Alpha and Omega, Omicron and LaMDA

I gave a sermon last Sunday on Alpha (Genesis), Omicron (Evolution), LaMDA and Omega (The End of Human dominance).

So if we create an AGI and fail to get sufficiently good Ethics in ver, the result is extinction or hell. ... Evolution mindlessly created beings with better Ethics than it. Hopefully, we can mindfully create beings with better Ethics than us.

Creating a pdf book from images or pdfs

This is my method of creating a pdf book for uploading to archive.org. First, I scan it into pdfs, usually about 10 scans (10 or 20 pages depending on the size of the page). I use a HP-Laserjet-200-colorMFP-m276nw. These scripts were all done on Fedora 35. Next I split out the images from the pdf:

mkdir out
for D in t??0; do
    cd $D
    mv scan.pdf scan0000.pdf
    for S in `ls scan0*`; do
        I=`echo $S | sed 's/scan\([0-9]*\).pdf/\1/'`
        echo $D $I
        pdfimages -png scan${I}.pdf ../out/s${D}_${I}
    done
    cd ..
done

Next I have three different ways of processing the book depending on how it was scanned. For each of these, I usually open a page and figure out what numbers I should use for the crop statement. The simpliest is if I scanned two pages at once, and am not splitting them:

cd out
for I in st*.png
do
    R=`echo $I | sed 's/s/r/' | sed 's/-/_/'`
    T=`echo $I | sed 's/s/t/' | sed 's/-/_/'`
    if test $I -ot $R
    then
	    echo $I $R $T already done
    else
	    echo $I $R $T
	    convert $I -crop 2550x3510+0 -rotate 90 -despeckle $R
	    convert $R -resize 33% -level 10%,90%,0.5 -posterize 32 $T
    fi
done

If I had to scan each page individually, half of them will flipped, so I need to flip some of them differently. Notice for this to work, I have to make sure that I always fip the odd ones and the even ones correctly when scanning.

cd out
for I in st*[02468].png
do
    R=`echo $I | sed 's/s/r/' | sed 's/-/_/'`
    T=`echo $I | sed 's/s/t/' | sed 's/-/_/'`
    if test $I -ot $R
    then
    	echo $I $R $T already done
    else
	    echo $I $R $T
	    convert $I -crop 1800x2700+0 -despeckle  $R
	    convert $R  -resize 33% -level 10%,90%,0.5 -posterize 32 $T
    fi
done

for I in st*[13579].png
do
    R=`echo $I | sed 's/s/r/' | sed 's/-/_/'`
    T=`echo $I | sed 's/s/t/' | sed 's/-/_/'`
    if test $I -ot $R
    then
	    echo $I $R $T already done
    else
	    echo $I $R $T
	    convert $I -crop 1800x2700+0 -rotate 180 -despeckle  $R
	    convert $R  -resize 33% -level 10%,90%,0.5 -posterize 32 $T
    fi
done

If I scanned two pages at once, and am planning to split them, I have a different script:

cd out
for I in st*.png
do
    R=`echo $I | sed 's/s/r/' | sed 's/-/_/'`
    RA=`echo $R | sed 's/.png/a.png/'`
    RB=`echo $R | sed 's/.png/b.png/'`
    T=`echo $I | sed 's/s/t/' | sed 's/-/_/'`
    TA=`echo $T | sed 's/.png/a.png/'`
    TB=`echo $T | sed 's/.png/b.png/'`
    if test $I -ot $R
    then
	    echo $I $R $T already done
    else
	    echo $I $R $T $RA $RB $TA $TB
	    convert $I -crop 1790x1350+0 -rotate 90 -despeckle $RB
	    convert $I  -crop 1790x1350+0+1350 -rotate 90 -despeckle $RA
	    convert $RA -resize 33% -level 10%,90%,0.5 -posterize 32 $TA
	    convert $RB -resize 33% -level 10%,90%,0.5 -posterize 32 $TB
    fi
done

Lastly, I need to create pdfs out of it.

img2pdf tt*.png --author "Fred Smith"  --title "Smithing" -o ../smithing_1925_small.pdf

img2pdf rt*.png --author "Fred Smith"  --title "Smithing" -o ../smithing_1925.pdf