Measure

Firefox Browser latest

I go to web page see image and either stay there or download jpeg.

Now I want to measure portions of the image.

I know one dimension of part of the image only, say 72" for the height
of an item

But I want to measure other feature.

What free tool can I use to do that either as at the web page or on the
downloaded image.

Assume image is not skewed but is flat so scaling it is OK.

In article ,
says...

Firefox Browser latest

I go to web page see image and either stay there or download jpeg.

Now I want to measure portions of the image.

I know one dimension of part of the image only, say 72" for the height
of an item

But I want to measure other feature.

What free tool can I use to do that either as at the web page or on the
downloaded image.

Assume image is not skewed but is flat so scaling it is OK.

Think most paint programs would tell you dimensions of image and also
where you pointer is within that pic. The math I suggest is your task

As an example - it's 30 pixels between two points along one edge. You
know this to be 10' in real life. Image is 300 pixels along that entire
edge. Therefore entire edge is 300/30=10. That's assuming pic was taken
"straight on" without perspective being any real issue.

Measure wrote:
Firefox Browser latest

I go to web page see image and either stay there or download jpeg.

Now I want to measure portions of the image.

I know one dimension of part of the image only, say 72" for the height
of an item

But I want to measure other feature.

What free tool can I use to do that either as at the web page or on the
downloaded image.

Assume image is not skewed but is flat so scaling it is OK.


Use an image editor.

https://en.wikipedia.org/wiki/GIMP

There is a rotate function in there, which will rotate the
whole canvas. Use a selection rectangle to measure the
reference dimension. The selection rectangle will show
WxH coords in pixels when you make the selection.

Select the whole canvas again, and rotate the image until
the thing you want to measure is on a major axis. Use the
rectangular selection again to make a new measurement.

Take ratios, multiply, and you have your second dimension.

70px/30px times 6 feet = 14 feet

As for the image editor, the version of that you use
is an acquired taste. I use an older version with a
slightly less annoying interface on it. GIMP aspires
to be Photoshop, when there really isn't a need to
duplicate the look and feel of Photoshop exactly. The
program will never be Photoshop, ever, so I don't
see a reason for the pretense (GIMP doesn't have a
macro recorder). Anyway, you can drill down into the
download page and find a copy there. I expect when
you click this, the file will actually come from a
randomly selected mirror site.

https://download.gimp.org/mirror/pub...i686-setup.exe

I just generally find the floating palettes concept
to be annoying on the small screens I use here. I don't
have a giant monitor or anything.

The other feature I was looking for, is a Save/Save As
interface. You can open a Photoshop file, with Photoshop
file extension, then "Save As" GIF, and it'll do it.
On the newer versions, they treat you like a child.
The Save box only saves documents in .xcf format (a format
only GIMP understands, which compresses like Photoshop
native format would). The Export box provides the ability
to save the image as GIF if you want. Because of that
clumsy interface, you're constantly selecting the Save
interface, when you really wanted the Export one. So to
avoid the Export interface ever again, I went back to
an old version I had (2.4.7).

The program will also take screen shots, with an "Acquire"
function. If you want to capture something on your screen,
you can, then Save As GIF or whatever.

Some of the GIMP functions are "buried pretty deep". I
made an animated GIF a couple times with it, but I doubt
I could remember where you do that now.

The program has a manual. They do provide a PDF for the thing.

Paul

On 12/17/2017 4:53 PM, Measure wrote:
Firefox Browser latest

I go to web page see image and either stay there or download jpeg.

Now I want to measure portions of the image.

I know one dimension of part of the image only, say 72" for the height
of an item

But I want to measure other feature.

What free tool can I use to do that either as at the web page or on the
downloaded image.

Assume image is not skewed but is flat so scaling it is OK.

Do you mean something like this?

http://download.cnet.com/Pixel-Ruler...-75312528.html

In message , pjp
writes:
In article ,
says...

Firefox Browser latest

I go to web page see image and either stay there or download jpeg.

Now I want to measure portions of the image.

I know one dimension of part of the image only, say 72" for the height
of an item

But I want to measure other feature.

What free tool can I use to do that either as at the web page or on the
downloaded image.

Assume image is not skewed but is flat so scaling it is OK.

Think most paint programs would tell you dimensions of image and also
where you pointer is within that pic. The math I suggest is your task
[]
IrfanView, and I suspect some other image prog.s, will tell you not only
where a selection starts, but what its dimensions are. (In pixels.) So
if you have say a 400×300 image, and you select a portion of it, IV will
tell you that your selection is say 100×20 (and its origin is say 30,
40, if you need that), and I presume other softwares will do similarly.
In IV the figures are in the title bar (top) and status line (bottom),
depending what you're doing.
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

Grief generates a huge energy in you and it's better for everybody if you
harness it to do something. - Judi Dench, RT 2015/2/28-3/6