An apparatus for hot spot sensing, the apparatus comprising: - an input unit; - a processing unit; and - an output unit; wherein, the input unit is configured to provide the processing unit with an image of an object that has a hot spot, wherein image data of the image comprises image data of the hot spot, and wherein the image was acquired by a camera; wherein, the processing unit is configured to determine a number of pixels in the image corresponding to a size of the hot spot; wherein, the processing unit is configured to determine an average temperature for the hot spot, the determination comprising utilization of pixel values of the pixels in the image corresponding to the size of the hot spot and the number of pixels in the image corresponding to the size of the hot spot; wherein, the processing unit is configured to determine a surrounding temperature in the image, the determination comprising utilization of at least one pixel in the image different to the pixels in the image corresponding to the size of the hot spot; wherein, the processing unit is configured to determine a corrected temperature for the hot spot, the determination comprising utilization of a value of a correction factor, the average temperature for the hot spot and the surrounding temperature; wherein the correction factor has a plurality of possible values, and wherein the value of the correction factor used in the determination of the corrected temperature for the hot spot is determined as a function of the number of pixels in the image corresponding to the size of the hot spot; and wherein the plurality of possible values of the correction factor are determined on the basis of a plurality of calibration images of one or more hot spots acquired by the camera and/or by one more cameras that are substantially the same as the camera, and on the basis of one or more measured temperatures or reference temperatures for the one or more hot spots. - an input unit; - a processing unit; and - an output unit; wherein, the input unit is configured to provide the processing unit with an image of an object that has a hot spot, wherein image data of the image comprises image data of the hot spot, and wherein the image was acquired by a camera; wherein, the processing unit is configured to determine a number of pixels in the image corresponding to a size of the hot spot; wherein, the processing unit is configured to determine an average temperature for the hot spot, the determination comprising utilization of pixel values of the pixels in the image corresponding to the size of the hot spot and the number of pixels in the image corresponding to the size of the hot spot; wherein, the processing unit is configured to determine a surrounding temperature in the image, the determination comprising utilization of at least one pixel in the image different to the pixels in the image corresponding to the size of the hot spot; wherein, the processing unit is configured to determine a corrected temperature for the hot spot, the determination comprising utilization of a value of a correction factor, the average temperature for the hot spot and the surrounding temperature; wherein the correction factor has a plurality of possible values, and wherein the value of the correction factor used in the determination of the corrected temperature for the hot spot is determined as a function of the number of pixels in the image corresponding to the size of the hot spot; and wherein the plurality of possible values of the correction factor are determined on the basis of a plurality of calibration images of one or more hot spots acquired by the camera and/or by one more cameras that are substantially the same as the camera, and on the basis of one or more measured temperatures or reference temperatures for the one or more hot spots. wherein, the input unit is configured to provide the processing unit with an image of an object that has a hot spot, wherein image data of the image comprises image data of the hot spot, and wherein the image was acquired by a camera; wherein, the processing unit is configured to determine a number of pixels in the image corresponding to a size of the hot spot; wherein, the processing unit is configured to determine an average temperature for the hot spot, the determination comprising utilization of pixel values of the pixels in the image corresponding to the size of the hot spot and the number of pixels in the image corresponding to the size of the hot spot; wherein, the processing unit is configured to determine a surrounding temperature in the image, the determination comprising utilization of at least one pixel in the image different to the pixels in the image corresponding to the size of the hot spot; wherein, the processing unit is configured to determine a corrected temperature for the hot spot, the determination comprising utilization of a value of a correction factor, the average temperature for the hot spot and the surrounding temperature; wherein the correction factor has a plurality of possible values, and wherein the value of the correction factor used in the determination of the corrected temperature for the hot spot is determined as a function of the number of pixels in the image corresponding to the size of the hot spot; and wherein the plurality of possible values of the correction factor are determined on the basis of a plurality of calibration images of one or more hot spots acquired by the camera and/or by one more cameras that are substantially the same as the camera, and on the basis of one or more measured temperatures or reference temperatures for the one or more hot spots.