Dark image enhancement

Method for enhancing images for metrological applications comprising:

• providing a sensor image
• representing a scene of interest with initial metrological information for determining position and/or orientation of at least one object within the scene of interest,
• having a sensor image geometric correctness, and
• being described by an image parameter provided by a scoring function evaluated on the sensor image, the image parameter in particular relating to brightness and/or noise and/or resolution and/or color fidelity and/or vividness of colors of the sensor image, the image parameter having an initial image parameter value,
• providing an enhanced image generated from the sensor image
• being described by the image parameter having an enhanced image parameter value, the enhanced image parameter value in particular relating to higher brightness and/or reduced noise and/or higher resolution and/or higher color fidelity and/or more vivid colors than the sensor image, and
• having a processed image geometric correctness, the processed image geometric correctness relating to distorted metrological information representing a loss of initial metrological information caused by an image processing with a neural network, the processed image geometric correctness being lower than the sensor image geometric correctness,
• providing a geometric correction image
• having an image geometric correctness higher than the processed image geometric correctness,
• showing at least a part of the scene of interest,
• at least partially reducing the loss of initial metrological information in the distorted metrological information by fusing the enhanced image with the geometric correction image.