Thermal health monitoring sensor
AssigneeAxis AB
InventorsThomas Winzell, Jesper Bengtsson, Mats Bylander
Life of this patent
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Abstract
Methods and apparatus, including computer program products, for detecting malfunction in a thermal camera. A first average response value is determined for a first shutter image captured by an image sensor in the thermal camera. A second average response value is determined of a second shutter image captured by the image sensor in the thermal camera. The first average response value and the second average response value are compared. In response to determining that the first average response value and the second average response value differ by more than a predetermined value, an indication of a malfunction of the thermal camera is provided.
Claims12
A method for detecting malfunction in a thermal camera, comprising:
- determining a first average response value for the individual pixels of a first shutter image captured by an image sensor in the thermal camera when the shutter is in a position blocking the image sensor;
- determining a second average response value for the individual pixels of a second shutter image captured by the image sensor in the thermal camera when the shutter is in a position blocking the image sensor and under essentially identical capturing conditions to the first shutter image;
- comparing the first average response value and the second average response value;
- and
- in response to determining that the first average response value and the second average response value differ by more than a predetermined value, providing an indication of a malfunction of the thermal camera.
A system for detecting malfunction in a thermal camera, comprising:
- a memory;
- and
- a processor,
- wherein the memory contains instructions that when executed by the processor causes the processor to perform a method that includes:
- determining a first average response value for the individual pixels of a first shutter image captured by an image sensor in the thermal camera when the shutter is in a position blocking the image sensor;
- determining a second average response value for the individual pixels of a second shutter image captured by the image sensor in the thermal camera when the shutter is in a position blocking the image sensor and under essentially identical capturing conditions to the first shutter image;
- comparing the first average response value and the second average response value;
- and
- in response to determining that the first average response value and the second average response value differ by more than a predetermined value, providing an indication of a malfunction of the thermal camera.
A non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions being executable by a processor to perform a method for detecting malfunction in a thermal camera, the method comprising:
- determining a first average response value for the individual pixels of a first shutter image captured by an image sensor in the thermal camera when the shutter is in a position blocking the image sensor;
- determining a second average response value for the individual pixels of a second shutter
- image captured by the image sensor in the thermal camera when the shutter is in a position blocking the image sensor and under essentially identical capturing conditions to the first shutter image;
- comparing the first average response value and the second average response value;
- and
- in response to determining that the first average response value and the second average response value differ by more than a predetermined value, providing an indication of a malfunction of the thermal camera.
Dependencies are inferred from the claim text.