We first derive a 3-dimensional impossible polycube by forcibly deforming the projection of a 3-dimensional polycube. This procedure is extended into n(≥4)-space to construct n-dimensional impossible polycubes represented in 2or 3-space. They are useful as fundamental grid patterns for imaging various n-dimensional impossible figures in our 3-space. On 2-space, especially, each pattern can be c...

If it is impossible to capture all the image in one scan with the available equipment, a montage can be made from separately scanned pieces. We describe an automatic mosaicing process for document images. The image shifts are found by a correlation technique, using an image pyramid and sequential similarity to reduce computation time. Image placement and overlap is used to reject incorrect solu...

one of the most important information in urban forestry is acquaintance of urban landscape’s area or proportion. nowadays, in several countries variable methods are used to achieve this aim. since there is not any complete method to study urban forest’s status in iran, it is impossible to exert authentic management for these resources. hence, in this research, sampling methods and ikonos satell...

abstraction shigeo fokuada is one of the geniuses of contemporary graphic designers of japan. he was born in tokyo in 1932. after finishing his studies in national university of fine arts & music (1956), he worked in many fields of professional graphic design and his poster designs gained world reputation. he as a representative of avant-garde graphic design, with increasing international atten...

The interest on acquiring player and ball data during soccer games is increasing in several domains such as media or training. Consequently, tracking systems are becoming widely used for live data gathering. However, due to costs, stadium infrastructure, media rights etc. there is a trend for stand-alone mobile low-cost soccer tracking systems. The drawback of such systems is that generally onl...

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JPEG is probably the most widely used image compression standard in taking digital pictures, e.g., in most digital cameras. As a result, synthetic images by the trick operation of copy-paste are usually from and to JPEG images. Realizing that it might be impossible to find a method that is universal for all kinds of forgeries, we proposed a novel blind approach to detect copy-paste trail in doc...