Best process for scanning ink on mylar for dimensioning

[kalaka]

I would like to dimension and add text to an ink on mylar elevation. I had it scanned into a *.tif, and one end of the image was distorted. I don't need to manipulate the image, just use it as an accurate reference to position the dimensions. Any advise is appreciated!

[Car5858]

Xref the .tif image.

[kalaka]

Thanks- I have done that, the problem is with the distortion of the image...

[nukecad]

Try scanning the image again to get a scan without the distortion?

[Tankman]

Perhaps scan in two parts, size, and attached the two images together.

 

I just did this the other day, first time, worked fine.

[kalaka]

Thanks for the info- So what I understand from the above posts is that *.tif should work for this, and the problem is with my scan.

[Car5858]

Can you scan the document to .png file? Or convert the .tif to a .png?

[kalaka]

Yes, I can. What is the advantage of that?

[Car5858]

Sometimes the image can be can be altered easily.

 

The image on the right is a jpeg, tif in the center and png on the right.

 

Depending on your back groung color viewing of it image is sometimes better with the png.

 

With the png I can sharpen the image to get fine lines, using a negative function in the photo editing software, will result in the lines represented with one or two pixles in width. These are easy to follow without worry from the distortion the backgroung of the image may produce in other formats.

 

Although this attachment is a jpeg image I hope you can see the difference. When I xref raster images into AutoCad they show up much better than this image.

[Coosbaylumber]

I often scan in plans a lot larger than 24 by 36. They come in via the TIF format, usually in some sort of 200-250 DPI range. They go on to some converter and in to Autocad eventially.

 

On the scans I get the paper seems to turn a few degrees while passing through the machine. Thus dead straight lines often come out on an arc.

 

The distortion at one end can ony be mitigated via re-scanning the page, but in opposite feed direction. You can play around with Photoshop to aleviate the situation you described but also spend a lot of time there too.

 

When I get to one particular scanned project software, it will come in at dead square in appearances. Tracing or conversion only magnifyies the situation. That X for Y factor is all shot, and the image is only then used for reference.

 

Wm.