Bookscanner

The bookscanner currently resides in Appelscha for the digitisation of their archive.

Here is how to use it: DigitizingABook

docs

• https://chdk.fandom.com/wiki/CHDK_1.4.0_User_Manual
• http://gdlp01.c-wss.com/gds/6/0400000016/01/PSA590IS_CUG_EN.pdf

to fix

• replace lithium date time battery (p184 of manual)

settings that work

• ISO: 100
• Wite balance: thungsten
• My colors:
• Flash: off
• Metering Mode:
• Drive mode:
• compression:
• AF frame:
• af point-zoom:
• digital zoom: off
• mf-point zoom:
• safety mf
• af assist beam
• recording pixels (resolution): Large (8M) 3264x2448
• compression: superfine
• is-mode (image-stabilizer): continuous
• F 8.0

the wheel:

P: program AE auto: shutter speed + aperture manual: ISO, exposure compensation, white balance

Tv: shutter speed When you set shutter speed, camera automatically chooses aperture value left / right buttons to change the speed

Av: aperture mode When you set aperture, camera automatically chooses speed left / right buttons to change aperture

M: manually set shutter speed and aperture Manual shutter speed + aperture +/- button selects either shutter speed or aperture then use left/right to change

CHDK keys

Common To All Cameras in mode –

RIGHT – make selection, LEFT – Open context menu. Zoom-in / Zoom-out – Scroll-By-page in File Browser and File Reader modes. Half-shoot – Scroll one page forward in File Reader mode.

Look at: https://git.puscii.nl/lag/bookscanner for some scripts and other stuff

with a new chdk

Camera's can be controlled via the computer, there is software called spreads (on the bookscanner computer), that does this.

Otherwise you can also script around chdk (either cli tool, or there is a python library)

method without new firmware on camera

We have a bookscanner with cameras which are too old to be controlled by a computer. What we do is we make photos and then download them on the pc. There we process with a script, number the photos and then pass to scantailor and tesseract.

1. Making photos: a. empty the machines memory a1. set the machine on "shoot mode" b. take pictures of the book pressing the button c. connect the USB cable to the compurter and download the photos.

2. Download photos: a. set the machines on "player mode" b. use the scripts: getallfiles.sh to download all the images c. import images i

rudimentary bookscanner operation manual:

with cameras off turn the switch on camera mode(camera symbol)

turn on with power button

optional: set zoom-->push 'print' button to activate or disactivate the bookscenner script, adjust the focus and press 'print' again set same aperture value on both cameras

take pictures and check that both counter adds up

to upload photo switch to play mode

odd/even numbering script (it takes the folders with pictures (right & left) as input and rename the files with even and odd numbers-->the output folder "out" contains images in the right order)

SCRIPTZ ( usage ./rename.sh ODD_FOLDER EVEN_FOLDER )

!/bin/bash

# mkdir out

num=1 for file in $1/*.JPG; do cp "$file" "out/$(printf "%04u" $num).JPG" let num=num+2 done

num=0 for file in $2/*.JPG; do cp "$file" "out/$(printf "%04u" $num).JPG" let num=num+2 done

-----scantailor

open the folder out in scantailor and set the page (both for left and right, check a few pages)

save the project and the images

--------tesseract script for file in out/*.tif; do tesseract -l nld "$file" "$file" hocr convert $file $file.jpg

make sure you select the right language package!here nld (dutch)

done hocr-pdf out > finalfile.pdf

other wise create a pdf and use some other commercial option online or offline (abbyy finereader..)

(some) CAMERA SETTINGS

(some) scantailor settings

random.ScanTailor

adding metadata to the final pdf (coming soon: from catalog csv!)

exiftool -Title="Title" -Author="Name Author" -Subject="Some Subject" final.pdf