I tried to install opencv on my raspberry pi (OS:Debian wheezy) following the site http://eduardofv.com/read_post/185-Installing-OpenCV-on-the-Raspberry-Pi
But when I entered the command it shows errors.
pi@raspberrypi ~ $ sudo apt-get install libpnglite-dev libpngwriter0-dev libpngwriter0c2 Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libpngwriter0-dev E: Unable to locate package libpngwriter0c2
Could you help me?