If you want even more control over your image resolution, you can use Super Resolution in Photoshop. After you apply Super Resolution, try fine-tuning your picture with Sharpening, Noise Reduction, and Texture to get it exactly how you want it.
But maybe you need to make a big change to the size of your original image, or you have to add a specific number of new pixels. That’s when traditional resampling is your best choice. Whether you resample or use Super Resolution as your first step, this process can help you create whatever image sizes and resolutions you need.
There are two methods you can try. Use the first to change image size and number of pixels independently, or go with the second method to only change one at a time and have Photoshop do the rest for you.