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Batch processing of images using Photoshop

Sometimes you have a bunch of images or photos and you want to apply the same filters or changes to all of them. Changes or filters like resizing, rotating, cropping or increasing the contrast of the image. So why waste time doing this manually with each image if you can automatize all the work with a batch process and tell photoshop to apply this changes to all the files in a folder with just one click.

Photoshop’s batch processes are defined in a similar fashion as Microsoft Office’s macros. You tell Photoshop to start recording your actions so that the application knows which steps to follow, and when you’re done you just push stop to end the thing.

Let’s say I want a batch process to resize the photos of last night’s party because my friend’s brand new camera takes pictures of 14Mpx and I’m happier with a 5Mpx size.

Open one of the aforementioned photos using photoshop. Go to the Window menu and select Actions. A small window should appear.

In that window click on the Create new action button (the one beside the trash can) give a meaningful name to your custom batch process (Photo resizing) and store it under the Custom category. From this point on until you click the stop button in the actions window, all the actions you perform to the image will be recorded.

We want to resize the image so we choose Image and then Image size… There we enter the desired size and tick the Restrict proportions option. Finally, we choose File and Save as… (in this step you can choose to save the file in a different format from the original or even change the compression ratio applied to your jpg images) and we’re done.

Once you’ve recorded all the actions of your batch process click on the stop button. If you click in your custom batch process you can review the sequence of actions that’s recorded in the process and modify them if you want so.

Now that we have our custom batch process how do we apply it?

Go to File and then choose Automatize > Batch… a new window should appear. There you must select the action set you will be using and the batch process you want to repeat. Choose the folder in which you left those weighty party photos and another folder to leave the resized results. Click OK and relax while Photoshop saves you lot’s of time in resizing tasks.

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