How to calculate the contrast value?

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dneprovsskin2021-06-08 21:06:11

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dneprovsskin, 2021-06-08 21:06:11

Maybe someone knows how to solve this issue, it is very necessary. Object brightness I0=40. The background occupies the brightness range (20, 36). Calculate object contrast given 6-bit brightness quantization. Calculate the changed value of the object contrast after linear stretching of the brightness range (20, 40).

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