No bo na monitorze porownuja 1:1, a odbikti to 20x30cmZamieszczone przez MMM
Tu masz odpowiedz:
_____
"Is DxOMark Sensor computed from on-screen measurements (1:1) or from prints (8Mpix)?"
DxOMark Sensor values are computed from the measurements from prints equivalent to 8Mpix. We chose “on print” measurement rather than “on screen” in order to better compare cameras having different numbers of pixels.
For example, consider two cameras: camera A (8Mpix), and camera B (16Mpix). As pixels of camera B will be smaller than those of camera A, it is expected that camera B will have more noise than camera A when images are viewed on screen at 1:1. However, it is always possible to downsample the 16Mpix of camera B to 8Mpix to reduce noise, with the result that the camera B’s images of camera B may be less noisy than camera A’s.
This example shows that comparing the image quality of the two cameras with on-screen 1:1 measurements would have been unfair to the high resolution camera, which is why we decided to compare the images under the same viewing conditions.
8Mpix print images mean that measurements can be normalized against resolution, so that all cameras can be compared fairly.
Even though on screen measurements cannot be used for comparing cameras with different resolutions, these measurements are still useful for assessing a camera’s absolute RAW image quality.
________
Odpowiedz z cytatem