# Opening Images

**Opening an Image**

There are several ways to open an image:

1. File -> Open... menu item (or by using the shortcut Control + O). This will open the standard Windows open file dialog box.
2. File -> Open From URL... menu item. You will be able to input an URL that points to an image file. If the URL is valid, the image will be downloaded and displayed ready for processing.
3. Edit -> Paste menu item. If there is a valid image on the clipboard, it will be pasted ready for processing.
4. Drag and drop. You can drag and drop an image file from File Explorer.
5. Application parameter. Use the command prompt, you can append a filename as an option when starting Astra Image. For example:

*C:\Program Files\Astra Image\AstraImage.exe my\_image.jpg*

This would start Astra Image and open the file called "my\_image.jpg".

**Working With Image Data**

As some file formats can support floating-point data, as well as 16-bit integers, Astra Image will normalize an image when it is opened. This means that the pixel values are represented by values from 0.0 to 1.0. When an image is saved, the data will be converted into a range that is supported by the selected file format.


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