sepdek November 24, 2014

A newly developed remote monitoring app for Android devices has been published on the Google Play store. The application is a miniaturised version, which provides just a few remote measurements served by a data server. The application is heavily based upon the work of Maria Pappou and Christos Zaptses, which have originally developed an arduino-android […]

sepdek October 22, 2014

Since the Yosemite update a few days back, I decided to give Mac Mail another chance. One really annoying thing that I had to face right from the beginning was the lack of a keyboard shortcut for a “must” option to “Erase Deleted Items” “In All Accounts…” (quoting the menu options). There is an incredibly […]

sepdek October 14, 2014

I have recently finished developing a simple eHealth project that includes a health sensor kit and an iOS 8 app published through the App Store (*currently my developer account is suspended due to the capital controls in Greece). The project is called ‘i-Health’ for all the known reasons. The application offers a live medical monitoring […]

sepdek August 8, 2014

The only way that I found to delete multiple photos from the iPhone (iOS 7) without having to select them one-by-one or, at best, ‘Moment’-wise, was to use Preview on my mac! Preview has a magical option in the ‘File’ menu which is called ‘Import from iPhone…‘. This option opens a window showing all photos […]

sepdek May 15, 2014

It has been many years working on digitization, reconstruction and virtual world applications; tested and used various techniques covering almost all aspects in the digital recording workflow. In the recent past years our team has been successfully engaged in a very productive workflow regarding digitization and reconstruction in 3D. Specifically, this workflow involved the application […]

sepdek March 14, 2014

A straightforward approach to do geometric image transformations using MATLAB is to take advantage of the imtransform function available. First the image is supposed to be within a ‘unity’ rectangle and initial transformation conditions are defined accordingly: udata = [0 1]; vdata = [0 1]; fill_color = 128; org_rect = [0 0;1 0;1 1;0 1]; […]

sepdek March 14, 2014

I have already kept a note on the procedures needed to cancel a pre-approved or automated PayPal payment in a post regarding Skype but this is a more general problem and I need to remember… Walk through the menus as follows: My account > Profile > My Money > My preapproved payments > Update Here […]

sepdek February 16, 2014

Recently I read an interesting book “The Grand Design” by Stephen Hawking and Leonard Mlodinow. Somewhere at the end of the book there was a reference to the well known game of life by John Conway (1970). Although I knew it was implemented by various researchers and is already available in MATLAB with a demo […]

sepdek February 10, 2014

In a recently posted question @StackOverflow a user asked how to find the maximum Euclidean distance in a binary image produced by Canny edge detection using MATLAB. The original post is here. I report my response here just for archival purposes. Provided that you have a binary edge image, you need to think of white […]

sepdek December 30, 2013

Just a few days ago I run into a very interesting image processing challenge at StackOverflow. The challenge focused on the detection of a christmas tree in an image (see here for more info). Since I had a some free time I though I could give it a try… The rules in this challenge were […]

sepdek December 3, 2013

Quite often I have to read texts, papers and theses of students in order to review them and make corrections and suggestions. In many such cases I face the problem of texts with unequal word spacing and huge white-space areas that really looks bad. See the following image for an example (text taken from […]