Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Search found 39 matches

by qv_
09 Jan 2018, 15:27
Forum: Scanners and Build Threads
Topic: Hackerspace scanner, the laser cut version
Replies: 11
Views: 11139

Re: Hackerspace scanner, the laser cut version

Not yet ready, but soon.....

I have spent the last 1 ½ year building a new work shop, Then I have time for this again.
IMG_3197.JPG
I will be back.
by qv_
02 Sep 2017, 07:01
Forum: Cameras and Electronics
Topic: Camera settings for book scanning
Replies: 5
Views: 7152

Re: Camera settings for book scanning

Yes, you're right, the aperture size isn't related to the resolution issues. This is not correct. Aperature is related to the sharpnes of the picture and therefore also to the max possiibole resolution. Every lens have a sweet spoot were is it best. arround f5,6 - f8 is normal. And the cammera shou...
by qv_
01 Sep 2017, 05:47
Forum: Cameras and Electronics
Topic: How to get desired dpi?
Replies: 6
Views: 3252

Re: How to get desired dpi?

This if your copy of the scann is 1:1 If you scann in 300 dpi you can look on the picture on the screnn (72dpi) and it is bigger than the scann. You can print the same scann in 1000dpi if the copy is small enought. But if you scann a paper in 300 dpi and print it in the same size you vill print in 3...
by qv_
01 Sep 2017, 05:30
Forum: Cameras and Electronics
Topic: How to get desired dpi?
Replies: 6
Views: 3252

Re: How to get desired dpi?

If the paper that you like to scann have a side that is 10 inch long and you like to have 300 dpi you need av sensor in your camera that is 300dpi x 10 inch = 3000 pixel wide. Then you have the optical losses in the lens that is minimum 10% Now you need 3300 pixel wide This will work if the lens is ...
by qv_
07 Dec 2015, 09:03
Forum: Lighting
Topic: Infrared LEDs for lighting
Replies: 2
Views: 9262

Re: Infrared LEDs for lighting

in "better" (or all) cameras there is a IR blocking filter in front of the sensor. The camera is constructed to make a image of what we see and therefor the manufakture of the camera has block the IR. I have not try to see what resolution I can get with IR light and I don´t think I will do that. I d...
by qv_
09 Nov 2015, 15:17
Forum: Cameras and Electronics
Topic: Canon A2600 vs Ixus / ELPH 160?
Replies: 6
Views: 5656

Re: Canon A2600 vs Ixus / ELPH 160?

Doing our best to get the clearest images possible, and he had some special filters for long exposures, we still lost 30-50% from pixel to optical resolution. Did you have the light in 45 degree and try different typs of light? I did notis a 50% difference in LPMM depending on the light type and an...
by qv_
06 Nov 2015, 16:08
Forum: Cameras and Electronics
Topic: Canon A2600 vs Ixus / ELPH 160?
Replies: 6
Views: 5656

Re: Canon A2600 vs Ixus / ELPH 160?

- resolution, Ixus 160 has 20mp while A2600 has 16mp. Depending on the size of the book. I like to have 300dpi at the end. 16MP and size A4 is not realy 300DPI in the end - optical zoom, Ixus 160 has x8 while A2600 has x5 you need to see "only the page" so if the zoom is "wrong" you can change the m...
by qv_
11 Oct 2015, 15:15
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 34616

Re: Converting Color/Grayscale Text Scans to Black & White

I also prefer to read paperbooks but the books I scan is workshops manuals for old cars and they will be read in a computer when I need them. But the amount of pages (several tusens) make a need for "easy reading" and reading when scroling the text. There I see that grayscale is mutch more comfortab...
by qv_
03 Oct 2015, 16:00
Forum: Tutorials/How-To's
Topic: Converting Color/Grayscale Text Scans to Black & White
Replies: 34
Views: 34616

Re: Converting Color/Grayscale Text Scans to Black & White

When I read books I find it more comfort to read a text in grayscale vs black & white.

So I am heading for better grayscale to get even more "easy read" books.

/Jan
by qv_
27 Sep 2015, 15:12
Forum: "Destructive" Scanning
Topic: Sheet Fed Scanner for Destructive Scanning
Replies: 17
Views: 34594

Re: Sheet Fed Scanner for Destructive Scanning

I have use a Sharp MX 4101n office mashin for my privet work at the evning. The best with this is that it take both side without extra handeling of the papershet. It have two scanners! so I get both side in one sweep. It goes slower but that OK. You cant use USB for big work. The maskin "hangs". You...