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LF2301JC55 bảng dữ liệu(PDF) 1 Page - LOGIC Devices Incorporated |
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LF2301JC55 bảng dữ liệu(HTML) 1 Page - LOGIC Devices Incorporated |
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1 / 18 page  DEVICES INCORPORATED Video Imaging Products 2-1 LF2301 Image Resampling Sequencer 08/16/2000–LDS.2301-H u u u u u 40 MHz Clock Rate u u u u u High-Speed Image Manipulation u u u u u Maximum Image Size: 4096 x 4096 Pixels u u u u u Supports Following Interpolation Algorithms: • Nearest-Neighbor • Bilinear Interpolation • Cubic Convolution u u u u u Applications: • Video Special-Effects • Image Recognition • High-Speed Data Encoding/ Decoding u u u u u Replaces TRW/Raytheon/Fairchild TMC2301 u u u u u 68-pin PLCC, J-Lead FEATURES DESCRIPTION LF2301 Image Resampling Sequencer DEVICES INCORPORATED LF2301 BLOCK DIAGRAM SOURCE ADDRESS GENERATOR TARGET ADDRESS GENERATOR INPUT IMAGE BOUNDARY COMPARATOR ACC DONE WEN LDR B3-0 P11-0 INTER INIT NOOP END PARAMETER STORAGE CONTROL INTEGER FRACTION CZERO U11-0 UWRI X11-0 CA7-0 WALK COUNT OETA The LF2301 is a self-sequencing address generator designed to filter a two-dimensional image or remap and resample it from one set of Cartesian coordinates (x,y) into a new set (u,v). The LF2301 can resample digitized images or perform such manipula- tions as rotation, panning, zooming, and warping as well as compression in real-time. By using two LF2301s in a Image Transformation System (ITS), nearest-neighbor, bilinear interpola- tion, and cubic convolution algo- rithms, with kernel sizes up to 4 x 4 pixels, are all possible (see Figure 1). This system can also implement simple static filters with kernel sizes up to 16 x 16 pixels. DETAILS OF OPERATION Most video applications use a pair of LF2301s in tandem to construct an ITS. One LF2301 is the row coordinate generator (x to u) and the other is the column generator (y to v). External RAM is needed for storage of the interpolation coeffi- cient lookup table, as well as for buffers of the source and destination images. An external Multiplier- Accumulator is required when performing interpolation or imple- menting static filters. The ITS is capable of performing the general second-order coordinate transformation of the form: x(u,v) = Au2+Bu+Cuv+Dv2+Ev+F y(u,v) = Gu2+Hu+Kuv+Lv2+Mv+N where parameters A through N of the transform are user-defined. The system steps sequentially through each pixel in the “target” image lying within a user-defined rectangle. For each “target” pixel at (u,v), the LF2301 points to a corresponding “source” pixel at (x,y). |
Số phần tương tự - LF2301JC55 |
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Mô tả tương tự - LF2301JC55 |
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