Effective number of pixels

The effective pixel number in English is Effective Pixels. Unlike the largest pixel, the effective pixel number refers to the pixel value that really participates in photoreceptive imaging. The value of the highest pixel is the real pixel of the light-sensing device. This data usually contains the non-imaged portion of the light-sensing device, and the effective pixel is the value converted at the zoom magnification of the lens. Take Minolta's DiMAGE7 as an example, the CCD pixel is 5.24 Megapixels because a portion of the CCD does not participate in imaging, and the effective pixel size is only 4.9 million.

The storage of digital pictures is generally based on pixels, and each pixel is the smallest unit in a digital picture. The larger the pixel, the larger the area of ​​the picture. To increase the size of a picture, if there is no more light entering the photosensitive device, the only way is to increase the area of ​​the pixel, which may affect the sharpness and sharpness of the picture. Therefore, with the same pixel area, the digital camera can obtain the largest picture pixels, ie, effective pixels.

When a user purchases a digital camera, he or she usually sees that the business advertises “maximum pixels reach XXX” and “effective pixels reach XXX”. What should the user choose? When choosing a digital camera, you should pay attention to how effective the digital camera is. The effective pixel value is the key to determining the picture quality.