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STV0974TR bảng dữ liệu(PDF) 11 Page - STMicroelectronics |
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STV0974TR bảng dữ liệu(HTML) 11 Page - STMicroelectronics |
11 / 69 page Functional description STV0974 11/61 Color matrix Each pixel (RGB vector) is multiplied by a color matrix to adjust color balance. Viewfinder and live settings are independent to allow for optimization of both LCD display and capture for later viewing (i.e. on a PC). Sharpness enhancement A sharpening two-dimensional mask is applied to Green only and from interpolation. The resulting data is added (with a gain factor) to the matrix RGB data. Downscaler The downscaler unit extracts a rectangular region of interest and resizes the image by resampling video data. Standard image size such as CIF, QVGA and QCIF are available as well as a fully programmable custom size: When custom size is selected, the crop and scale parameters are subject to the following constraints to ensure proper operation: ● Output image size must be in 8 x 8 pixels increments ● Scaling factor can be any value giving an input image size within input limits Gamma correction A non-linear gain is applied to each pixel’s RGB components to compensate for the display’s non-linearity. A standard curve is available for image capture for later viewing on a PC and an S-curve is available for LCD display. Coder The coder unit converts the internal RGB video stream to a user selectable output video format. It is based on a YUV digital video encoder with embedded synchronization codes, compliant with [1], extended with the support of RGB formats for viewfinder usage, as shown in Table 4. Table 3: Standard image size, VGA input Format Image size Cropping Scaling Comments VGA 640 x 480 None None CIF 352 x 288 528 x 432 / 1.5 82.5% of input image used, centered QVGA 320 x 240 None / 2 QCIF 176 x 144 528 x 432 / 3 82.5% of input image used, centered QQVGA 160 x 120 None / 4 SubQCIF 128 x 96 None / 5 QQCIF 88 x 72 528 x 432 / 6 82.5% of input image used, centered Custom max VGA Any Any See below |
Số phần tương tự - STV0974TR |
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Mô tả tương tự - STV0974TR |
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