Matlab to draw a rectangle in the image (box)

function [state,result]=Draw_rect (Data,pointall,windsize,showornot)% function call: [state,result]=Draw_rect (Data,pointall,windsize,showornot)%function function: Draw a rectangular frame in the image%function Input: Data is the original large image, which can be used as a grayscale image, and can be a color graph%The coordinates of the upper- left corner of the Pointall box in the larger view (each row represents a coordinate),%Note: The coordinate system in the diagram is the first column y, and the second column is X (very strange)% windsize Box size windsize=[ the, the] Indicate the length and width respectively%Showornot whether to display, default to show% function Output: state--represents the program result status% Result-result image Data% function History: V0.0@ -- on- -created by AbornifNargin <4Showornot=1; Endrgb= [255 255 0]; %Border Color Linesize=3; % border size, take 1,2，3Windsize (1,1) =windsize (1,1); Windsize (1,2) = Windsize (1,2);ifWindsize (1,1) > Size (data,1) ||... windsize (1,2) > Size (data,2) State= -1; %The Description window is too large, the image is too small, no need to get disp ('The window size is larger then image ...'); return; Endresult=data;ifSize (data,3) ==3     fork=1:3         forI=1: Size (Pointall,1)   %The Draw Border order is: upper right bottom left principle result (Pointall (i,1), Pointall (I,2):p Ointall (i,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1):p Ointall (i,1) +windsize (I,2), Pointall (I,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1) +windsize (I,2), Pointall (I,2):p Ointall (i,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1):p Ointall (i,1) +windsize (I,2), Pointall (I,2), k) = RGB (1, K); ifLinesize = =2|| Linesize = =3result (Pointall (i,1)+1, Pointall (i,2):p Ointall (i,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1):p Ointall (i,1) +windsize (I,2), Pointall (I,2) +windsize (I,1)-1, k) = RGB (1, K); Result (Pointall (i,1) +windsize (I,2)-1, Pointall (i,2):p Ointall (i,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1):p Ointall (i,1) +windsize (I,2), Pointall (I,2)-1, k) = RGB (1, K); ifLinesize = =3result (Pointall (i,1)-1, Pointall (i,2):p Ointall (i,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1):p Ointall (i,1) +windsize (I,2), Pointall (I,2) +windsize (I,1)+1, k) = RGB (1, K); Result (Pointall (i,1) +windsize (I,2)+1, Pointall (i,2):p Ointall (i,2) +windsize (I,1), k) = RGB (1, K); Result (Pointall (i,1):p Ointall (i,1) +windsize (I,2), Pointall (I,2)+1, k) = RGB (1, K); End End End Endendstate=1;ifShowornot = =1Figure ; Imshow (result); end

The following is called in the main function:

%= imread ('man_1.jpg'= [5]= [100 ,+]; [State,results] =Draw_rect (data,pointall,windsize); return;

The original image is:

The resulting image is:

Special note: The coordinate system shown in the image is not the same as what we usually use!!!

from:http://blog.csdn.net/loveaborn/article/details/8545809

Matlab to draw a rectangle in the image (box)