Jpeg质量

JPEG本來就是有損壓縮，一定會比BMP畫質有差。
要提升JPEG效果，可以在編碼處修改Q值參數。詳情可見RDK包內的Jpeg encoder usr guide

你好， 谢谢你的回复。
问下怎么修改Q？ 我查看了http://wenku.baidu.com/link?url=eFDqCirAcCkf5tJ8ILeezW0wbrt0H80Nd5u7S4L7LfmnQVLiLgltqegJ5osx-Sf9t76ebE5YGznJpptFnA8aCxdTbaZQV8fuNZo-0SdpjnW 还是没找到怎么修改啊。

########################################################################
# Encoder Control
########################################################################

FrameWidth = 176 # Frame width should be multiple of 16
FrameHeight = 144 # Frame height should be multiple of 16

QualityFactor = 20 # Quality Setting to be used.
# Ranges between 2 and 97.
# 2 => Lowest Quality. 97 => Best Quality.

CaptureWidth = 176 # Image width to compute image pitch.
# If Capture Width is > Image Width then
# use the former for image pitch.
generateHeader = 0 # Set 1 => Generate Header Only
debugTraceLevel = 0 # Specifies the debug trace level
lastNFramesToLog = 0 # Specifies the number of past frames
# to log debug trace. If debugTraceLevel is
# greater than 0, lastNFramesToLog must range
# between 0 and 10.
tilerEnable = 1 # 1 => Luma in TILER8, 0=> Luma in Raw.
chromaTilerMode = 0 # Valid only if tilerEnable = 1
# 1 => Chroma in TILER8, 0 => Chroma in
# TILER16