Comparing 2 jpeg using Labwindows

Hi guys,.

Is there a way to compare 2 JPG files and determine if tey are different?

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Hello again,

I looked into this again this morning.  If you open the help of LabWindows CVI and search for "jpg". You get a handful of results.  You will want to click on the article titled, "with the help of Bitmap objects.  The Bitmap is a two-dimensional pixel grid that represents an image and a bitmap can be created in multiple types of images (including the .jgp).  You want to create a bitmap for each file .jpg and trace through each value in the grid programmatically, subtracting each value of its corresponding value bitmap and store the result in a new array of result.  Then just check the new bitmap that stores the result of the subtraction for values not null determine if files match and to what extent.

Try that and let me know how it goes!

Tags: NI Software

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