A retrieval block refers to impaired accessibility in retrieving target information when semantically related information is presented (or retrieved) prior to target retrieval. Research concerning retrieval blocks is reviewed in this paper. Evidence for such blocks occurs in a variety of situations, including both episodic and semantic memory tasks. Retrieval blocks have been most thoroughly st...

In this paper, we propose new texture features, block difference of inverse probabilities (BDIP) and block variation of local correlation coefficients (BVLC), for content-based image retrieval and then present an image retrieval method based on the combination of BDIP and BVLC moments. BDIP uses local probabilities in image blocks to measure local brightness variations of an image well. BVLC us...

As the inaccuracy of current image segmentation methods, it’s unavoidable for the objects with discrepant components to be segmented into different regions. As a result, good image retrieval performance could not be achieved by those region-based image retrieval approaches. Furthermore, the complexity of image segmentations is also an unmanageable issue in the scenarios with complex backgrounds...

A novel algorithm based on running sub-blocks with different similarity weights is proposed for object-based image retrieval. By splitting the entire image into certain sub-blocks, we use color region information and similarity matrix analysis to retrieval images under the query of special object. 2003 Elsevier Science B.V. All rights reserved.

In a companion paper (R. L. Buckner et al., 1998, NeuroImage 7, 151–162) we used fMRI to identify brain areas activated by episodic memory retrieval. Prefrontal areas were shown to differentiate component processes related to retrieval success and retrieval effort in block-designed paradigms. Importantly, a right anterior prefrontal area was most active during task blocks involving greatest ret...