Researching Airport History -- Help, please!

I have uploaded a few Iowa City Municipal Airport images to
alt.binaries.pictures.aviation

Thanks, Steven! They will make a fine addition to the history.

Not complaining, just curious: The pix all seem to have a very fine
checkerboard pattern on them. Is this imparted in scanning, or was it on
the originals?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

"Jay Honeck" wrote in message
news:QTj9d.200765$MQ5.54602@attbi_s52...

Thanks, Steven! They will make a fine addition to the history.

Not complaining, just curious: The pix all seem to have a very fine
checkerboard pattern on them. Is this imparted in scanning, or was it on
the originals?


It's in the scanning. A different resolution can sometimes eliminate it.

"Steven P. McNicoll" wrote in message
ink.net...

"Jay Honeck" wrote in message
news:QTj9d.200765$MQ5.54602@attbi_s52...

Thanks, Steven! They will make a fine addition to the history.

Not complaining, just curious: The pix all seem to have a very fine
checkerboard pattern on them. Is this imparted in scanning, or was it
on
the originals?


It's in the scanning. A different resolution can sometimes eliminate it.

I suspect that is a Moiré pattern caused by dot scanning a photo with
dots on it. Steven, take a close look at the photos you scanned and see if
they were printed with a screen that left dots. If they are, check the
scanner's user guide. Most scanners have a correction that can be applied to
significantly reduce the effect.

"Casey Wilson" wrote in message
news:Ydl9d.8547$Sl2.1043@trnddc09...

I suspect that is a Moiré pattern caused by dot scanning a photo with
dots on it. Steven, take a close look at the photos you scanned and see if
they were printed with a screen that left dots. If they are, check the
scanner's user guide. Most scanners have a correction that can be applied
to significantly reduce the effect.


I'm using a Lexmark X75 combo. It didn't mention Moiré in the "Help" menu,
but it did mention dot patterns:


To remove image patterns from black and white or gray items:

1 Open the Lexmark X74-X75 All-In-One Center.

2 If the Scan. section of the All-In-One Main Page is not expanded, click
See More Scan Settings.

3 Click Display Advanced Scan Settings.

4 From the Image Enhancements tab, select Smooth conversion of gray image
to black and white dot pattern (dither), and then select a dithering
algorithm from the drop-down menu.

5 Click OK to save your changes and return to the All-In-One Main Page.

6 Open the top cover on your scanner, and then place an item face down on
the glass.

7 Close the top cover.

8 From the All-In-One Main Page, click Scan Now.

9 Save your scanned item.


I followed that procedure and rescanned the 1937 IOW image. It's worse than
it was before. The image is posted in alt.binaries.pictures.aviation

There is a drop down menu where one must select a dithering algorithm. The
selections are Burkes, Floyd-Steinberg, Sierra, and Stucki. I used Burkes.
I'll work with it a bit to see if I can improve the image.

"Jay Honeck" wrote in message
news:QTj9d.200765$MQ5.54602@attbi_s52...

Thanks, Steven! They will make a fine addition to the history.

Not complaining, just curious: The pix all seem to have a very fine
checkerboard pattern on them. Is this imparted in scanning, or was it on
the originals?


I changed the settings on my scanner and rescanned the images. That pattern
is gone and the images are larger and show more detail. Of course, the
files are larger as well. They've also been posted to
alt.binaries.pictures.aviation

I changed the settings on my scanner and rescanned the images. That
pattern
is gone and the images are larger and show more detail. Of course, the
files are larger as well. They've also been posted to
alt.binaries.pictures.aviation

Those are AWESOME! Thanks!

I just added the originals to the IC Airport History website earlier today.
I'll have to re-do it with these new scans tomorrow.

BTW: There were only three of the new scans on the binary channel -- was
that correct, or did I somehow miss the other ones?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

"Jay Honeck" wrote in message
news:GGI9d.213777$D%.137529@attbi_s51...

BTW: There were only three of the new scans on the binary channel -- was
that correct, or did I somehow miss the other ones?


I posted images from 1937,1948, 1959, 1970, 1982, and 1989. I see all of
them in the binaries group.

"Jay Honeck" wrote in message
news:GGI9d.213777$D%.137529@attbi_s51...

BTW: There were only three of the new scans on the binary channel -- was
that correct, or did I somehow miss the other ones?


I posted images from 1937,1948, 1959, 1970, 1982, and 1989. I see all of
them in the binaries group.

I changed the settings on my scanner and rescanned the images. That
pattern
is gone and the images are larger and show more detail. Of course, the
files are larger as well. They've also been posted to
alt.binaries.pictures.aviation

Those are AWESOME! Thanks!

I just added the originals to the IC Airport History website earlier today.
I'll have to re-do it with these new scans tomorrow.

BTW: There were only three of the new scans on the binary channel -- was
that correct, or did I somehow miss the other ones?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"