Counting method, a counting device and a counting system and a pixel array using the counting device

A counting device, comprising:

• a storage module comprising a plurality of storage units in cascade interconnection;
• and
• an arithmetic module;
• wherein the plurality of storage units are configured to store a plurality of cumulative count values;
• the plurality of storage units are configured as at least one group of storage units, and in each group of storage units, the number of the storage units is greater than the number of the storage units storing the cumulative count values;
• the arithmetic module is connected to a first group of storage units and a last group of storage units;
• and is configured for calculation according to a received count value and an added cumulative count values input through the last group of storage units, so as to obtain a current added cumulative count values of an object, and output the current cumulative count value of the object to the first group of storage units;
• wherein the plurality of cumulative count values are end-around shifted to the arithmetic module for calculation with a corresponding count value until counting is completed;
• and a plurality of current added cumulative count values stored in the storage module are used as a plurality of cumulative counting results corresponding to the object.