Wide dynamic range hardware apparatus and photographing apparatus including the same
AssigneeSamsung Electronics Co., Ltd.
InventorSoo-kyung Joo
Life of this patent
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Abstract
A wide dynamic range (WDR) hardware apparatus and a photographing apparatus including the WDR hardware apparatus are provided where the WDR unit applies weight coefficients to a luminance signal of a small size image having a first exposure time and a luminance signal of a small size image having a second exposure time longer than the first exposure time. The system combines the luminance signals applied weight coefficients, applies weight coefficients to a luminance signal of an original size image having the first exposure time and a luminance signal of an original size image having the second exposure time, and combines the luminance signals applied weight coefficients.
Claims15
A wide dynamic range (WDR) hardware apparatus comprising:
- a first multiplier for multiplying a weight coefficient to a luminance signal of a small size image having a first exposure time and a luminance signal of an original size image having the first exposure time and input at a predetermined time difference from the small size image;
- a second multiplier for multiplying a weight coefficient to a luminance signal of a small size image having a second exposure time longer than the first exposure time and a luminance signal of an original size image having the second exposure time and input at a predetermined time difference from the small size image;
- and
- an adder for generating a first combination signal by adding the luminance signal of the small size image having the first exposure time to which the weight coefficient is multiplied and the luminance signal of the small size image having the second exposure time to which the weight coefficient is multiplied, and generating a second combination signal by adding the luminance signal of the original size image having the first exposure time to which the weight coefficient is multiplied and the luminance signal of the original size image having the second exposure time to which the weight coefficient is multiplied.
A photographing apparatus comprising:
- an image pickup device for obtaining an image having different exposure times;
- and
- a WDR unit for applying weight coefficients to a luminance signal of a small size image having a first exposure time and a luminance signal of a small size image having a second exposure time longer than the first exposure time, combining the luminance signals applied weight coefficients, applying weight coefficients to a luminance signal of an original size image having the first exposure time and a luminance signal of an original size image having the second exposure time, and combining the luminance signals applied weight coefficients.
Dependencies are inferred from the claim text.