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When you're designing a document and you have to place a bunch of logo endorsements in the document, how do you make all the logos seem the same size?

Is there a more mathematical or scientific way of matching logo sizes other than using your eye?

I am contemplating on using the area size of each logo, but Adobe Illustrator has no way to resize logos according to their area size, you can only resize logos according to their width or height dimensions. The actual area size has to be calculated and it becomes messy and complicated.

marked as duplicate by Scott, Rafael, Luciano, AndrewH, Paolo Gibellini Feb 16 '18 at 13:01

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    Illustrator can tell you the area of an object (via script property area). However the eye does emphasize edges so a object with a lot of edges can be more visible, – joojaa Feb 14 '18 at 18:37
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You have a set of logos you want to display with equal emphasis. Take the most compact shape, a solid circle, to use as your reference. Match the other logo sizes to it.

Here a lot of squinting and estimating come into play.

Tall thin logos need to be taller than the circle.

Short, wide logos need to be wider than the circle.

Solid black logos need to be a little smaller.

Wispy, wiry logos need to be a little bigger.

Lean back in your chair and squint your eyes at your screen until the grid of logos is a blur. Use this view to make their relative sizes appear equal.

Type making tricks come into play, where pointed shapes like a capital A are taller than blocky shapes like a capital E.

  • YOu dont have to lean back just blur and zoom out :) – joojaa Feb 14 '18 at 19:20
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If you are using Indesign CC you can utilize the LIBRARIES. So, determine the size you would like the logo to appear on ALL pages and places in document and drag and drop to your opened LIBRARY window. You will then be able to grab from the library and drop into your document or ANY document, it will always be that size! You can even do several sizes and put them under different titles in the library, ie. large logos, and tagline logos.

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The questioner wanted a mathematical method to scale different logos so that the resulted sizes seem to be equal. There are few ways to drag the mathematics into the process:

A. Let one or more people to do the scaling for a large logo collection. Then a mathematician finds a computable "logo size measuring function" which is forced to match with the result.

B. One derives the logo size measuring function from some accepted perception theory

C. One takes his own ac-hoc logo size measuring function and uses it

The logos are scaled to give the same size when the selected logo size measuring function is applied.

Unfortunately A. and B. are beyond my capablities. But I can give some my own measuring functions:

M1: The amount of ink when the logo is printed as full black on white (or as well total colored area)

M2: Like M1, but the ink is weighted with the distance from the centerpoint of the logo. That's physically the inertial moment.

M3: The perimeter of the bounding box of the logo

Using M1 gives easily too much real estate for those logos which have only thin lines. M2 is better because even the thinnest line gets heavy weight when the line is far enough from the centerpoint. Unfortunately the practical calculation is tricky, but it can be done, if Photoshop is allowed.

M3 is easy. Only check the width and height of the bounding box in the infoline. You can add the width and height, no need to multiply by 2 if all logos are measured in the same way.

An example using M3: These logos are tried to draw approximately to the same size.

enter image description here

In illustrator summed widths and heights are 78mm for logo1, 76mm for L2 and 93mm for logo3. If we let L2 be as is, we must scale logo1 to (76/78) = 97% and L3 to (76/93) = 82%. The results:

enter image description here

M1 is skipped due its weakness. But M2 gets some attention. Weighting is possible in Photoshop. One can add a radial gradient with blending mode multiply and do the average blur. One color channel value in the averaged image is the measure. The result is the following:

enter image description here

We see that thick black gives remarkably less real estate than thin lines.

The scaling of the inertial moments are tricky. The right scaling is the cubic root of the ratio of the measures. Further details are skipped.

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