ImageMagick: Transparify ~ Change Color

ImageMagick Tutorials

<center><marquee scrollamount=100 width=120>Bug</marquee> <center><marquee scrollamount=108 width=103>Reload</marquee></center> Image Magick is the creation of web innovator, John Cristy, a man committed to the ideal of freely available services on the world wide web.
An official Image Magick message board is provided for help and to report problems. Register and post only in the Magick Studio Forum.

Image Magick Studio is currently hosted at these servers. If one is not working satisfactorily, try another.

Examples of what ImageMagick can do.

How to transparify images.

How to change image colors.

How to annotate (write on) images.

How to composite images.

How to add and remove image comments.

How to resize images.

How to make an animation.

How to change the speed of an animated gif.

How to change the number of repetitions (loop) of an animated gif.

How to remove a specific frame from an animated gif.

How to morph images.

How to crop images.

How to chop crop images.

How to rotate images.

*NOTE*

Image Magick only stores the rendered images on their system for a short while. Always transload the output to your homepage promptly.

How to Transparify Using
Image Magick

Put the url of the image you want to transparify into the text field where it asks for the URL and hit the view button.

On the next page you will see the image.

Beneath the image are dropdown menus for Method and Paint Type. There are also input boxes for Fuzz and Fill Color and Border Color.

On the dropdowns choose:

Method

Paint Type

Type 9999 in the Fuzz input box and delete or type none in the Fill Color and Border Color boxes.

Fuzz

9999

Then scroll up and cursor over the image. Click to activate the pointer arrow. Move the pointer over the color to be transparified and click.

Background colors are usually transparified, as in this example.

Before

After

Not only backgrounds can be transparified. Here the hair color was transparified.

That concludes basic transparifying directions. Here is additional information.

Both gifs and jpegs can undergo transparifing. But only gifs can exist as transparified files. Transparified jpegs must be output as gifs.

Only images with areas of solid and similar colors can be effectively transparified. The gif used above is a good example.

Photographic jpeg images cannot be transparified. They contain too many colors.

Fuzz 9999 will transparify the color clicked and all similar colors. Use smaller fuzz numbers (1111, 2222, 3333, 4444, 5555, etc.) if too much color is transparified by 9999.

Instead of Replace, good results can sometimes be realized by choosing Floodfill on the Method dropdown button.

Once the image is done, go to the top of the screen and click on the Output tab.

On the next page select:
Format: gif
Storage type: single file for static images or multi-frame file for animated ones.
Then click where it says Press to (output) your image or (reset) the form.

Finally, click on the displayed image to get the url for prompt transloading.

How to Change Colors Using
Image Magick

Put the url of the image you want to change colors into the text field where it asks for the URL and hit the view button.

On the next page you will see the image.

Beneath the image are dropdown menus for Method and Paint Type. There are also input boxes for Fuzz and Fill Color and Border Color.

On the dropdowns choose:

Method
Paint Type

Type 9999 or 8888 or 7777... or down to 1111 in the Fuzz input box. The higher the number, the greater the range of colors similar to the one clicked on will be changed.
Input a color name or hex number in the Fill Color box. The ampersand must precede the hex number. Leave the Border Color box as is.

Fuzz

5555

Fill Color

red or #ff0000

Border Color

none

Then scroll up and cursor over the image. Click to activate the pointer arrow. Move the pointer over the color to be changed and click.
Solid colors are changed, as in this example. The hair used Fuzz: 5555, Fill Color: red. The jacket used Fuzz: 1111, Fill Color: pink. The background was also transparified.

Before
After

Click here for the rest of the steps to ouput the image.

The first Image Magick tutorials were created by Josh Wilson in 1999. He has left WebTV and could not be reached despite every effort. His site is unmaintained, abandoned, and at risk of deletion by Tripod for inactivity.
Basic Image Magick tutorials are a valuable resource. So I have recreated them with new information, links and graphics. They will be actively maintained, updated, and improved.

Copyright © 2002 - Ty_Tutes by Tyhart