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LF2301JC55 Arkusz danych(PDF) 11 Page - LOGIC Devices Incorporated |
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LF2301JC55 Arkusz danych(HTML) 11 Page - LOGIC Devices Incorporated |
11 / 18 page DEVICES INCORPORATED Video Imaging Products 2-11 LF2301 Image Resampling Sequencer 08/16/2000–LDS.2301-H TABLE 10. ITS OUTPUTS FOR PASS 1 OF TWO-PASS Cycle x y CAx (HEX) CAy (HEX) u v INIT ACC UWRI ENDx ENDy DONE 1 0 0 00 00 x x 101000 2 0 0 00 00 x x 001000 3 0 0 00 00 x x 001000 4 0 0 00 00 x x 001000 5 1 0 01 01 x x 010100 6 2 0 02 02 x x 011100 7 1 0 00 00 55001100 8 2 0 01 01 55010000 9 3 0 02 02 55011000 10 20 00 00 65001000 11 30 01 01 65010010 12 40 02 02 65011010 13 01 00 00 75001010 14 11 01 01 75010110 15 21 02 02 75011110 16 11 00 00 56001110 17 21 01 01 56010010 18 31 02 02 56011010 19 21 00 00 66001010 20 31 01 01 66010001 21 41 02 02 66011001 22 00 00 00 76001001 23 10 01 01 76010101 24 20 02 02 76011101 Pass 1 of Two-Pass Operation Pass 1 of the two-pass operation performs horizontal filtering on an image as shown in Figure 9. This mode is selected by loading M1-0 with “01.” In this example, a horizontal filter with a kernel size of 3 pixels is desired. Loading K3-0 with “0010” selects a kernel size of 3. The first pixel selected is determined by x0 and y0. In this example, the first pixel is (0,0). In this case, the LF2301s should address consecutive pixels during each pixel walk. For this to occur, FOV must be set to 1 (F2-0 loaded with “001”). After the last pixel of a pixel walk has been selected, the next pixel address is determined by adding dx/du to the current X address and by adding dy/ du to the current Y address (unless the kernel just completed was the last for that line). At the end of the first pixel walk, pixel (2,0) is addressed. Since the first pixel of the next pixel walk should be (1,0), dx/du is selected to be -1 and dy/du is selected to be 0. After the last pixel of the last pixel walk on the first line has been selected, the first pixel address of the second line is determined by adding dx/dv to x0 and by adding dy/dv to y0. Since the first pixel of the first pixel walk on the second line should be (0,1), dx/dv is selected to be 0 and dy/dv is selected to be 1. Second order differential terms are not used in this filter and are therefore set to 0. TABLE 9. PARAMETER REGISTERS ADDR Row (HEX) Column (HEX) 0000 000 000 0001 FFF FFF 0010 000 000 0011 040 140 0100 000 000 0101 1FF 000 0110 000 000 0111 200 201 1000 000 000 1001 000 000 1010 000 000 1011 000 000 1100 000 000 1101 000 000 1110 005 005 1111 006 006 UMIN and VMIN are both selected to be 5. UMAX and VMAX are both selected to be 6. Table 9 shows the values loaded into all Parameter Registers. Table 10 shows the ITS outputs for the Pass 1 of a Two-Pass operation. 1 = 1st pixel of 1st walk, 2 = 1st pixel of 2nd walk, etc. -1 1234 0 1 2 3 123 6 45 7 0 FIGURE 9. PASS 1 OF TWO-PASS |
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