Specifications

56
2.2.7 Concurrent Use with Other Device
Table 2.67 shows the concurrent use of decoder, streaming, capturing image of the CMOS Imager
with other devices listed in the below table.
Table 2.39
Other Devices Concurrent Use
Camera Impossible.
USB There may be a possibility, but it is not recommended to use the device concurrently.
Bluetooth Possible.
WLAN Possible.
2.2.8 Process of Image
Decoding and Encoding BITMAP/JPEG
The process of image performs encoding image data in BITMAP into JPEG file, and decoding
image data in JPEG file into BITMAP.
Table 2.40
Process Description Remark
Covert image data in RGB888 (24-bit color) into
JPEG file.
Encoding
Convert image data in YUV422 into JPEG file.
Convert image data in JPEG into RGB888 (24-bit
color).
Decoding
Convert image data in JPEG file into YUV422.
0 High compress rate, low image quality Setting image quality
and compress rate
(when encoding)
100 Low compress rate, high image quality
in the range of 0 to
100.
The functions of the JPEG Library relevant to the “Decoding and Encoding BITMAP/JPEG” are
as follows.
JPGEncodeToFile
: Encodes RGB data or YUV data to output the result as a JPEG file.
JPGDecodeFromFile
: Decodes a JPEG file to output the result as BMP data.
Embedding Thumbnail into Image File
When saving an image file, the thumbnail can be embedded in the image file (applicable to only
JPEG). Instead of displaying the whole image on the display screen, the thumbnail can be
deployed on the screen to save time to load and decode the file.
The function of the JPEG Library relevant to the “Embedding Thumbnail into Image File” is as
follows.
JPGEncodeToFileEx
: Encodes RGB data or YUV data to output the result as a JPEG file. It
adds specified GPS positioning information and specifies “with
thumbnail” or “without thumbnail”.