About
This blog is about a 2 dimensional work of art depicting Kermit the Frog using origami frogs as picture elements (pixels).
Progress
Below we have a graphic built from the ImagigamI editor. It depicts the progress for one of the building categories (Folding, in this case) for creating an ImagigamI image.

Frog Folding Stages
The images, below, illustrate the stages of folding a jumping frog origami form. Each origami frog takes approximately to fold.

Design
The Jumping Frog Pattern
Below is the pattern for the jumping frog I used for the forms in this project.



The generated sheets for the Kermit ImagigamI can be found here.
Original Image
I started with a head shot of Kermit, then scaled it down to 32 × 32 pixels.
Jumping Frog Form
Next, I folded a frog of the appropriate size, traced the outline and mapped the points into a custom software application (I wrote) called ImagigamI. The definition of the form will be used, much later, to create a template for mounting the frogs into a surface (probably plywood).
What is the ‘appropriate’ size for the frog?
Well, that depends on the size of the mounting surface to be used for displaying the ImagigamI. I have found a number of possible materials. As the width/height increases after 48”, the price goes up exponentially.

The size I have defaulted to is 48” wide × "the needed size for the height."

For example, the Kermint design is 30 columns × 31 rows. For this discussion we will say that each origami frog is 1.25” × 1.5”.

Given these dimensions, the mounting surface must be a miniumum of

(1.25” × 30) × (1.5” 31) = ?in2
37.25 × 46.5 = ?in2
=1,743.75in2

Since the folded frog for is approximate 0.25in wider than it is tall, for this design I reserved enough space at the top and bottom of the frogs to make each frog location “square.”
The Final Adjusted Template Size
For the completed template design, including a little white space around the final dimensions are 48” × 56”. The media from which the mounting surface will be made is 48” × 96”, which is perfect.

Note: the frog is wider than it is tall, so the board will be rotated to landscape in order to fit the design.
Sheet Tags
Sheet tags are various kinds of markings or information that can be added to a generated sheet of origami paper. In the example, below, there are three sheet tags:
  1. Dot 1: provides an alignment indicator for when the body of a frog is folded (creates the triangular shape of the final frog).
  2. Dot 2: provides an alignment indicator for when the tail of the frog is created.
  3. Cell and Index: provides the (x, y) location for the frog as well as its index in the rectangular grid that makes up the image’s pixels. The (x, y) location is useful when attaching the frogs to the mounting template, a vinyl sheet with outlines of the frog locations in light gray. Each outline on the template includes an (x, y) location.
For an example of what a section of the template looks like, see the Mounting Test section, below.

Printed Origami Sheets
Below, we have a screen shot of a generated set of origami sheets. Notice how the sheet marks were used to generate the two dots, (x, y) and index information.

Once sheets of this type are printed, an X-Acto knife is used to cut them into individual origami sheets for folding.

Below, we have an image of a frog’s bottom to illustrate the information printed on each generated origami sheet. The first two numbers are the cell number for the form. That is, the first number is the column (x) and the second number is the row (y). The third number is the index or the form. The index is useful in case the sheet needs to be reprinted.

Once the forms are attached to the template, these numbers will no longer be visible.

Projected Image
The end result of the project will be a 2 dimensional image of Kermit the Frog composed of origami frogs. The custom software produces a projection of the final project…
A Single Frog with Quarter
A single frog with a quarter for scale. They may seem small, but when the entire project put together, the image with 687 origami frogs will be approximately 58” × 48”.

Is Fiberboard Better than Plywood?
Here we have a piece of fiberboard stapled to a piece of plywood. This was a test to determine if my staple gun would penetrate the fiberboard well enough to afix it to stabilizing struts on the back of the work.

I was unable to pry the fiberboard from he plywood with my fingers, so I feel this will prove an adequate method for attaching the fiberboard to struts.

Mounting Test
For a previous project using paper cranes, I mounted the template onto plywood. This turned out to be a massive headache as the plywood was heavy, unsmooth, awkward to handle, and a general nuisance.

So, I’m going with fiberboard, this time. It is quite strong. I bought an 8’ × 4’ sheet of fiberboard, today, and experimented with mounting cranes to an 11” × 11” piece.

I forwent staples for aesthetic reasons. This test will have these mounted frogs exposed to the heat and humidity of my garage for a month to determine if the super glue used to mount the frogs will remain proof against such environmental elements.

Storing the Frogs
Managing more than 700 cranes can be frustrating without an effective system for organizing and storing them. I manage my printing labels for each row of the ImagigamI image and storing each row’s frogs in its own bag.

Below, we have a photograph of one row’s frogs.

The Template
The “template” has been mentioned throughout this blog. The template is nothing more than a vinyl sheet with an outline for each frog in the design printed on it. Inside each outline is the (x, y) coordinate for its frog. Each of the folded frogs has an (x, y) coordinate printed on it. To mount the frogs, simply find the correct frog for each outline and glue it there.1

Once the template is printed (by a vendor), it is glued to the mounting surface with and industrial grade adhesive. With that completed, the mounting surface is ready to accept the frogs.

Below, we have the full-sized template for the Kermit ImagigamI. It’s a little light. If you want a better view, right click the image and select Open in new tab.

The template shown is 58” × 48”. To view the template full size, right-click on the image and select “Open image in new tab” or something similar.

Keyed Words
origami, ImagigamI
Footnotes
1To organize the folded frogs and make them easier to manage, I store them in ZipLoc® sandwhich bags. Each row is stored in its own bag. When it comes time to mount a row of frogs on the mounting surface, I find the correct bag for the row, remove the frogs from it, and line them up from left to right.