I have about 3000 vertical images that I need resized to 600x600 pixels each. I've compressed a few using Photoshop where I have duplicated the image and then Gaussian blurred it to cover the background like you see in the image below.
I believe this is how Instagram works with vertical images.
Can I program Photoshop to do this automatically or is there any other software? All the images are in a single folder.
If the blur background isn't possible a light shade of grey would do too.