Text Images - Revision history

Andre: /* Pi cheat sheet */

2019-10-17T09:56:16Z

Pi cheat sheet

← Older revision		Revision as of 09:56, 17 October 2019
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	display image in Terminal 1 with		display image in Terminal 1 with
	fbi capture.jpg -T 1		fbi capture.jpg -T 1

	~~display video with oxmplayer~~
	~~oxmplayer http://oooooooooo.io/images/2/21/RF-enblanco-1.mp4~~


	picam; but Picam seems difficult to work with other software - should try webcam		picam; but Picam seems difficult to work with other software - should try webcam
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	There is a python module for it: https://pzwiki.wdka.nl/mediadesign/PiCam		There is a python module for it: https://pzwiki.wdka.nl/mediadesign/PiCam


	= references =		= references =

	<references/>		<references/>

Andre at 20:25, 4 February 2018

2018-02-04T20:25:24Z

← Older revision		Revision as of 20:25, 4 February 2018
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	'''Text Images'''		'''Text Images'''
	~~Documentation: [[Text Images/documentation]]~~

	Pad: https://stuff2233.club/padlife/p/text-images		Pad: https://stuff2233.club/padlife/p/text-images

			[[File:shell-animations.mp4\|600px\|shell animations]]

	{{:Text_Images/documentation}}		{{:Text_Images/documentation}}

Andre at 19:18, 4 February 2018

2018-02-04T19:18:53Z

← Older revision		Revision as of 19:18, 4 February 2018
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	Pad: https://stuff2233.club/padlife/p/text-images		Pad: https://stuff2233.club/padlife/p/text-images

			{{:Text_Images/documentation}}

	===Announcement text===		===Announcement text===

Andre at 19:21, 3 February 2018

2018-02-03T19:21:16Z

← Older revision		Revision as of 19:21, 3 February 2018
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	'''Text Images'''		'''Text Images'''
			Documentation: [[Text Images/documentation]]
	~~Group~~: ~~WDK17-MHP-El2~~

	~~Dates: 22Jan-2Feb. Tuesday - Friday. 13:00-16:00.~~

	~~Room: BL -1.3 (BL 0.3 on Wed)~~

	Pad: https://stuff2233.club/padlife/p/text-images		Pad: https://stuff2233.club/padlife/p/text-images
	~~==Description==~~

	The following elective will be based on the project [http://luciadossin.net/excelfie.html Excelfie] by design Lucia Dossin, where selfie (images), captured by a digital camera are converted onto plain-text files (ASCII-art). In these text-based images, the sequence of pixels of the captured images is mapped onto corresponding text characters, in order to create text-based rendition of the original bit map image.

	~~[[File:3excelfie-derivation1.png\|400px\|right]]~~

	~~[[File:excelfie-2017-11-12-18.28.12.jpg\|Excelfie at Zinecamp 2017\|400px\|right]]~~

	===Announcement text===		===Announcement text===
	What are digital (bit-map) images? In their simpler form nothing more but sequence of pixels, each with its color value, organized into lines and rows. Such form of representing image information is uncannily similar to how text is represented digitally: a line-by-line sequence of characters, each with its corresponding value (code point). Can this similarity be used to transform pixel-based images into similar looking images made solely by text~~? And what happens when we reverse the process and try to get the text-based images into pixels using Optical Character Recognition software~~?		What are digital (bit-map) images? In their simpler form nothing more but sequence of pixels, each with its color value, organized into lines and rows. Such form of representing image information is uncannily similar to how text is represented digitally: a line-by-line sequence of characters, each with its corresponding value (code point). Can this similarity be used to transform pixel-based images into similar looking images made solely by text?


	==Material ==		==Material ==
	~~We will work towards the implementation of the Excelfie in the Publication Station, for which we'll use:~~
	* raspberry Pi		* raspberry Pi
	* camera (webcam)		* camera (webcam)
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	* speakers (from action)		* speakers (from action)
	* typewriter		* typewriter

	~~Pad: https://stuff2233.club/padlife/p/text-images~~

	===Raspberry Pi software===		===Raspberry Pi software===
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	* imaging: imagemagick fbi		* imaging: imagemagick fbi
	* audio: espeak		* audio: espeak
	* editor: ~~nano~~		* editor: ne (nice editor)
	*

	=Sessions=		=Sessions=
	==Day 1 - Tue 23Jan==		==Day 1 - Tue 23Jan==
	~~Pad: https://stuff2233.club/padlife/p/text-images~~

	===Excelfie===		===Excelfie===
	http://luciadossin.net/excelfie.html		http://luciadossin.net/excelfie.html

	What is ~~happeningin~~ this work?		What is happening in this work?

	~~http~~:~~//luciadossin~~.~~net/_/img/excelfie/~~excelfie-~~derivation1~~-~~zinecamp~~-~~day2~~-~~3-silvio-lorusso~~.jpg		[[File:3excelfie-derivation1.png\|400px\|right]]

			[[File:excelfie-2017-11-12-18.28.12.jpg\|Excelfie at Zinecamp 2017\|400px\|right]]

	===Typewriter Art===		===Typewriter Art===

Andre: /* bitmap images */

2018-01-28T20:57:37Z

bitmap images

← Older revision		Revision as of 20:57, 28 January 2018
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	== bitmap images ==		== bitmap images ==
			You probably have heard before that bitmap images are grids of pixels, where
			* resolution: the number of horizontal and vertical pixels. E.g. 1920x1080 is 1920 pixels wide and 1080 high
			* color depth: the number of bits used to indicate the color of a single pixel

	~~jp2a - jpg~~ to ~~ascii converter~~.		for a good introduction to bit maps see: See Bourke, Paul. n.d. ‘A Beginners Guide to Bitmaps’. Accessed 2 January 2018. http://paulbourke.net/dataformats/bitmaps/.
	~~Each pixel is a character, in a matrix like a bitmap - also a matrix~~

	~~Resolution~~

	~~Color depth - use microscope~~		===Resolutions: ===

	~~Txt based~~ image		Color depth - (use microscope)
	* ~~hi res problem~~		* [[Binary image\|1-bit color]] (2<sup>1</sup> = 2 colors): '''monochrome''', often black and white, compact [[Macintosh]]es, [[Atari ST]].
	** ~~im convert~~		* 2-bit color (2<sup>2</sup> = 4 colors): [[Color Graphics Adapter\|CGA]], gray-scale early [[NeXTstation]], color Macintoshes, Atari ST.
			* 3-bit color (2<sup>3</sup> = 8 colors): many early home computers with TV displays, including the [[ZX Spectrum]] and [[BBC Micro]]
			* 4-bit color (2<sup>4</sup> = 16 colors): as used by [[Enhanced Graphics Adapter\|EGA]] and by the least common denominator VGA standard at higher resolution, color Macintoshes, Atari ST, [[Commodore 64]], [[Amstrad CPC]].
			* 5-bit color (2<sup>5</sup> = 32 colors): [[Original Amiga chipset]]
			* 6-bit color (2<sup>6</sup> = 64 colors): Original Amiga chipset
			* [[8-bit color]] (2<sup>8</sup> = 256 colors): most early color Unix workstations, [[VGA]] at low resolution, [[Super VGA]], color Macintoshes, [[Atari TT]], [[Advanced Graphics Architecture\|Amiga AGA chipset]], [[Falcon030]], [[Acorn Archimedes]].
			* 12-bit color (2<sup>12</sup> = 4096 colors): some [[Silicon Graphics]] systems, Color NeXTstation systems, and [[Amiga]] systems in [[Hold And Modify\|HAM]] mode.
			* '''8-bit color''': A very limited but true direct color system, there are 3 bits (8 possible levels) for each of the R and G components, and the two remaining bits in the byte pixel to the B component (four levels), enabling 256 (8 × 8 × 4) different colors.
			* Grey scale (8-bit)
			* True color (24-bit): Usually, true color is defined to mean 256 shades of red, green, and blue, for a total of 224, or alternately 2563, or 16,777,216 color variations. The human eye can discriminate up to ten million colors
			<ref>https://en.wikipedia.org/wiki/Color_depth</ref>

	* color to character distribution:
	** related to darkness?		{{youtube\|06OHflWNCOE}}
	** im depth


	You probably have heard before that bitmap images are grids of pixels<ref>Bourke, Paul. n.d. ‘A Beginners Guide to Bitmaps’. Accessed 2 January 2018. http://paulbourke.net/dataformats/bitmaps/.</ref>
	~~, where~~
	* resolution: is the number of horizontal and vertical pixels. E.g. 1920x1080 is 1920 pixels wide and 1080 high
	* color depth: the number of bits used to indicate the color of a single pixel

	~~{{youtube\|06OHflWNCOE}}~~

	~~'''~~converting resolution~~'''~~		===converting resolution===
			with Imagemagick

	to 100px wide		to 100px wide
	convert myimage.jpg -resize 100x output.jpg		convert myimage.jpg -resize 100x output.jpg

	to 100px ~~long~~		to 100px hight
	convert myimage.jpg -resize ~~100x~~ output.jpg		convert myimage.jpg -resize x100 output.jpg

	to 100x100px (image will loose its proportion; hence the "!" so imagemagick is sure that you wanna do that:)		to 100x100px (image will loose its proportion; hence the "!" so imagemagick is sure that you wanna do that:)
	convert myimage.jpg -resize 100x100! output.jpg		convert myimage.jpg -resize 100x100! output.jpg

	~~'''~~converting color (bit depth)~~'''~~		===converting color (bit depth)===

	convert an image into monochrome (1 bit depth) image: 2color values (b/w)		convert an image into monochrome (1 bit depth) image: 2color values (b/w)
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	convert myimage.jpg out.xpm		convert myimage.jpg out.xpm


	~~What can be done with this?~~
	* draw by writing?
	* color separation?
	* ASCII art - by search and replacing characters

Andre at 14:44, 26 January 2018

2018-01-26T14:44:43Z

← Older revision		Revision as of 14:44, 26 January 2018
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	Room: BL -1.3 (BL 0.3 on Wed)		Room: BL -1.3 (BL 0.3 on Wed)

			Pad: https://stuff2233.club/padlife/p/text-images
	==Description==		==Description==

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	* typewriter		* typewriter

	Pad: https://~~pad~~.~~pzimediadesign.nl~~/p/~~Excelfie~~		Pad: https://stuff2233.club/padlife/p/text-images

	===Raspberry Pi software===		===Raspberry Pi software===
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	=Sessions=		=Sessions=
	==Day 1 - Tue 23Jan==		==Day 1 - Tue 23Jan==
	Pad: https://~~pad~~.~~pzimediadesign.nl~~/p/~~Excelfie~~		Pad: https://stuff2233.club/padlife/p/text-images

	===Excelfie===		===Excelfie===

Andre: /* Day 3 - Wed 25Jan: Bitmap */

2018-01-26T11:22:27Z

Day 3 - Wed 25Jan: Bitmap

@@ Line 250: / Line 250: @@
 * imagemagick: a command-line program for image manipulation. We will be using it mainly through the command <code>convert</code> which convert 1 image onto another.
 * fbi (frame-buffer image):  displays  the specified file(s) on the linux console using the framebuffer device
@@ Line 286: / Line 306: @@
 (8 bit depth) image: 256 color values
   convert myimage.jpg -colorspace gray -depth 4 out.png
@@ Line 394: / Line 413: @@
 {{Youtube|UBX2QQHlQ_I}}
 ==Day 3- Thursday ==

Andre: /* Day 3- Thursday */

2018-01-25T15:41:07Z

Day 3- Thursday

← Older revision		Revision as of 15:41, 25 January 2018
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	=== ne: nice editor===		=== ne: nice editor===

	F1 - menu		F1 - menu

			==Day 4 Friday==
			* FTP
			* Dot matrix
			* sound

	==Sound==		==Sound==

Andre: /* Day 3- Thursday */

2018-01-25T11:02:14Z

Day 3- Thursday

@@ Line 398: / Line 398: @@
 ==Day 3- Thursday ==
 ===Dot Matrix printers:  escpos===
 Using python [https://python-escpos.readthedocs.io/en/latest/api/escpos.html escpos ]

Andre at 10:46, 25 January 2018

2018-01-25T10:46:11Z

← Older revision		Revision as of 10:46, 25 January 2018
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	{{Youtube\|UBX2QQHlQ_I}}		{{Youtube\|UBX2QQHlQ_I}}



			==Day 3- Thursday ==
			===Dot Matrix printers: escpos===
			Using python [https://python-escpos.readthedocs.io/en/latest/api/escpos.html escpos ]

			with Kube



			With the Fujitsu DL6600:

			<source lang="python">
			In [11]: f=Serial(devfile=u'/dev/ttyUSB0', baudrate=9600, bytesize=8, timeout=1, parity='N', stopbits=1, xonxoff=False, dsrdtr=True)
			Serial printer enabled

			In [12]: f.text('test')

			In [13]: f.close()
			</source>

	==Day 4 - Friday 26Jan: Bitmap outside the screen ==		==Day 4 - Friday 26Jan: Bitmap outside the screen ==