Learn the how to create watermark on an image using text or another image. Also learn how to scale images to different sizes.

1. Scaling and Watermarking
Images
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2. Overview
Objective
Learn the how to create watermark on an image using text or
another image. Also learn how to scale images to different
sizes.
Requirements
 Understanding of Image Basics
 Installed version of Imagick
Estimated Time
10 minutes
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3. Follow Along With A Code
Example
1. Download a copy of the example code at
www.prodigyview.com/source.
2. Install the system in an environment you feel comfortable
testing in.
3. Proceed to examples/avi/ScaleandWatermarkImage.php
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4. Scaling An Image
To start this store we need an image to scale. First we are
going to define our image and afterwards we are going to scale
it too different sizes using PVImage::scaleImage.
1. Define the image and pass the 2. Set the new width 3. Set the new height
image location as an argument
4. The location of the scaled image

5. Scaled Images
The scaled images should look something similar to
below. Both of these are much smaller than the original.
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6. Scaling With Options
Depending on the scenario, such as images stored as
bytes in the database, you might receive the image a
string in php. This is not a problem, we just set the type to
blob.
1. Read the image in from a file as a string 2. Set the file option to ‘blob’
for images in blob/bytes/string
format
3. Use a defined image name instead of a random Do not add an extension to the
4.
one filename

7. Scaled With Options 2
Now that we have our options set, we can scale the
image from the bytes read from the file, and write it out to
file.
1. Pass in the bytes string from the file 2. Set the width and height
3. Pass in the options

8. Watermark with Text
Add we move on watermarking images. Watermarking
with text is relatively simple. All we need is the image to
watermark and a string of text.
1. Location of the image
2. Text to place as a watermark

9. Watermarked Image
Our watermarked image, without any modifications, will
look like below.

10. Text Watermarking with Options
Our previous example of watermarking can be a little
bland. With some options, we can add some style to the
watermarks.
1. Read the image in as bytes 2. Change the font color 3. Rotate the text
4. Offset the set 5. Set the name of the file 6. Use blob for byte input

11. Watermarked Image with Flavor
Pass in the variables and we should get back our image
with an altered text watermark.
1. Pass in the image bytes 2. Set the text 3. Pass in the options

12. Watermark with Image
Our final demonstration in this tutorial is watermarking with
another image. What the method
watermarkImageWithImage() really does is combine two
images together. In our example we use a smaller image of the
same image, but in production environment, it is suggested to a
very light image.

13. Two Images Combined
Below is how the images looked combine. Replace with
your own image and change the offset to customize the
watermark.

14. Review
1. Scale an image using the PVImage::scaleImage()
method.
2. Watermark an image with text using the
PVImage::watermarkImageWithText() method
3. Watermark/Combine two image with another image
using PVImage::watermarkImageWithImage()
method.
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15. API Reference
For a better understanding of the image manipulation, check
out the api at the two links below.
PVImage
More Tutorials
For more tutorials, please visit:
http://www.prodigyview.com/tutorials
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