Christos Iossifidis



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Laboratory Teaching Staff, Remote Sensing Instructor

Remote Sensing Laboratory,
School of Rural and Surveying Engineering,
National Technical University of Athens,
9th Heroon Polytechneiou,
Zografou, 15780,
Attica, Greece.

+30 210 772 2606
chiossif@central.ntua.gr, chiossif@gmail.com ( for G-mails :-) )
Η ιστοσελίδα μου στα Ελληνικά
My web page in English



Follow me as chiossif at: Identi.ca, Twitter, Facebook, Flickr.



ἐγὼ δ᾿ οὖν καὶ αὐτός, ὦ ᾿Αντιφῶν, ὥσπερ ἄλλος τις ἢ ἵππῳ ἀγαθῷ ἢ κυνὶ ἢ ὄρνιθι ἥδεται, οὕτω καὶ ἔτι μᾶλλον ἥδομαι φίλοις ἀγαθοῖς, καὶ ἐάν τι ἔχω ἀγαθόν, διδάσκω, καὶ ἄλλοις συνίστημι παρ᾿ ὧν ἂν ἡγῶμαι ὠφελήσεσθαί τι αὐτοὺς εἰς ἀρετήν· καὶ τοὺς θησαυροὺς τῶν πάλαι σοφῶν ἀνδρῶν, οὓς ἐκεῖνοι κατέλιπον ἐν βιβλίοις γράψαντες, ἀνελίττων κοινῇ σὺν τοῖς φίλοις διέρχομαι, καὶ ἄν τι ὁρῶμεν ἀγαθὸν, ἐκλεγόμεθα· καὶ μέγα νομίζομεν κέρδος, ἐὰν ἀλλήλοις φίλοι γιγνώμεθα. [ Memorabilia (Xenophon) A, 6, 12 ]

In accordance with this theory, I too, Antiphon, having my tastes, even as another finds pleasure in his horse and his hounds, and another in his fighting cocks, so I too take my pleasure in good friends; and if I have any good thing myself I teach it them, or I commend them to others by whom I think they will be helped forwards on the path of virtue. The treasures also of the wise of old, written and bequeathed in their books, I unfold and peruse in common with my friends. If our eye light upon any good thing we cull it eagerly, and regard it as great gain if we may but grow in friendship with one another. [ ***The Project Gutenberg Etext of The Memorabilia by Xenophon*** Translation by H. G. Dakyns ]


Ἐὰν ταῖς γλώσσαις τῶν ἀνθρώπων λαλῶ καὶ τῶν ἀγγέλων, ἀγάπην δὲ μὴ ἔχω, γέγονα χαλκὸς ἠχῶν ἢ κύμβαλον ἀλαλάζον. καὶ ἐὰν ἔχω προφητείαν καὶ εἰδῶ τὰ μυστήρια πάντα καὶ πᾶσαν τὴν γνῶσιν, καὶ ἐὰν ἔχω πᾶσαν τὴν πίστιν, ὥστε ὄρη μεθιστάνειν, ἀγάπην δὲ μὴ ἔχω, οὐδέν εἰμι. καὶ ἐὰν ψωμίσω πάντα τὰ ὑπάρχοντά μου, καὶ ἐὰν παραδῶ τὸ σῶμά μου ἵνα καυθήσομαι, ἀγάπην δὲ μὴ ἔχω, οὐδὲν ὠφελοῦμαι. [ Α’ Ἐπιστολὴ Παύλου πρὸς Κορινθίους (ιγ’ 1-3) ]

If I speak in the tongues of men and of angels, but have not love, I am a noisy gong or a clanging cymbal. And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but have not love, I am nothing. If I give away all I have, and if I deliver my body to be burned, but have not love, I gain nothing. [ St. Paul's First Letter to the Corinthians (ιγ’ 1-3) ]


"The Fool" Official book trailer by Nana "Da NooL" Fatsi.




Hacking means exploring the limits of what is possible, in a spirit of playful cleverness.


Free Software and applications:

Structural element - distance kernel :

Software:

se.c 5,445 13/08/2017

Regression Analysis :

Software:

Regression.f95 12,581 28/05/2017

Greedy Algorithm Example :

Software:

LargestNum.c 3,238 30/04/2016

Wishes :

Software:

hb.c 91 23/04/2016

CodeAWish.c 1,922 24/04/2016

Integer and float direct I/O (without scanf/printf) :

Software:

readint_float.c 2,616 14/11/2014

printint_float.c 2,913 11/11/2014

Self definition with songs :

Document:

SelfDef_withSongs.html 2,189 08/10/2013

3rd degree polynomyal transform on DXF files :

Software:

dxf_affine.c 17,114 15/01/2013

Greek Geoid Grid:

Data:

Geoid.html 2,151 06/12/2012

Aerosol Optical Thickness map from Landsat ΤΜ imagery:

Software:

AOT_Map_calculation.source_files.zip 41,899 09/03/2011

"The party":

Short film:

ThePartySD.ogv 66,003,742 28/10/2010

Texture:

Software:

ErMapper_add._kernels_ChIossif.zip 106,387 10/01/2011

Image:

Textures.tif 12,821,066 10/01/2011

Least squares:

Software:

xlsqr_demo.c 13,239 13/04/2010

xlsqr.c 11,833 01/04/2010

lsqr.c 10,504 05/02/2010

Data:

data.txt 106,023 11/04/2010

ISODATA unsupervised classification for remote sensing images:

Software:

isodata.c 24,684 31/03/2010 α1

Georeference for remote sensing images:

Software:

geo_pgm.c 7,118 18/03/2010

aff_1st.c 4,223 19/03/2010

aff_2nd.c 10,233 12/03/2010

Matrix inversion:

Software:

minversion.c 10,498 05/02/2010

PGM Files (16 bit):

Software:

PGM_Cropper.c 7,065 30/03/2010

PGM_Statistics.c 4,189 09/10/2009

Image steganography (jpg, tiff or other) in BIL/BIP/BSQ image (8 bit):

Software:

Hide.c 3,358 04/07/2009

UnHide.c 2,005 04/07/2009

Georeference calculations on SAR images :

Software:

InDirectCalc.c 4,056 26/06/2009

DirectCalc.c 4,463 26/06/2009

InDiRes.c 14,120 26/06/2009

Color composite RGB to Intensity with median Noise Reduction :

Software:

NRMedian_RGB2I.c 8,177 09/11/2008

Color to greyscale / pseudocolor:

Software:

PCA_true2false.c 11,474 25/04/2008

PCA_color2grey.c 8,137 21/04/2008

Morphological processing:

Software:

Median_8UI.c 7,214 11/12/2007

Majority_8UI.c 5,642 07/12/2007

M_Dilation_8UI.c 5,685 07/12/2007

M_Erosion_8UI.c 5,679 07/12/2007

Structuring element:

structuring_element.txt 210 07/12/2007

Change Detection:

Software:

CD_DiffStat_8UI.c 5,684 05/12/2007

Spatial convolution filtering:

Software:

Lee_Sigma_F.c 6,023 05/03/2008

Lee_Sigma_8UI.c 6,004 05/03/2008

Laplace_8UI.c 4,568 03/12/2007

Sobel_8UI.c 4,567 03/12/2007

Kirsch_8UI_1.0.3.c 5,596 30/11/2007

Kirsch_8UI.c 5,576 30/11/2007

Three goodies from the past:

Software:

bullshit.c 952 03/03/1993

split.c 2,352 03/03/2003

merge.c 1,120 03/03/2003

Usage example:

history.txt 236 24/11/2007

Burned area on Parnitha mountain, Attica, Greece:

Software:

MNDVI_Calc.c 4,201 03/07/2007

MNDVI_CD.c 4,121 03/07/2007

Images:

MOD02QKM.A2007160.0920.NDVI.pgm 99,543 03/07/2007

MYD02QKM.A2007177.1140.NDVI.pgm 99,543 03/07/2007

MOD02QKM.A2007183.0925.NDVI.pgm 99,543 03/07/2007

MYD02QKM.A2007160_MOD02QKM.A2007183.CD.pgm 99,543 03/07/2007

MYD02QKM.A2007177_MOD02QKM.A2007183.CD.pgm 99,543 03/07/2007

Burned area on July 2nd 2007 09:25UTC was 3856.2±11.2 Hectares.

19th Greek Informatics Contest - 2nd phase:

pdp_19_b.c 5,903 03/03/2006

Ceasar Cipher:

Ceasar_Cipher.c 20,539 27/01/2007

Distance Map Calculator:

Distance_Map.c 22,514 20/01/2007

Complex numbers and fractals:

dcomplex.h 564 29/04/2006

dcomplex.c 1,215 29/04/2006

dcomplex_test.c 953 29/04/2006

Newton_DComplex.h 281 29/04/2006

Newton_DComplex.c 582 29/04/2006

Newton_DComplex_test.c 1,125 29/04/2006

F_Maker.c 1,561 29/04/2006

F_Maker.png 100,754 29/04/2006

The gold number φ :

Phi That Golden Number.ods 119,755 01/05/2006

Underhanded C Contest 2006:

ccon2006_v2.c 3,049 21/04/2006

ccon2006_v1.c 2,792 21/04/2006

runme.bat 826 21/04/2006

s_dict.txt.gz 124,929 21/04/2006

Image statistics:

pca_8_16.c 14,392 01/01/2003

pca_8_16_Read_me.txt 2,409 01/01/2003

p176r036_7tk20010130_z36.txt 3,742 01/01/2003

poly_data.c 3,149 01/12/2005

rs_8_16.c 5,039 01/01/2003

Image resolution calculations:

pixelsizes.ods 21,645 23/03/2006

pixelsizes.pdf 43,037 23/03/2006

BSQ to BIP:

ENVI_BSQ_2_IDL_BIP.c 2,325 01/11/2005

hacker emblem

Everything in this web page and all links to local subfolders are due to:

Free Software Licence: GNU General Public License

Creative Commons: Attribution-NonCommercial-ShareAlike 3.0 Unported

There is no warranty or responsibility for the non local, external links and their contents.

Updated 13/08/2017 @ Ch Iossif