The first and foremost question in your mind could be, is it about converting an RGB image to Grayscale only? No, you can convert almost any document format (including images) to a black-and-white or grayscale monochrome image. The contrast ranges from black at the weakest intensity to white at the strongest. In this article, we will discuss how to convert color PDF documents to grayscale JPG and PNG image formats using C#.
This feature is quite helpful if you are going to do image processing. As RGB image is represented by 3 channels and contains a lot of data/noise, hence, more computational power is required to process such an image. On the other hand, a grayscale image makes this process comparatively easy.
.NET API to Convert Documents into Grayscale
GroupDocs.Conversion for .NET is an API that is used for documents conversion between a multitude of supported file formats and image types. Conversion results can easily be customized and tuned with multiple flexible options. I will use this API to convert PDF documents to grayscale JPG and PNG images.
You can download the DLLs or MSI installer from the downloads section or install the API in your .NET application via NuGet.
PM> Install-Package GroupDocs.Conversion
If we talk about its implementation, it is a back-end API that can be integrated or implemented within any .NET application without any dependency. For more information about its API, visit its documentation.
Convert PDF to Grayscale JPG Image using C#
Let’s quickly achieve the target by transforming the color PDF document to black and white image formats. The following steps show how to convert the PDF to grayscale JPG using C#.
- Load the PDF document using Converter class.
- Prepare the image conversion options.
- Set the conversion file format as JPG.
- Set the grayscale option to true.
- Convert to image using Convert method.
The following C# source code converts the PDF document to a grayscale JPG image.
Additionally, there are many other options to control the height, width, horizontal and vertical flip, and document rotations. You can also apply the watermarks with different settings to the output image.
Convert PDF to Grayscale PNG Image using C#
Similarly, the color PDF document can be converted to other image formats in grayscale. The following steps show how to convert the PDF to grayscale PNG using C#.
- Load the PDF document using Converter class.
- Prepare the image conversion options.
- Set the conversion file format as PNG.
- Set the grayscale option to true.
- Convert to PNG image using Convert method.
The following C# source code converts the PDF document to a grayscale PNG image.
Get a Free API License
You can get a free temporary license to use the API without the evaluation limitations.
Conclusion
To conclude we learned how PDF documents can be converted to JPG or PNG Images formats in C#. To build your own conversion application, you may learn more about the low code and high code Conversion Automation .NET APIs from the documentation.
The best way is to experience the examples that are available on GitHub. Contact us for any query via the forum.