Using irFanView to batch edit images
I recently decided to repurpose a product and turn it into a book and Kindle version. The Kindle version had no real issues with images since they get down sampled anyway, but the printed book needed to have the images at at least 300 dpi (dots per inch). If not the images would almost certainly be grainy, and I don’t want that. Most screen capture software saves the images at 96 dpi or sometimes 72 dpi. I started using Photoshop and taking each image and making it 384 dpi by using the bicubic sampling functions. It was a pain. First, change the image type to indexed color, then upscale, downsize (the images get really big), then change back to RGB. Do that for 50 images, well, you get the idea.