span><\/p><br><div class=\"wp-block-group attached-files-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-file\"><a href=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/105\/vid_lecture01fin.ppt\" target=\"_blank\" rel=\"noreferrer noopener\">Lecture_01.ppt<\/a><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Image processing\u00a0is a method to perform some operations on an image, in order to get an enhanced image or to extract some useful information from it. It is a type of signal processing in which input is an image and &#8230;<\/p>\n","protected":false},"author":40,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-5","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/pages\/5","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/users\/40"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/comments?post=5"}],"version-history":[{"count":2,"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/pages\/5\/revisions"}],"predecessor-version":[{"id":76,"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/pages\/5\/revisions\/76"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/imageprocessing\/wp-json\/wp\/v2\/media?parent=5"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}