{"id":82,"date":"2024-04-17T13:06:29","date_gmt":"2024-04-17T10:06:29","guid":{"rendered":"https:\/\/sisu.ut.ee\/imageprocessing\/contrast-enhancement-test\/"},"modified":"2024-04-17T13:06:29","modified_gmt":"2024-04-17T10:06:29","slug":"contrast-enhancement-test","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/imageprocessing\/contrast-enhancement-test\/","title":{"rendered":"Contrast Enhancement Test"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam4\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-4\"><p>In this quiz we will ask about contrast enhancement<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-4\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"  watupro-required-16 watupro-question-id-16\">\n\t\t\t<div class=\"question-content\"><div><p>High contrast image has wider range of pixel intensity value than low contrast image,<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"16\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType16\" class=\"answerTypeCnt1\" value=\"radio\"><input type=\"hidden\" id=\"watupro-required-question-16\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices16\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-16[]\" id=\"answer-id-32\" class=\"answer   answerof-16 \" value=\"32\"><label for=\"answer-id-32\" id=\"answer-label-32\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-16[]\" id=\"answer-id-33\" class=\"answer   answerof-16 \" value=\"33\"><label for=\"answer-id-33\" id=\"answer-label-33\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"  watupro-required-17 watupro-question-id-17\">\n\t\t\t<div class=\"question-content\"><div>Which statistical parameter indicate the brightness of an image?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"17\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType17\" class=\"answerTypeCnt2\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-17\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices17\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-17[]\" id=\"answer-id-34\" class=\"answer   answerof-17 \" value=\"34\"><label for=\"answer-id-34\" id=\"answer-label-34\" class=\" answer\"><span><p>Standard Deviation<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-17[]\" id=\"answer-id-35\" class=\"answer   answerof-17 \" value=\"35\"><label for=\"answer-id-35\" id=\"answer-label-35\" class=\" answer\"><span><p>Mean<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-17[]\" id=\"answer-id-36\" class=\"answer   answerof-17 \" value=\"36\"><label for=\"answer-id-36\" id=\"answer-label-36\" class=\" answer\"><span><p>Median<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-3\" style=\";\"><div id=\"questionWrap-3\" class=\"  watupro-required-18 watupro-question-id-18\">\n\t\t\t<div class=\"question-content\"><div><p>Logarithmic function will make a dark image darker.<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_3\" value=\"18\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType18\" class=\"answerTypeCnt3\" value=\"radio\"><input type=\"hidden\" id=\"watupro-required-question-18\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices18\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-18[]\" id=\"answer-id-37\" class=\"answer   answerof-18 \" value=\"37\"><label for=\"answer-id-37\" id=\"answer-label-37\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-18[]\" id=\"answer-id-38\" class=\"answer   answerof-18 \" value=\"38\"><label for=\"answer-id-38\" id=\"answer-label-38\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-4\" style=\";\"><div id=\"questionWrap-4\" class=\"  watupro-required-19 watupro-question-id-19\">\n\t\t\t<div class=\"question-content\"><div><p>Out of histogram equalization is used an the new input into the histogram equalization again. Which image will have brighter view?<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_4\" value=\"19\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType19\" class=\"answerTypeCnt4\" value=\"textarea\"><input type=\"hidden\" id=\"watupro-required-question-19\"><!-- end question-content--><\/div><div class=\"question-choices \" id=\"questionChoices19\"><p><textarea name=\"answer-19[]\" id=\"textarea_q_19\" class=\"watupro-textarea-medium\" rows=\"5\" cols=\"80\"><\/textarea>\n<\/p><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-5\" style=\";\"><div id=\"questionWrap-5\" class=\"  watupro-required-20 watupro-question-id-20\">\n\t\t\t<div class=\"question-content\"><div><p>Histogram equalization uses identity transform for illumination enhancement.<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_5\" value=\"20\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType20\" class=\"answerTypeCnt5\" value=\"radio\"><input type=\"hidden\" id=\"watupro-required-question-20\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices20\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-20[]\" id=\"answer-id-40\" class=\"answer   answerof-20 \" value=\"40\"><label for=\"answer-id-40\" id=\"answer-label-40\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-20[]\" id=\"answer-id-41\" class=\"answer   answerof-20 \" value=\"41\"><label for=\"answer-id-41\" id=\"answer-label-41\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-6\" style=\";\"><div id=\"questionWrap-6\" class=\"  watupro-required-21 watupro-question-id-21\">\n\t\t\t<div class=\"question-content\"><div><p>Negative transform is a linear transform.<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_6\" value=\"21\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType21\" class=\"answerTypeCnt6\" value=\"radio\"><input type=\"hidden\" id=\"watupro-required-question-21\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices21\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-21[]\" id=\"answer-id-42\" class=\"answer   answerof-21 \" value=\"42\"><label for=\"answer-id-42\" id=\"answer-label-42\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-21[]\" id=\"answer-id-43\" class=\"answer   answerof-21 \" value=\"43\"><label for=\"answer-id-43\" id=\"answer-label-43\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-7\" style=\";\"><div id=\"questionWrap-7\" class=\"  watupro-required-22 watupro-question-id-22\">\n\t\t\t<div class=\"question-content\"><div>Which transformation will make a bright image darker?<\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_7\" value=\"22\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType22\" class=\"answerTypeCnt7\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-22\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices22\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-22[]\" id=\"answer-id-44\" class=\"answer   answerof-22 \" value=\"44\"><label for=\"answer-id-44\" id=\"answer-label-44\" class=\" answer\"><span><p>n-root<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-22[]\" id=\"answer-id-45\" class=\"answer   answerof-22 \" value=\"45\"><label for=\"answer-id-45\" id=\"answer-label-45\" class=\" answer\"><span><p>logarithmic<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-22[]\" id=\"answer-id-46\" class=\"answer   answerof-22 \" value=\"46\"><label for=\"answer-id-46\" id=\"answer-label-46\" class=\" answer\"><span><p>n-power<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-8\" style=\";\"><div id=\"questionWrap-8\" class=\"  watupro-required-23 watupro-question-id-23\">\n\t\t\t<div class=\"question-content\"><div><p>Normalized histogram og an image is probability distribution function of that image.<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_8\" value=\"23\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType23\" class=\"answerTypeCnt8\" value=\"radio\"><input type=\"hidden\" id=\"watupro-required-question-23\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices23\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-23[]\" id=\"answer-id-47\" class=\"answer   answerof-23 \" value=\"47\"><label for=\"answer-id-47\" id=\"answer-label-47\" class=\" answer\"><span>True<\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-23[]\" id=\"answer-id-48\" class=\"answer   answerof-23 \" value=\"48\"><label for=\"answer-id-48\" id=\"answer-label-48\" class=\" answer\"><span>False<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div style=\"display:none\" id=\"question-9\">\n\t<div class=\"question-content\">\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t<\/div>\n<\/div>\n\n<br>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons4\">\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; Previous\" onclick=\"WatuPRO.nextQuestion(event, 'previous');\"><\/div>\t\t  \t\t  \t\t   \n\t\t   \t  \t\t<div><input type=\"button\" name=\"action\" class=\"watupro-submit-button\" onclick=\"WatuPRO.submitResult(event)\" id=\"action-button\" value=\"View Results\">\n\t\t<\/div>\n\t\t<\/div>\n\t\t\n\t<input type=\"hidden\" name=\"quiz_id\" value=\"4\" id=\"watuPROExamID\">\n\t<input type=\"hidden\" name=\"start_time\" id=\"startTime\" value=\"2026-04-22 19:49:52\">\n\t<input type=\"hidden\" name=\"start_timestamp\" id=\"startTimeStamp\" value=\"1776887392\">\n\t<input type=\"hidden\" name=\"question_ids\" value=\"\">\n\t<input type=\"hidden\" name=\"watupro_questions\" value=\"16:32,33 | 17:34,35,36 | 18:37,38 | 19:39 | 20:40,41 | 21:42,43 | 22:44,45,46 | 23:47,48\">\n\t<input type=\"hidden\" name=\"no_ajax\" value=\"0\">\t\t\t<\/form>\n\t<p>\u00a0<\/p>\n<\/div>\n\n<script type=\"text\/javascript\">\n\/\/jQuery(document).ready(function(){\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \t\nvar question_ids = \"16,17,18,19,20,21,22,23\";\nWatuPROSettings[4] = {};\nWatuPRO.qArr = question_ids.split(',');\nWatuPRO.exam_id = 4;\t    \nWatuPRO.post_id = 82;\nWatuPRO.store_progress = 0;\nWatuPRO.curCatPage = 1;\nWatuPRO.requiredIDs=\"0,16,17,18,19,20,21,22,23\".split(\",\");\nWatuPRO.hAppID = \"0.91451900 1776876592\";\nvar url = \"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/show_exam.php\";\nWatuPRO.examMode = 1;\nWatuPRO.siteURL=\"https:\/\/sisu.ut.ee\/imageprocessing\/wp-admin\/admin-ajax.php\";\nWatuPRO.emailIsNotRequired = 0;\nWatuPRO.perDecade = 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