Bookscanner - Revision history

0bit at 19:04, 10 March 2022

2022-03-10T19:04:46Z

← Older revision		Revision as of 19:04, 10 March 2022
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	[https://www.memoryoftheworld.org/es/blog/2012/10/28/our-beloved-bookscanner/ Spanish]		[https://www.memoryoftheworld.org/es/blog/2012/10/28/our-beloved-bookscanner/ Spanish]

			Info about HackTheBiblio Project on nuvol.calafou.org: [https://nuvol.calafou.org/index.php/apps/files/?dir=/HISTORIC_CALAFOU/2_eventos/2014-HackTheBiblio&fileid=762332]

			Internal Link to Manual of our first bookscanner: [https://nuvol.calafou.org/index.php/f/766556]

	== Principal sources ==		== Principal sources ==

Maxigas: Add note about "document cameras"

2019-08-06T23:21:56Z

Add note about "document cameras"

← Older revision		Revision as of 23:21, 6 August 2019
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	An option might seem to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, and there are full HD webcams (~2 Megapixels). The problem with all webcams, however, is that they have a fixed optical zoom, at quite a wide angle. To get those pixels covering the book page, you need to be very close to the book (~25cm). This forces you to use a design similar to what Reece Arnott uses, or the Ion Audio Booksaver. These designs make it impossible to avoid glare from light sources, no matter where the lights are placed. To avoid glare, you need a narrow zoom and a good distance (~90 cm) between book and camera.		An option might seem to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, and there are full HD webcams (~2 Megapixels). The problem with all webcams, however, is that they have a fixed optical zoom, at quite a wide angle. To get those pixels covering the book page, you need to be very close to the book (~25cm). This forces you to use a design similar to what Reece Arnott uses, or the Ion Audio Booksaver. These designs make it impossible to avoid glare from light sources, no matter where the lights are placed. To avoid glare, you need a narrow zoom and a good distance (~90 cm) between book and camera.

			6. Follow up: document cameras

			The digital cameras mentioned above proved unreliable on the long run, because it was difficult/impossible to make them focus on the page. It seems this is a problem with this particular model, reported by many users on forums. The solution was to invest more money and buy specialised "document cameras", such as this one: <https://www.ipevo.com/product/v4k/gallery>

	== Building process ==		== Building process ==

Brinerustle: /* Cameras */

2019-04-02T16:47:04Z

Cameras

← Older revision		Revision as of 16:47, 2 April 2019
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	It is very useful to be able to connect the cameras to a monitor during the calibration process. The cameras we bought use the same output for connecting to a remote control and to a monitor making it not practical at all using a monitor. Furthermore, connection with usb to a computer monitor was not an option, we had to look for RC connectors or adapters.		It is very useful to be able to connect the cameras to a monitor during the calibration process. The cameras we bought use the same output for connecting to a remote control and to a monitor making it not practical at all using a monitor. Furthermore, connection with usb to a computer monitor was not an option, we had to look for RC connectors or adapters.

	5. ~~Webcams~~		5. A note about webcams:

	~~Another~~ option ~~could be~~ to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, ~~but the~~ problem with webcams is they ~~almost always~~ have a ~~wide field of view over 90 degrees~~, ~~making such~~ a ~~solution impossible~~, ~~or requiring that the cameras would~~ be so close to the ~~page as~~ to ~~distort~~ the ~~lines on~~ the ~~page or interfere with the other~~ camera.		An option might seem to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, and there are full HD webcams (~2 Megapixels). The problem with all webcams, however, is that they have a fixed optical zoom, at quite a wide angle. To get those pixels covering the book page, you need to be very close to the book (~25cm). This forces you to use a design similar to what Reece Arnott uses, or the Ion Audio Booksaver. These designs make it impossible to avoid glare from light sources, no matter where the lights are placed. To avoid glare, you need a narrow zoom and a good distance (~90 cm) between book and camera.

	== Building process ==		== Building process ==

Brinerustle: /* Cameras */

2019-04-02T15:56:01Z

Cameras

← Older revision		Revision as of 15:56, 2 April 2019
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	2. CHDK firmware		2. CHDK firmware

	Middle category is CHDK firmware compatibles. CHDK is a third party open source firmware that allows the customisation of cameras. CHDK firmware is for Canon Powershot cameras, which are the cheaper compact digital camera product line. We ~~have~~ 200 euros in the budget for cameras, so we went with this option.		Middle category is CHDK firmware compatibles. CHDK is a third party open source firmware that allows the customisation of cameras. CHDK firmware is for Canon Powershot cameras, which are the cheaper compact digital camera product line. We had 200 euros in the budget for cameras, so we went with this option.

	3. Magic Lantern support		3. Magic Lantern support
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	5. Webcams		5. Webcams

	Another option could be to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, but the problem with webcams is they almost always have a wide field of view over 90 degrees, making such a solution impossible.		Another option could be to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, but the problem with webcams is they almost always have a wide field of view over 90 degrees, making such a solution impossible, or requiring that the cameras would be so close to the page as to distort the lines on the page or interfere with the other camera.

	== Building process ==		== Building process ==

Brinerustle: /* Cameras */

2019-04-02T15:47:43Z

Cameras

← Older revision		Revision as of 15:47, 2 April 2019
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	5. Webcams		5. Webcams

	Another option ~~would~~ be to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality.		Another option could be to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality, but the problem with webcams is they almost always have a wide field of view over 90 degrees, making such a solution impossible.

	== Building process ==		== Building process ==

Geotyr: /* Cameras */ webcam option

2019-01-25T16:55:11Z

Cameras: webcam option

← Older revision		Revision as of 16:55, 25 January 2019
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	It is very useful to be able to connect the cameras to a monitor during the calibration process. The cameras we bought use the same output for connecting to a remote control and to a monitor making it not practical at all using a monitor. Furthermore, connection with usb to a computer monitor was not an option, we had to look for RC connectors or adapters.		It is very useful to be able to connect the cameras to a monitor during the calibration process. The cameras we bought use the same output for connecting to a remote control and to a monitor making it not practical at all using a monitor. Furthermore, connection with usb to a computer monitor was not an option, we had to look for RC connectors or adapters.

			5. Webcams

			Another option would be to use two high resolution webcams directly connected to a laptop to trigger taking pictures and monitor their quality.

	== Building process ==		== Building process ==

Geotyr: /* Building process */ Placing pictures for column, platen and triggering - text still missing

2019-01-25T16:42:08Z

Building process: Placing pictures for column, platen and triggering - text still missing

@@ Line 195: / Line 195: @@
 The drilled the 2 triangles in order to introduce a threaded rod.
 The threaded rod is used to tighten the triangles against the square fixed on the base.
 === Column / Columna ===
-=== Platen / Platina ===
+[[File:05 COLUMN 070.JPG|500px|none|left]]
 === CHDK ===
 = Photos =

Geotyr: /* Cradle */ Documenation of the building process

2019-01-25T16:23:52Z

Cradle: Documenation of the building process

@@ Line 166: / Line 166: @@
 [[File:02 BASE 056.JPG|500px|none|left]]
 The last parts were fixing the other part of the sliders to the MDF sheet and attaching the different part of the base with screws
 === Column / Columna ===
 === Platen / Platina ===

Geotyr: /* Photos */ removing photos that were used for documentation

2019-01-25T15:41:26Z

Photos: removing photos that were used for documentation

← Older revision		Revision as of 15:41, 25 January 2019
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	= Photos =		= Photos =

	~~== Shopping ==~~

	~~<gallery>~~
	~~File:01_SHOPPING_001.JPG~~
	~~File:01_SHOPPING_002.JPG~~
	~~File:01_SHOPPING_003.JPG~~
	~~File:01_SHOPPING_004.JPG~~
	~~File:01_SHOPPING_005.JPG~~
	~~File:01_SHOPPING_006.JPG~~
	~~File:01_SHOPPING_007.JPG~~
	~~File:01_SHOPPING_008.JPG~~
	~~File:01_SHOPPING_009.JPG~~
	~~File:01_SHOPPING_010.JPG~~
	~~File:01_SHOPPING_011.JPG~~
	~~File:01_SHOPPING_012.JPG~~
	~~File:01_SHOPPING_013.JPG~~
	~~File:01_SHOPPING_014.JPG~~
	~~File:01_SHOPPING_015.JPG~~
	~~File:01_SHOPPING_016.JPG~~
	~~File:01_SHOPPING_017.JPG~~
	~~File:01_SHOPPING_018.JPG~~
	~~File:01_SHOPPING_019.JPG~~
	~~File:01_SHOPPING_020.JPG~~
	~~File:01_SHOPPING_021.JPG~~
	~~File:01_SHOPPING_022.JPG~~
	~~File:01_SHOPPING_023.JPG~~
	~~File:01_SHOPPING_024.JPG~~
	~~File:01_SHOPPING_025.JPG~~
	~~File:01_SHOPPING_026.JPG~~
	~~File:01_SHOPPING_027.JPG~~
	~~File:01_SHOPPING_028.JPG~~
	~~</gallery>~~

	~~== Base ==~~

	~~<gallery>~~
	~~File:02_BASE_029.JPG~~
	~~File:02_BASE_032.JPG~~
	~~File:02_BASE_033.JPG~~
	~~File:02_BASE_035.JPG~~
	~~File:02_BASE_040.JPG~~
	~~File:02_BASE_041.JPG~~
	~~File:02_BASE_042.JPG~~
	~~File:02_BASE_043.JPG~~
	~~File:02_BASE_044.JPG~~
	~~File:02_BASE_045.JPG~~
	~~File:02_BASE_048.JPG~~
	~~File:02_BASE_049.JPG~~
	~~File:02_BASE_050.JPG~~
	~~File:02_BASE_051.JPG~~
	~~File:02_BASE_056.JPG~~
	~~</gallery>~~

	~~== Cradle ==~~

	~~<gallery>~~
	~~File:03_CRADDLE_030.JPG~~
	~~File:03_CRADDLE_037.JPG~~
	~~File:03_CRADDLE_046.JPG~~
	~~File:03_CRADDLE_057.JPG~~
	~~File:03_CRADDLE_058.JPG~~
	~~File:03_CRADDLE_059.JPG~~
	~~File:03_CRADDLE_060.JPG~~
	~~File:03_CRADDLE_061.JPG~~
	~~File:03_CRADDLE_062.JPG~~
	~~File:03_CRADDLE_071.JPG~~
	~~</gallery>~~

	~~== Platen ==~~

	~~<gallery>~~
	~~File:04_PLATEN_038.JPG~~
	~~File:04_PLATEN_039.JPG~~
	~~File:04_PLATEN_047.JPG~~
	~~File:04_PLATEN_053.JPG~~
	~~File:04_PLATEN_054.JPG~~
	~~File:04_PLATEN_055.JPG~~
	~~File:04_PLATEN_063.JPG~~
	~~</gallery>~~

	~~== Column ==~~

	~~<gallery>~~
	~~File:05_COLUMN_065.JPG~~
	~~File:05_COLUMN_066.JPG~~
	~~File:05_COLUMN_067.JPG~~
	~~File:05_COLUMN_068.JPG~~
	~~File:05_COLUMN_070.JPG~~
	~~File:05_COLUMN_072.JPG~~
	~~File:05_COLUMN_073.JPG~~
	~~File:05_COLUMN_074.JPG~~
	~~File:05_COLUMN_075.JPG~~
	~~File:05_COLUMN_076.JPG~~
	~~File:05_COLUMN_077.JPG~~
	~~File:05_COLUMN_078.JPG~~
	~~File:05_COLUMN_079.JPG~~
	~~File:05_COLUMN_080.JPG~~
	~~File:05_COLUMN_083.JPG~~
	~~File:05_COLUMN_084.JPG~~
	~~</gallery>~~

	== Mounting ==		== Mounting ==

Jxxx at 15:30, 25 January 2019

2019-01-25T15:30:07Z

← Older revision		Revision as of 15:30, 25 January 2019
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	* We made an event called Hack the Biblio: Let's make Digital Public Libraries in 2014 as a collaboration with memoryoftheworld, when Voja Antonic donated a bookscanner to Calafou: https://calafou.org/en/content/hack-biblio-construir-bibliotecas-publicas https://calafou.org/en/content/voja-antonic-calafou		* We made an event called Hack the Biblio: Let's make Digital Public Libraries in 2014 as a collaboration with memoryoftheworld, when Voja Antonic donated a bookscanner to Calafou: https://calafou.org/en/content/hack-biblio-construir-bibliotecas-publicas https://calafou.org/en/content/voja-antonic-calafou
	* We scan out of print books published by Virus: http://www.viruseditorial.net/		* We scan out of print books published by Virus: http://www.viruseditorial.net/
	* ~~We built a book scanner (the~~ marron_scanner 😎) in 2018 during the Kunlabora event for supporting other collectives that want to scan: https://calafou.org/en/content/kunlabora-ephimeral-projects-kooperative		* <span style='width:32em;font-size:18px;font-weight:light;font-family:Courier,Sans;display:block;padding:4px;background:#DAA520;color:black;'>marron_scanner 😎 </span> was built in 2018 during the Kunlabora event for supporting other collectives that want to scan: https://calafou.org/en/content/kunlabora-ephimeral-projects-kooperative

	This page is documenting the design and construction of bookscanners. For the tutorial that explains "How to use the bookscanner", go to http://wiki.calafou.org/index.php/Bookscanning		This page is documenting the design and construction of bookscanners. For the tutorial that explains "How to use the bookscanner", go to http://wiki.calafou.org/index.php/Bookscanning