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This useful and simple technique can be employed to create effects similar to what computer users can get with their special software programs. You can even put "watermarks" in your images that will prevent others from snitching them without permission. Above in the title image and below are several examples of the Transparency Effect:

This tutorial is for those who know how to Draw, Annotate and Composite. If you do not know how to make a background from scratch at Image Magick, please click here.
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DIRECTIONS:

You'll need to do a little preparation before starting this process.
    1. Find the image that you'd like the transparency effect to show on. Put its url into your Find box.


    2. Take the image to the Image Magick of your choice. Write down the width and height of the image.


    3. Click on the image. Move the arrow to the starting of the Draw (lines, elipses, etc), or Annotation. Copy down the two numbers that now show at the bottom left under the image. Do the same until you have collected all these coordinates that you'll need to make the drawing (or the text).


    1. Go to top of screen and click on Input.


    2. Delete the url in the box and leave that box blank.


    3. Create an xc BLACK background of the same dimensions as the original image.
      NOTE: You may want to make the xc smaller, depending on the desired outcome.


    4. In either Draw or Annotate, enter the proper coordinates, select gravity, type of Draw or Font.
      Select Fill and/or Stroke Color: #232323.
      Stroke Width: 1 or 5 or 10, whatever gives the desired effect.
      Click on Draw or Annotate.
      An Example


    5. If you don't like the results, back up and change whatever needs changing. Don't worry about hardly being able to see the #232323 color against the black.


    6. Now you can either save the black background, or continue to the Composite page.


    1. At the Compose screen, enter the url of the original image.


    2. If you have made the black background the same size as your image, leave the gravity alone. If the background is smaller, choose the appropriate gravity setting.


    3. Choose the Blend composite under Options. Click on Compose.


    4. If you have planned everything carefully, and made the xc background carefully, the result should please you. The colors of the original will be the same except for a seeming transparency with the drawn figure and/or the text. These will appear lighter with the colors of the image showing through somewhat, as in the above examples.


    5. Output as a jpeg, Single File; Image Type: Truecolor; Quality: 80 or leave blank (default 75); and type in any comments you wish.


    6. Or back up to the black xc background, make the necessary changes, and do the Composite again.

TIPS:

  1. Color: most userful #232323. If this is not bright enough, try #343434, or #454545 or #565656, which is as bright-light as I feel will give good results.


  2. Try different "degrees" of transparency effects with the same image. Title image: left circle is #232323; text is #565656.

    Use the Paint feature to make the color changes (quicker).


  3. If you have used Draw, then try going to Annotate and "signing" your name onto the black xc background. This will give your name the same effect as the Draw.


  4. If you make the xc backgound larger than your image, you can Annotate or Draw a decorative border in that additional space.

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Choco's Pop Art tute makes use of large blocks or squares for a transparent effect.

Flo's Image Magick Tutorials




Wednesday 08th of February 2012 05:34:02 AM

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