可以后退的的截图小工具

# -*- coding: utf-8 -*-
"""
Created on Fri Jan 17 09:01:01 2014

@author: xiaoxia
"""

# -*- coding: utf-8 -*-
"""
Created on Wed Jan 15 10:14:43 2014

@author: xiaoxia
"""
import cv2
  
#将数据存为小图片    
def fan() :  
    f=open("picture.txt","r")
    l_2=open("picture2.txt","w")
    k = []
    u = []
    for eachline in f:
        eachline = eachline.strip()
        eachline = eachline.split("   ") 
        for i in eachline:                
            i = str(i)
            k.append(i)
            if len(k) == 4:
                u.append(k)
                k = []
        
    i_mg = cv2.imread("jiangnan.jpg")
    i=0
    for picture in u :
        
        x = int(picture[0])
        y = int(picture[1])
        w = int(picture[2])
        h = int(picture[3])
        i+=1
        I_mg = i_mg[y:h,x:w]    
        c = cv2.imwrite(str(i)+".jpg", I_mg)
#    return
    
    for z in u:
        for x in z :
            x=str(x)
            l_2.write(x)
            l_2.write("   ")
        l_2.write("\n")
    l.close()
    f.close()
#####################################################################
             
def onMouseEvent(event,x,y,flags,param):  
    global startPointx     
    global startPointy   
    global flagDraw
    global i
    #鼠标左键按下响应   
    if(event==1):  #第一点
        print "Position is: %d,%d" ,x,y             
        startPointx = x 
        print type(x)
        startPointy = y  
        i=i+1
        cv2.putText(image,str(i),(startPointx,startPointy),2,1,(249,99,201))
        flagDraw = True                    
        a = str(x)
        b = str(y)
        l.write(a)
        l.write("   ")
        l.write(b)
        l.write("   ") 
           
    #鼠标移动响应   
    if(event==0):  #滑动过程
        if(flagDraw==True): 
            imgc = cv2.copyMakeBorder(image,0,0,0,0,cv2.BORDER_CONSTANT)
            cv2.rectangle(imgc, (startPointx,startPointy), (x,y), (249,99,201),2)
            #cv2.putText(imgc,(x,y),CV_FONT_HERSHEY_PLAIN,2.0,(255,0,0),thickness = 2)    
            cv2.imshow('rectangle', imgc)                
            print "EndPosition is: %d,%d" ,x,y  
            
            
    #鼠标左键抬起响应  
    if(event==4):   #第二点
        if(flagDraw==True):  
            cv2.rectangle(image, (startPointx,startPointy), (x,y), (249,99,201),2)  
            #cv2.imshow('rectangle_1', image)                
            flagDraw = False
            c = str(x)
            d = str(y)
            l.write(c)
            l.write("   ")
            l.write(d)
            l.write("   ")
########################################################################    
    
image = cv2.imread("jiangnan.jpg")   
global startPointx   
global startPointy   
global flagDraw
global i
i=0   
startPointx = 0  
startPointy = 0  
flagDraw = False
cv2.namedWindow("rectangle",cv2.WINDOW_NORMAL)
#cv2.namedWindow("rectangle_1",cv2.WINDOW_NOR
cv2.imshow('rectangle',image)


                
  
if __name__ == '__main__':  
  
    image = cv2.imread("jiangnan.jpg")
    h, w  = image.shape[:2]
    imgc = cv2.copyMakeBorder(image, 0,0,0,0, cv2.BORDER_CONSTANT)
    
   # cv2.imshow('rectangle', imgc)  
    l=open("picture.txt","w")
    f=open("picture.txt","r")
    
    while True:  
        cv2.setMouseCallback('rectangle', onMouseEvent)  #调用滑鼠
        c = cv2.waitKey()  
        if c == 27 or c == ord('q'):             
            break  
        if c == ord('w')  :
            print "w"
            l.close()
            a=[]
            b=[]
            for eachline in f:
                eachline=eachline.strip()
                eachline=eachline.split("   ") 
                for k in eachline:        
                    k=str(k)
                    b.append(k)
                    if len(b)==4:
                        a.append(b)
                        b=[]
                    
            print a
            g=a[:-1]
            print g
            l=open("picture.txt","w")
            f=open("picture.txt","r")            
            for t in g:
                for k in t :
                    k=str(k)
                    l.write(k)
                    l.write("   ")
                l.write("\n")
            print "yes:",g
            image = cv2.imread("jiangnan.jpg")
            ii=0
            for q in g:
                xa=int(q[0])
                ya=int(q[1])
                xb=int(q[2])
                yb=int(q[3])
                ii=ii+1
                cv2.putText(image,str(ii),(xa,ya),2,1,(249,99,201))
                cv2.rectangle(image, (xa,ya),(xb,yb),(249,99,201),2)                                               
                cv2.imshow('rectangle', image)

                
    l.close()
    f.close()
    cv2.destroyAllWindows()
    fan()  
    

按w可以后退