擷取PDF檔內圖片

使用軟體的話，有以下工具

http://opensecrets.pixnet.net/blog/post/27841494

http://azo-freeware.blogspot.com/2008/08/some-pdf-image-extract-14.html

使用linux/perl的話，參考下列連結

http://stackoverflow.com/questions/490629/how-can-i-extract-images-from-a-pdf-file

使用手寫程式的話，如果是jpg檔，以這個python script而言很簡單

http://nedbatchelder.com/blog/200712/extracting_jpgs_from_pdfs.html

否則就要參考一些資料了

http://stackoverflow.com/questions/2693820/extract-images-from-pdf-without-resampling-in-python

http://www.jpedal.org/PDFblog/2010/04/understanding-the-pdf-file-format-how-are-images-stored/

這也證實了，如果不是單純的jpg圖檔的話，"擷取PDF檔內圖片"這件工作可能會很麻煩

涉及中文的話，可參考以下連結

http://ccckmit.wikidot.com/pdf:streamcoding

原版的pdf規格

http://partners.adobe.com/public/developer/en/pdf/PDFReference16.pdf

簡明的pdf檔格式的說明：

http://www.mactech.com/articles/mactech/Vol.15/15.09/PDFIntro/

節錄其中重點如下

b  closepath, fill,and stroke path.
B  fill and stroke path.
b*  closepath, eofill,and stroke path.
B*  eofill and stroke path.
BI  begin image.
BMC  begin marked content.
BT  begin text object.
BX  begin section allowing undefined operators.
c  curveto.
cm  concat. Concatenates the matrix to the current transform.
cs  setcolorspace for fill.
CS  setcolorspace for stroke.
d  setdash.
Do  execute the named XObject.
DP  mark a place in the content stream, with a dictionary.
EI  end image.
EMC  end marked content.
ET  end text object.
EX  end section that allows undefined operators.
f  fill path.
f*  eofill Even/odd fill path.
g  setgray (fill).
G  setgray (stroke).
gs  set parameters in the extended graphics state.
h  closepath.
i setflat.
ID  begin image data.
j  setlinejoin.
J  setlinecap.
k  setcmykcolor (fill).
K  setcmykcolor (stroke).
l  lineto.
m  moveto.
M  setmiterlimit.
n  end path without fill or stroke.
q  save graphics state.
Q  restore graphics state.
re  rectangle.
rg  setrgbcolor (fill).
RG  setrgbcolor (stroke).
s  closepath and stroke path.
S  stroke path.
sc  setcolor (fill).
SC  setcolor (stroke).
sh  shfill (shaded fill).
Tc  set character spacing.
Td  move text current point.
TD  move text current point and set leading.
Tf  set font name and size.
Tj  show text.
TJ  show text, allowing individual character positioning.
TL  set leading.
Tm  set text matrix.
Tr  set text rendering mode.
Ts  set super/subscripting text rise.
Tw set word spacing.
Tz  set horizontal scaling.
T*  move to start of next line.
v  curveto.
w  setlinewidth.
W  clip.
y  curveto.

TABLE 1: PDF Page Markup Operators
(Note: Equivalent PostScript operators are in boldface.)

臉書隱私權設定

近況不想被"廣播"出去嗎?看一下這篇：

http://www.allfacebook.com/facebook-recent-activity-2010-01

perl將ascii轉成utf-8的方法

似乎每隔一陣子就會遇到，參考 http://perldoc.perl.org/utf8.html



    use utf8;
    no utf8;
    # Convert the internal representation of a Perl scalar to/from UTF-8.
    $num_octets = utf8::upgrade($string);
    $success    = utf8::downgrade($string[, FAIL_OK]);
    # Change each character of a Perl scalar to/from a series of
    # characters that represent the UTF-8 bytes of each original character.
    utf8::encode($string);  # "\x{100}"  becomes "\xc4\x80"
    utf8::decode($string);  # "\xc4\x80" becomes "\x{100}"
    $flag = utf8::is_utf8(STRING); # since Perl 5.8.1
    $flag = utf8::valid(STRING);

解剖學小測驗

這個網站放了一些解剖學的小測驗，感覺滿齊全的

http://msjensen.cehd.umn.edu/WEBANATOMY/

一開始是被這個網站帶進來的，它的建議就見仁見智囉

http://www.squidoo.com/how-to-study-anatomy

醫學名詞縮寫

比較美式的可以看這個，但文件本身不全

http://sagemb.com/info-resources/medical-billing-reference/medical-abbreviations

但是拉丁文太多了，可能還需要參考下面這些文件

194.8.8.217/library/lat/NTL/MED/slowar_s-x.txt_Piece40.61

http://dic.academic.ru/dic.nsf/enc_medicine/24855/%D0%9F%D1%80%D0%B8%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5

常用的列表如下


a. — arteria
aa. — arteriae
ant. — anterior
b. — bursa
Bac. — Bacillus
Bact. — Bacterium
bb. — bursae
dext. — dexter
ext. — externus
f. — fascia
ff. — fasciae
inf. — inferior
int. — internus
lat. — lateralis
lig. — ligamentum
ligg. — ligamenta
m. — musculus
med. — medialis
mm. — musculi
n. — nervus
nn. — nervi
post. — posterior
r. — ramus
rr. — rami
sin. — sinister
sup. — superior
v. — vena
vag. — vagina
vagg. — vaginae
vv. — venae

製作 USB 隨身碟開機方法

http://siryeh.com/module-news-display-sid-26.htm

這是正體中文的網站中，解說最正確的文章了，可惜圖片連結有問題

簡報術

星期天聽了一場很棒的演講，主講人把ppt檔用得淋灕盡至，完全沒有冷場，令我想到之前曾經想學習的 高橋流簡報法 。巧的是這本書的中譯本也在今年上市了，晚些會花點時間看看。當然江山各有才人出，網路上也有其它相關的介紹， Presentation Zen – 書不如blog 這篇評論我覺得相當犀利，一方面提到了 創意黏力學 ，同時也再次導引大家到簡報禪的聖堂 presentation zen 去一窺堂奧。