Effective pixels

The number of Pixels in digital cameras includes Effective Pixels and Maximum Pixels. Different from the maximum pixel, the effective pixel number refers to the pixel value that actually participates in the photographic image, while the value of the highest pixel is the actual pixel of the photographic device. This data usually includes the non-imaging part of the photographic device, while the effective pixel is the value converted under the zoom ratio of the lens.

Digital images are generally stored in pixels, the smallest unit of area in a digital image. The bigger the pixel, the bigger the image. The only way to increase the area of an image without more light entering the sensor is to increase the area of the pixel, which may affect the sharpness and sharpness of the image. Therefore, when the pixel area remains unchanged, the digital camera can obtain the largest image pixel, that is, the effective pixel.

The biggest pixel

The Maximum Pixels. The so-called Maximum pixel is obtained after interpolation operation. Interpolation operation through the digital camera in the internal DSP chip, in the need to enlarge the image using the nearest interpolation, linear interpolation and other operational methods, in the image to add the pixel needed to enlarge the image. The image quality obtained by interpolation cannot be compared with that of the real photosensitive image. The sharpness of images taken in maximum pixels is not as good as those taken in effective pixels.

Sensor:

There are two main factors for imaging of photosensitive devices: one is the area of the photosensitive devices; The second is the color depth of photosensitive devices. The larger the area of the photosensitive device is, the larger the image will be. Under the same conditions, more image details can be recorded, and the interference between each pixel is also small, so the image quality is better. But with the development of digital camera to the direction of fashion and compact, photosensitive device area can only be smaller and smaller.

The flash

The scientific name of Flash is Flash Light. Flash is also a way to increase exposure, especially in dark areas, which helps to brighten the scene.