| 摘要 |
The invention concerns a method for correcting noise level in a digitised image detector comprising photosensitive points (D1 to D27, C1 to C27) arranged in lines (L1 to L3) and columns (C11 to C12). Said points are divided in each line into "detecting" points (D1 to D9) and "correcting" points (C1 to C7). The detecting points deliver a measurement value (Vm1 to Vm9) a function of a light information to which they are exposed. The correcting points deliver a darkness value (Vob) for correcting the measurement values (Vm1 to Vm9). In at least one line the detecting points (D1 to D9) are divided into at least two groups (Gd1 to Gd3) and the measurement values (Vm1 to Vm9) are corrected with a first or second correction value (Vc1, Vc2) according to the group from which they are derived. The invention is applicable to digitised images.
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