How do I make this survey map scan easier to read?

DE
Posted By
Dan E
Sep 2, 2006
Views
311
Replies
5
Status
Closed
Here http://www.preferredcountry.com/Survey.pdf is a survey map scan that I need to fix to make it more readily readable when it’s cropped, compressed etc. I’ve tried making changes on a PDF copy, on a PSD version, and on a JPEG, in each case converting to grayscale, then adjusting the contrast – the preview shows a significantly more readable image, but when I click on the OK button to accept the contrast change, the image reverts to its original contrast – is that normal? (I’m using Photoshop CS). Any suggestions for how to make the image easier to read (and the final version will need to have some color, so I’ll convert to RGB I guess) would be infinitely welcome. All suggestions and help acknowledged and VERY gratefully received.

TIA,

Dan


Dan E
webbie(removethis)@preferredcountry.com
MR
Mike Russell
Sep 2, 2006
"Dan E" <webbie(removethis)@preferredcountry.com> wrote in message
Here http://www.preferredcountry.com/Survey.pdf is a survey map scan that I need to fix to make it more readily readable when it’s cropped, compressed etc. I’ve tried making changes on a PDF copy, on a PSD version, and on a JPEG, in each case converting to grayscale, then adjusting the contrast – the preview shows a significantly more readable image, but when I click on the OK button to accept the contrast change, the image reverts to its original contrast – is that normal? (I’m using Photoshop CS). Any suggestions for how to make the image easier to read (and the final version will need to have some color, so I’ll convert to RGB I guess) would be infinitely welcome. All suggestions and help acknowledged and VERY gratefully received.

There is a glitch in Photoshop’s preview interface. A zoomed out image containing only pure black and white pixels will appear to respond to tone adjustments, when in fact it is not.

Unfortunately the images are bitmaps which means that you cannot directly adjust them using levels or contrast. You can still improve the existing images somewhat. When converting them to Grayscale, specify a size ratio of between 2 and 3, which will give you some gray levels to work with. BTW I recommend that you use Levels instead of Contrast or Brightness for this. —
Mike Russell
www.curvemeister.com/forum/
DE
Dan E
Sep 2, 2006
Many thanks, Mike.

Dan
"Mike Russell" wrote in message
"Dan E" <webbie(removethis)@preferredcountry.com> wrote in message
Here http://www.preferredcountry.com/Survey.pdf is a survey map scan that I need to fix to make it more readily readable when it’s cropped, compressed etc. I’ve tried making changes on a PDF copy, on a PSD version, and on a JPEG, in each case converting to grayscale, then adjusting the contrast – the preview shows a significantly more readable image, but when I click on the OK button to accept the contrast change, the image reverts to its original contrast – is that normal? (I’m using Photoshop CS). Any suggestions for how to make the image easier to read (and the final version will need to have some color, so I’ll convert to RGB I guess) would be infinitely welcome. All suggestions and help acknowledged and VERY gratefully received.

There is a glitch in Photoshop’s preview interface. A zoomed out image containing only pure black and white pixels will appear to respond to tone adjustments, when in fact it is not.

Unfortunately the images are bitmaps which means that you cannot directly adjust them using levels or contrast. You can still improve the existing images somewhat. When converting them to Grayscale, specify a size ratio of between 2 and 3, which will give you some gray levels to work with. BTW I recommend that you use Levels instead of Contrast or Brightness for this.

Mike Russell
www.curvemeister.com/forum/

J
j
Sep 3, 2006
"Dan E" <webbie(removethis)@preferredcountry.com> wrote in message
Here http://www.preferredcountry.com/Survey.pdf is a survey map scan that I need to fix to make it more readily readable when it’s cropped, compressed etc. I’ve tried making changes on a PDF copy, on a PSD version, and on a JPEG,

Something like this?
http://elearning.winona.edu/ald1/road_trip/big_map/default.h tm

Dunno.

Clue me in.
DE
Dan E
Sep 3, 2006
Thanks, J.

Dan
"j" wrote in message
"Dan E" <webbie(removethis)@preferredcountry.com> wrote in message
Here http://www.preferredcountry.com/Survey.pdf is a survey map scan that I need to fix to make it more readily readable when it’s cropped, compressed etc. I’ve tried making changes on a PDF copy, on a PSD version, and on a JPEG,

Something like this?
http://elearning.winona.edu/ald1/road_trip/big_map/default.h tm
Dunno.

Clue me in.

J
j
Sep 3, 2006
"Dan E" <webbie(removethis)@preferredcountry.com> wrote in message
Thanks, J.

Dan
"j" wrote in message
"Dan E" <webbie(removethis)@preferredcountry.com> wrote in message
Here http://www.preferredcountry.com/Survey.pdf is a survey map scan that I need to fix to make it more readily readable when it’s cropped, compressed etc. I’ve tried making changes on a PDF copy, on a PSD version, and on a JPEG,

Something like this?
http://elearning.winona.edu/ald1/road_trip/big_map/default.h tm

The original image you have to work with doesn’t appear to be terribly sharp, so serving the PDF you have is likely to be the best approach.

The image in the link (winona) was made up of many separate large high-resolution images. (In print form the image be something like 12′ tall.)
Dunno.

Clue me in.

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