公开(公告)号：US20220172378A1

公开(公告)日：2022-06-02

申请号：US17600288

申请日：2019-04-03

Applicant: NEC Corporation

Inventor： Shreya SHARMA ,  Masato TODA

IPC: G06T7/246

Abstract: An object is to provide an image processing apparatus capable of appropriately detecting changes of a target object. An image processing apparatus may include: object-driven feature extractor means to extract relevant features of target object from input images; a feature merger means to merge the features extracted from the input images into a merged feature; a change classifier means to predict a probability of each change class based on the merged feature; an object classifier means to predict a probability of each object class based on the extracted features of each image; a multi-loss calculator means to calculate a combined loss from a change classification loss and an object classification loss; and a parameter updater means to update the parameters of the object-driven feature extractor means.

公开(公告)号：US20210063565A1

公开(公告)日：2021-03-04

申请号：US16958339

申请日：2017-12-28

Applicant: NEC CORPORATION

Inventor： Shreya SHARMA ,  Yuzo SENDA ,  Hirofumi AOKI ,  Kenta SENZAKI

IPC: G01S13/90 ,  G06N20/10 ,  G01S7/41 ,  G01S7/40

Abstract: An object is to provide an image processing apparatus capable of appropriately distinguishing various object types. An image processing apparatus (1C) comprising: detector means (11) for detecting objects in an input SAR image and generating object chips; projection calculator means (12) for calculating projection information of each object using SAR geometry; feature learner means (14) for learning, for each object, a relation between an object chip and its projection information, and thereby generating learnt features of object chips; and classifier means (15) for classifying object chips into classes based on the learnt features of object chips.

公开(公告)号：US20220254149A1

公开(公告)日：2022-08-11

申请号：US17603404

申请日：2019-04-17

Applicant: NEC Corporation

Inventor： Shreya SHARMA ,  Masato TODA

IPC: G06V10/774 ,  G06V10/48 ,  G06V10/44

Abstract: An object is to provide an image processing apparatus capable of appropriately distinguishing changes in an area that have occurred over a period of time. An image processing apparatus may include: a difference image generator means to generate a difference image from input SAR images; an intensity change feature extractor means to extract an intensity-based change feature from the difference image; a speckle change feature extractor means to extract speckle-based change features from the input SAR images; a combined feature extractor means to combine the intensity change feature and the speckle change feature to generate a complete representation of changes; and a classifier means to classify the pixels in several change classes using the combined feature and output a change map.