1, the realization of the difference: optical zoom is realized through the lens of the camera or video camera. Optical zoom by adjusting the focal length of the lens to change the size of the image, to achieve the object to be photographed to zoom in or out. Clear Image Zoom is realized by intercepting a portion of the image and enlarging the display to achieve a zoom effect on the image.
2. Difference in processing mode: Optical zoom is to adjust the light through the optical element of the lens to realize the zoom in or zoom out of the image. Optical zoom does not cause distortion or blurring of the image, is realized through the physical lens adjustment. Digital zoom (including clear image zoom) is achieved by processing the image through the image processor inside the camera or camcorder. Digital zoom uses image processing algorithms to zoom in or out of an image without an increase in the number of pixels in the image and with a loss of some resolution. Crisp image zoom improves the clarity of the image using image processing algorithms and is visually similar to optical zoom.