Comparing Images

Follow Following links:

http://binodjava.blogspot.in/2009/06/how-to-compare-two-images-check-two.html

comparing images by ImageMagick apllication, can be downloaded from http://www.imagemagick.org/script/binary-releases.php
ImageMagick apllication is command-line application, therefore command for comparing two images are describe in below links
http://www.imagemagick.org/Usage/compare/
http://www.imagemagick.org/script/compare.php
you can do other stuff also with Images in this software like curving corner of image:
http://www.ibm.com/developerworks/library/l-graf2/?ca=dgr-lnxw15GraphicsLine
http://www.ibm.com/developerworks/library/l-graf/?ca=dnt-428


Look into other software also like Geeqie (http://www.freesoftwaremagazine.com/articles/compare_two_images_easily_geeqie), and another one xnview

Problem List

1) Suppose you have two columns in Excel and one record where one column has value but another column has nothing. Now you are going to paste this record into a Access database table where also has two columns. Now you want to delete this record by SQL statement. How you do it? Condition is you also supply the value of Second column in where condition of Delete statement.


Ans:  Wrong Answer: delete <tablename> where Column1='<value>' and Column2='';
                                  delete <tablename> where Column1='<value>' and Column2=null;

          Right Answer:  delete <tablename> where Column1='<value>' and Column2 is null;