writing a image to folder

I want to write a image to folder,i have did as

pickind='bmp'
path ='E:\rh4frames\';
files = dir(fullfile(path,'*.jpg'));
image = ((imread(fullfile(path,files(2).name))));

%%some process
strtemp=strcat('E:\rh4frames\',int2str(2),'.',pickind);
imwrite(new_image1,strtemp)

i have taken 2nd image from folder done some operation and want to replace this this into the folder,in which image was read say 2,the second image must be replaced my this modified image

please help

Answer 1

[Walter Roberson]

strtemp = fullfile(path, ['2.',pickind]);

Or if you want to overwrite the original,

strtemp = fullfile(path, files(2).name);