Method for dynamic correction for pixels of thermal image array

A method for dynamic correction for pixels of thermal image array, used for a bolometer with a lens shutter, comprising:

• power-on step;
• environmental temperature measurement step comprising:
• controlling the lens shutter to be closed,
• measuring an environmental temperature value, and
• recording in a memory;
• individual resistance calculation step comprising:
• controlling the lens shutter to be closed,
• sequentially providing a reference current to thermal resistors in all pixels of an image sensor array,
• measuring corresponding resistance array values, and
• recording in the memory;
• individual current parameter calculation step comprising:
• based on the resistance array values and a rated voltage, respectively calculating a current array values, and
• recording them in the memory;
• rated voltage confirmation step comprising:
• controlling the lens shutter to be closed,
• using the environmental temperature value as a reference temperature, reading individual pixel voltage values from the image sensor array,
• providing each pixel with a corresponding individual current parameter based on the current array values, and
• confirming their conformity with the rated voltage;
• sensing step comprising:
• opening the lens shutter and within a predetermined time, and controlling the image sensor array to sense a temperature of a target object;
• reading step comprising:
• reading the current array values stored in the memory by a read-out integrated circuit,
• sequentially providing an individual current corresponding to each pixel of the image sensor array based on the corresponding individual current parameter respectively, and
• reading corresponding a measurement voltage value to obtain a measurement voltage array;
• temperature calculation step comprising:
• sequentially calculating the temperature detected by each pixel based on the difference between the measurement voltage value and the rated voltage, and
• obtaining a measurement temperature array.