What resolution does the term "15MP" refer to?

The term "15MP" stands for 15 megapixels, which directly indicates the resolution of an image. Megapixels are a measure of the pixel count in a digital image, where one megapixel equals one million pixels. A 15MP resolution means that the camera or imaging device can capture images that contain approximately 15 million individual pixels. This results in a higher level of detail and clarity in the image, which is especially valuable in surveillance and video applications where clarity is critical.

In context, this means that a camera labeled as 15MP offers a higher resolution than 4MP, 10MP, and 20MP devices, as it falls precisely at the stated 15 million pixel threshold. Higher resolutions are generally associated with better image quality, allowing for more detailed enlargements and better performance in low-light conditions. Thus, understanding that "15MP" simply refers to the resolution itself clarifies why it is the correct answer.