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MT9P031 Datasheet(PDF) 15 Page - ON Semiconductor |
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MT9P031 Datasheet(HTML) 15 Page - ON Semiconductor |
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15 / 32 page  MT9P031 www.onsemi.com 15 Readout Modes Subsampling By default, the resolution of the output image is the full width and height of the FOV as defined in “Window Control”. The output resolution can be reduced by two methods: Skipping and Binning. Row and column skip modes use subsampling to reduce the output resolution without reducing FOV. The MT9P031 also has row and column binning modes, which can reduce the impact of aliasing introduced by the use of skip modes. This is achieved by the averaging of 2 or 3 adjacent rows and columns (adjacent same-color pixels). Both 2X and 4X binning modes are supported. Rows and columns can be binned independently. Skipping Skipping reduces resolution by using only selected pixels from the FOV in the output image. In skip mode, entire rows and columns of pixels are not sampled, resulting in a lower resolution output image. A skip 2X mode skips one Bayer pair of pixels for every pair output. Skip 3X skips two pairs for each one pair output. Rows and columns are always read out in pairs. If skip 2X mode is enabled with otherwise default sensor settings, the columns in the output image correspond to the pixel array columns 16, 17, 20, 21, 24, 25... . Figure 14. Eight Pixels in Normal and Column Skip 2X Readout Modes G0 R0 [11:0] [11:0] G1 R1 [11:0] G2 [11:0] R2 [11:0] [11:0] G3 R3 [11:0] G0 [11:0] R0 [11:0] G2 [11:0] R2 [11:0] [11:0] LV Normal readout DOUT[11:0] LV Column skip 2X readout DOUT[11:0] Skipping can be enabled separately for rows and columns. To enable skip mode, set either or both of Row_Skip and Column_Skip to the number of pixel pairs that should be skipped for each pair used in the output image. For example, to set column skip 2X mode, set Column_Skip to “1”. The size of the output image is reduced by the skip mode as shown in the following two equations: (eq. 1) W + 2 ceil((Column_Size ) 1)) (2 (Column_Skip ) 1))) H + 2 ceil((Row_Size ) 1)) (2 (Row_Skip ) 1))) (eq. 2) Figure 15. Pixel Readout (no skipping) X incrementing Figure 16. Pixel Readout (Column Skip 2X) X incrementing |
Similar Part No. - MT9P031_17 |
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Similar Description - MT9P031_17 |
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