Sensing apparatus, method for sensing energy field and camera

Abstract

A camera includes a set of sensing elements. Each sensing element is arranged at an image plane in an energy field to measure a magnitude and sign of a local gradient of the energy field. Each sensing element includes at least two energy intensity sensors. Each energy sensor measures a local intensity of the energy field. Logarithms of the intensities are subtracted from each other to obtain the magnitude and sign of the gradients. A Poisson equation is solved using the gradients to obtain an output image of the energy field.

Description

technical field [0001] The present invention relates generally to sensing energy fields, and more particularly to producing images using cameras. Background technique [0002] camera [0003] There are two well known techniques for generating digital images. In the first technique, analog film is exposed to an energy field, such as visible light. The film is developed and digitized using a scanner. The resulting image includes pixel values ​​reflecting the intensity distribution of the energy field. The image can also show the frequency distribution, or 'color' of the energy field. [0004] In the second technique, an array of digital sensors is arranged on the image plane in the energy field. These sensors directly measure the intensity of the energy. The sensor is also capable of frequency selection through the use of filters. As an advantage, the second technique produces immediate results and does not consume any film. For these and other reasons, digital cameras...

AI Technical Summary

Problems solved by technology

However, like conventional cameras, the quantization scale chosen for a logarithmic response camera must span the scene intensity I s The entire dynamic range of , and all scene intensities not within that range, are irretrievably lost

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