Infrared Training Center Level 1 Practice Exam

Resolution is about the amount of actual detail captured, limited by the sensor’s pixel count and how the optics sample the scene. Digital zoom doesn’t add new information; it crops or magnifies the existing image or uses interpolation to fill in extra pixels. That magnification increases the size of the image without creating new detail, often making edges softer and reducing sharpness. So the true spatial resolution does not improve with digital zoom. Some cameras use advanced processing to produce crisper images from multiple frames, but that isn’t increasing the sensor’s native resolution—it’s more about reconstruction, not adding real detail.