FAQ.en.md

简体中文

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Frequently Asked Questions

What is the relationship between imglib and Thumbnailator?

From a certain point of view, imglib and Thumbnailator are independent of each other, imglib has not modified any API of Thumbnail, but only extended some capabilities on the basis of it, and all these extensions can be found in module ext-t8s.

In addition, imglib provides a very convenient way to use Thumbnailator, as follows:

ImagePipes.ofEmptySource()
        ...  
        .toThumbnails()
        ...
        .toFile("output filename");

Why am I getting OutOfMemoryError and what can I do about it?

OutOfMemoryError is an eternal topic. At this stage of the project, as long as the principles adopted are not OutOfMemoryError caused by memory leaks, they can only provide a roundabout solution. I am sorry for this. Examples are listed below.

1. Sometimes we may need to load or create an image with a large size, which will take up a lot of memory space. Usually, the information of a pixel is represented by 4 bytes of ARGB, so its approximate memory usage can be calculated by width * height * 4.For example, a 1000*1000 pixels image requires 4 MB (1000 * 1000 * 4 / 1000 / 1000) memory of heap.

If the Java Virtual Machine does not have enough heap allocated to it, you'll likely encounter OutOfMemoryErrors.

You'll need to adjust the JVM heap memory based on the expected memory sizes that your application will take up. How to configure the JVM heap is outside the scope of the Thumbnailator project. Please consult your JVM documentation on how to configure it.