System and method for multispectral extraction from crosstalk profile

An electronic device comprising:

• at least one memory;
• a color filter array (CFA);
• an image sensor operatively connected to the CFA, the image sensor being configured to capture a plurality of M images respectively having a plurality of measured spectral densities in a plurality of D spectral bands;
• and
• at least one processor operatively connected to the at least one memory and the image sensor,
• wherein the at least one processor is configured to:
• measure a plurality of crosstalk values in a plurality of L pixels and in a plurality of K channels of the plurality of M images, wherein the K represents a number of pixels per a color of the CFA,
• estimate a plurality of spectral-crosstalk values by applying an estimation function to the plurality of crosstalk values, and
• control to store, in at least one of the at least one memory, the image sensor, or the at least one processor, the estimated plurality of spectral-crosstalk values,
• wherein the electronic device further comprises a flat detector operatively connected to the image sensor,
• wherein the at least one processor is further configured to:
• receive an input image having a pattern of the CFA,
• receive, from the flat detector, info on a first area of the input image, wherein the first area has a first crosstalk value,
• calculate the first crosstalk value in the first area of the input image,
• estimate a first spectral density of the first area by applying the pseudoinverse of the plurality of estimated spectral-crosstalk values to the calculated first crosstalk value, and
• control to store, in at least one of the at least one memory, the image sensor, or the at least one processor, the estimated first spectral density of the first area, and
• wherein the CFA is an up-sampled Bayer CFA.