Category Archives: image processing

Create button images in WPF and C#

Posted on September 16, 2020 by RodStephens

It seems like I’m constantly building programs like this one to create simple button images that I can use in other programs. This example uses XAML code to create some simple button images. The program’s code then saves those images … Continue reading →

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Overlay parts of images in C#

Posted on September 8, 2020 by RodStephens

My previous post Brighten pixels in an image in C# lets you brighten certain pixels in an image. Unfortunately is often brightens pixels outside of the area that you want to modify. For example, in the left side of the … Continue reading →

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Brighten pixels in an image in C#

Posted on September 7, 2020 by RodStephens

Sometimes when I take a picture, the poor lighting makes some pixels come out less brightly than I would like. For example, in the picture on the right the red raspberries aren’t very red. This example lets you brighten pixels. … Continue reading →

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Perform binary contrast enhancement more quickly in C#

Posted on September 5, 2020 by RodStephens

The example Perform binary contrast enhancement interactively in C# lets you convert an image into completely black and white pixels depending on their brightness. Pixels that are brighter than a given cutoff value are converted into white. Those that are … Continue reading →

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Make a blended composite image in C#

Posted on August 27, 2020 by RodStephens

The other day I wanted to do something that all of us do from time to time: make a composite image with the Eye of Sauron on top of another picture. This turned out to be a bit more complicated … Continue reading →

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Crop scaled images to a desired aspect ratio in C#

Posted on August 19, 2020 by RodStephens

I often need to crop images and sometimes I want a specific aspect ratio. (In case you haven’t heard this term before, the aspect ratio is the ratio of the image’s width to height. As an equation, it’s width / … Continue reading →

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Colorize images in C#

Posted on August 15, 2020 by RodStephens

This example produces some impressive results, but it’s actually quite simple. It uses ImageAttribute techniques demonstrated by several other examples to quickly manipulate an image’s colors. Adjust Color The following AdjustColor method starts the process of coloring an image. // … Continue reading →

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Sprialize an image in C#

Posted on July 10, 2020 by RodStephens

This example shows how to spiralize an image. By spiralize I mean shade pieces of the picture with different colors so the colored areas for a spiral as shown in the picture. This could be a difficult problem. Fortunately I’ve … Continue reading →

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Crop scaled images to specific sizes in C#

Posted on June 1, 2020 by RodStephens

This example lets you crop scaled images to specific sizes in C#. The post Crop images to specific sizes in C# lets you drag a rectangle of a specified size around on an image to pick the part of the … Continue reading →

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Resize pictures in a directory to specific widths or heights in C#

Posted on April 26, 2020 by RodStephens

The post Resize pictures in a directory in C# lets you resize all of the pictures in a directory but it only scales the images. This example lets you resize pictures so they have a given width, height, or both. … Continue reading →

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