公开(公告)号：US20250088752A1

公开(公告)日：2025-03-13

申请号：US18827047

申请日：2024-09-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Seungwan JEON ,  Eunji YONG ,  Dongyoung SONG ,  Dongoh KIM ,  Sungsu KIM ,  Yitae KIM ,  Kichrl PARK

IPC: H04N23/71 ,  H04N23/741

Abstract: A method of operating an electronic device includes receiving a plurality of reference code values respectively corresponding to a plurality of reference images captured by an image sensor during different exposure times, receiving a plurality of target code values corresponding to a target image captured by the image sensor, estimating an inverse camera response function (CRF) by adjusting a scale of the plurality of reference code values so that the scale of the plurality of reference code values is equal to a scale of the inverse CRF, wherein the inverse CRF estimates radiance corresponding to the plurality of reference code values, generating a radiance map based on the plurality of reference code values and the inverse CRF, and measuring an effective dynamic range (DR) length of the image sensor based on the radiance map and the plurality of target code values.

公开(公告)号：US20250086962A1

公开(公告)日：2025-03-13

申请号：US18772990

申请日：2024-07-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Subin HAN ,  Seungwan JEON ,  Sara LEE ,  Sungsu KIM ,  Yitae KIM ,  Heeshin KIM ,  Kichrl PARK ,  Yugyung LEE

IPC: G06V10/98 ,  H04N9/64 ,  H04N25/611

Abstract: A method for evaluating performance of an image signal processor according to various example embodiments includes: selecting at least two target colors from an original image generated by the image signal processor; defining a true color range in each of the target colors and identifying at least one false color pixel having a color deviating from the true color range in the original image; generating a reference image by changing a color of the false color pixel; and calculating a color error between the original image and the reference image.