def select_data()

in lib/dataset/JointsDataset.py [0:0]


    def select_data(self, db):
        db_selected = []
        for rec in db:
            num_vis = 0
            joints_x = 0.0
            joints_y = 0.0
            for joint, joint_vis in zip(
                    rec['joints_3d'], rec['joints_3d_vis']):
                if joint_vis[0] <= 0:
                    continue
                num_vis += 1

                joints_x += joint[0]
                joints_y += joint[1]
            if num_vis == 0:
                continue

            joints_x, joints_y = joints_x / num_vis, joints_y / num_vis

            area = rec['scale'][0] * rec['scale'][1] * (self.pixel_std**2)
            joints_center = np.array([joints_x, joints_y])
            bbox_center = np.array(rec['center'])
            diff_norm2 = np.linalg.norm((joints_center-bbox_center), 2)
            ks = np.exp(-1.0*(diff_norm2**2) / ((0.2)**2*2.0*area))

            metric = (0.2 / 16) * num_vis + 0.45 - 0.2 / 16
            if ks > metric:
                db_selected.append(rec)

        logger.info('=> num db: {}'.format(len(db)))
        logger.info('=> num selected db: {}'.format(len(db_selected)))
        return db_selected