Method for measuring performance parameters and detecting bad pixels of an infrared focal plane array module

A method for detecting bad pixels of an infrared focal plane array module, performed by an infrared imaging camera unit and a computer, wherein the infrared imaging camera unit has an infrared focal plane array (IRFPA) module and is connected to the computer, the infrared focal plane array module serves to detect a black body radiation source, and the computer serves to perform image division and analysis of performance parameters on images acquired by the infrared imaging camera unit, the method comprising steps of:

• capturing continuous digital images from the IRFPA module;
• performing image division on each of the continuous digital images to generate multiple divided digital images with each divided digital image corresponding to a response area of the continuous digital image;
• measuring a gain value of each pixel in each divided digital image to generate a gain table associated with the divided digital image after two-point correction is applied to the IRFPA module;
• and
• defining a pixel in the IRFPA module as a bad pixel if a gain value in the gain table corresponding to the pixel is less than or equal to zero.

A method for detecting bad pixels of an infrared focal plane array module, performed by an infrared imaging camera unit and a computer, wherein the infrared imaging camera unit has an infrared focal plane array (IRFPA) module and is connected to the computer, the infrared focal plane array module serves to detect a black body radiation source, and the computer serves to perform image division and analysis of performance parameters on images acquired by the infrared imaging camera unit, the method comprising steps of:

• capturing continuous digital images from the IRFPA module;
• performing image division on each of the continuous digital images to generate multiple divided digital images with each divided digital image corresponding to a response area of the continuous digital image;
• measuring an offset value of each pixel in each divided digital image to generate an offset table associated with the divided digital image after two-point correction is applied to the IRFPA module;
• and
• defining a pixel in the IRFPA module as a bad pixel if an offset value in the offset table corresponding to the pixel is greater than an upper limit of a gray-level dynamic range of the IRFPA module or less than a lower limit of the gray-level dynamic range of the IRFPA module.

A method for detecting bad pixels of an infrared focal plane array module, performed by an infrared imaging camera unit and a computer, wherein the infrared imaging camera unit has an infrared focal plane array (IRFPA) module and is connected to the computer, the infrared focal plane array module serves to detect a black body radiation source, and the computer serves to perform image division and analysis of performance parameters on images acquired by the infrared imaging camera unit, the method comprising steps of:

• capturing continuous digital images from the IRFPA module;
• performing image division on each of the continuous digital images to generate multiple divided digital images with each divided digital image corresponding to a response area of the continuous digital image;
• measuring a temporal noise value of each pixel in each divided digital image;
• calculating a mean value of the temporal noise values of all the pixels in the divided digital image;
• and
• defining a pixel of the IRFPA module as a bad pixel if the temporal noise value of any pixel in the divided digital image corresponding to the pixel of the IRFPA module is greater than or equal to β folds of the mean value.

A method for detecting bad pixels of an infrared focal plane array module, performed by an infrared imaging camera unit and a computer, wherein the infrared imaging camera unit has an infrared focal plane array (IRFPA) module and is connected to the computer, the infrared focal plane array module serves to detect a black body radiation source, and the computer serves to perform image division and analysis of performance parameters on images acquired by the infrared imaging camera unit, the method comprising steps of:

• setting a black body temperature of the black body radiation source at a lower temperature, an intermediate temperature and an upper temperature, capturing 100 14-bit digital images from the IRFPA module, acquiring 64 image arrays at each of the lower temperature and the upper temperature, and after taking a temporal average of the 64 image arrays at each of the lower temperature and the upper temperature, acquiring a new image array and taking a spatial average of the new image array to get a mean responsivity value of the IRFPA module at each of the lower temperature and the upper temperature;
• altering the black body temperature to the intermediate temperature and continuously capturing 100 images, taking the temporal average of the 100 images to obtain an average image array at the intermediate temperature, and calculating a standard deviation of the average image array to obtain a spatial noise value of the IRFPA module;
• and
• defining a pixel of the IRFPA module as a bad pixel if the standard deviation of the pixel is beyond a range of the mean value ±β*the standard deviation.