Method and system of image capture based on logarithmic conversion

摘要

Image capture based on logarithmic conversion. At least some of the illustrative embodiments are methods including capturing an image by: reading a plurality of analog signals from an array of light sensitive elements; performing logarithmic analog-to-digital conversion on the plurality of analog signals which creates a corresponding plurality of digital values; and storing representations of the plurality of digital values to a storage medium.

主权项

1. A method comprising:
capturing an image by
reading a plurality of analog signals from an array of light sensitive elements;performing logarithmic analog-to-digital conversion on the plurality of analog signals which creates a corresponding plurality of digital values, each corresponding to a digital luminance value; and storing representations of the plurality of digital values to a storage medium; prior to the capturing the image:
adjusting brightness by changing offset applied to the analog signals prior to analog-to-digital conversion; andadjusting contrast by changing gain applied to the analog signal prior to analog-to-digital conversion,wherein prior to adjusting brightness and adjusting contrast, the method further comprises capturing an image to create an initial image; and
calculating a dynamic range regarding the initial image, thecalculating performed by a processor executing a program; andwherein adjusting the brightness further comprises adjusting the brightness based on the dynamic range, the adjusting the brightness performed by the processor without user input; andwherein adjusting the contrast further comprises adjusting the contrast based on the dynamic range, the adjusting the contrast performed by the processor without user input.