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Convert images with ImageMagick

Sunday, 04 October 2009 22:10 | Author: Andreas |

ImageMagick provides a lot of useful tools for image processing. Today I want to introduce convert which is part of the ImageMagick bundle. Often I get images in a format I cannot process or which takes a huge amount of space on my hard disk. Using convert it's quite easy to store them e.g. in PNG. Imagine a set of TIF images that should be converted to PNG. The script below will do this task within seconds and without any further human interaction.

#/bin/bash
# tif2png

#set debug

find . -type f | /bin/grep .tif$ |while read file
do
 filenoext=${file%%.tif}
 filenameout=$filenoext.png #change filetype here
 echo "Processing $file -> $filenameout"
 convert  "$file" "$filenameout"
done

Substitute tif in line 8 with any other image input-format and png in line 9 with your desired output format.

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Last Updated (Wednesday, 07 October 2009 21:16)

Asus 1000h netbook - sound problems under ubuntu eee (easy peasy) linux

Friday, 02 October 2009 18:22 | Author: Andreas |

I bought a Asus 1000h netbook 2nd hand from a student and installed immediately linux on it. I chose Easy Peasy (version 1.1) which is an ubuntu based distribution. After some days of use I can say that most things just work out of the box as you would expect from a distribution for netbooks. One annoying issue I encountered several times is that the sound stops working. First it seemed quite randomly but then I found out that if Skype is running no other application can use the sound card. I tried listening to my favorite internet radio station lounge.fm, watching streams from the local TV broadcasters webpage (ORF) or just recording my voice with the preinstalled voice recorder. Maybe an update will solve this problem ... I'll keep you updated!

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Last Updated (Friday, 02 October 2009 18:23)

Eee PC and drei.at as internet provider

Friday, 02 October 2009 18:20 | Author: Andreas |

I own an Asus 1000h and unfortunately this laptop doesn't have an integrated umts modem. Therefore I use my pretty old Motorola Razr V3 via bluetooth for surfing. wvdial was the tool of my choice and with the configuration below it works quite fine:

andreas@andeee:~$ cat /etc/wvdial.conf

#wvdial für Motorola V3xx @ USB mit Drei.at
[Dialer Defaults]
Init1 = ATZ
Init2 = ATS0=0
Init3 = AT+CGATT=0
Init4 = AT+CGQREQ=1,0,0,0,0,0
Init5 = AT+CGQMIN=1,0,0,0,0,0
Init6 = AT+CGDCONT=1,"IP","drei.at","0.0.0.0",0,0
Init7 = ATE1V1&D2
Init8 = AT+IFC=2,2
Stupid Mode = 1
SetVolume = 0

ISDN = 0
Phone = *99#

Username = drei
Password = drei

Modem Type = USB Modem
#PLEASE SELECT YOUR DEVICE HERE -> rfcomm0 is for bluetooth
Modem = /dev/rfcomm0
Baud = 460800
FlowControl = NOFLOW
Dial Command = ATDT

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Last Updated (Sunday, 04 October 2009 10:49)