An image created by defining points and curves is called what?

An image created by defining points and curves is known as a vector image. Vector images are based on mathematical expressions, which means they can be scaled to any size without losing quality or becoming pixelated. This scalability is particularly useful in graphic design for creating logos, icons, and illustrations, where clarity and sharpness are essential, regardless of the size at which the image is displayed.

In contrast, raster images, which include pixel images as a subset, are made up of individual pixels and can suffer from a loss of quality when resized. Raster graphics are more suited for complex images like photographs, whereas vector graphics excel in representing simpler, more geometric designs.

3D images depict three-dimensional objects and are fundamentally different in structure and usage compared to vector images, making them not applicable in this context. Understanding the differences between these various types of images is essential for effective use of graphic design applications like Photoshop.