When dealing with images that contain line art or lines of high contrast, you may want to protect yourself from the less than the desirable effect of pixelation when an image is over scaled. The BCubic plug-in introduces three bi-cubic algorithms. Each is useful in different contexts of its respective type. It is very easy to find the best adjustment to your specific scenario.
Note: This plug-in is located in: Plugins -> Shader -> PixelFX