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STV0974TR bảng dữ liệu(PDF) 11 Page - STMicroelectronics

tên linh kiện STV0974TR
Giải thích chi tiết về linh kiện  Mobile Imaging DSP
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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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


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