[問題] 圖片選轉已回收

看板MATLAB作者whiteivan (quiet)時間17年前 (2008/12/04 00:27)推噓0(0推 0噓 2→)

留言2則, 2人參與討論串1/1

想請教如何讓圖片選轉呢而且不會有雜訊我有一段程式再做選轉時都會有雜訊雖然它可以讓圖片回正但是雜訊無法去除以下是我的程式 function correctedImage = RotationCorrection(im) % This function gets a rotated image and corrects its clockwise or % counterclockwise rotation. It can be useful for enhancing the output % images of desktop scanners. % % Usage: please refer to 'example.m' script. % % See also: EDGE, BWMORPH, RADON, IMROTATE % % Original version by Amir Hossein Omidvarnia, October 2007 % Email: aomidvar@ece.ut.ac.ir %%%%% Convertion of input image into a gray scale image.... if( ~isgray(im)) grayImage = rgb2gray(im); else grayImage = im; end %%%%% %%%%% Edge detection and edge linking.... binaryImage = edge(grayImage,'canny'); % 'Canny' edge detector binaryImage = bwmorph(binaryImage,'thicken'); % A morphological operation for edge linking %%%%% %%%%% Radon transform projections along 180 degrees, from -90 to +89.... % R: Radon transform of the intensity image 'grayImage' for -90:89 degrees. % In fact, each column of R shows the image profile along corresponding angle. % xp: a vector containing the radial coordinates corresponding to each row of 'R'. % Negative angles correspond to clockwise directions, while positive angles % correspond to counterclockwise directions around the center point (up-left corner). % R1: A 1x180 vector in which, each element is equal the maximum value of Radon transform along each angle. % This value reflects the maximum number of pixels along each direction. % r_max: A 1x180 vector, which includes corresponding radii of 'R1'. theta = -90:89; [R,xp] = radon(binaryImage,theta); [R1,r_max] = max(R); %%%%% %%%%% Line detection.... % This section performs a Hough-like search. It finds maximum value of Radon % transform over all radii and angles in angles greater than 50 or % less than -50. First detected angle indicates the slope of the upper bond of the image. theta_max = 90; while(theta_max > 50 || theta_max<-50) [R2,theta_max] = max(R1); % R2: Maximum Radon transform value over all angles. % theta_max: Corresponding angle R1(theta_max) = 0; % Remove element 'R2' from vector 'R1', so that other maximum values can be found. theta_max = theta_max - 91; end correctedImage = imrotate(im,-theta_max); % Rotation correction correctedImage(correctedImage == 0) = 255; % Converts black resgions to white regions 請大大幫我看一下如何去除雜訊或是有其他選轉的方法可以讓圖片自動回正並且沒有雜訊小弟感激不盡！ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.111.80.31