Create a Multipage File from Multiple Images - Python

This tutorial shows how to merge images into a single multipage file in a Python application using the LEADTOOLS SDK.

Required Knowledge

Get familiar with the basic steps of creating a project by reviewing the Add References and Set a License tutorial, before working on the Create a Multipage File from Multiple Images - Python tutorial.

Create the Project and Add LEADTOOLS References

Start with a copy of the project created in the Add References and Set a License tutorial. If you do not have that project, follow the steps in that tutorial to create it.

The references needed depend upon the purpose of the project.

This tutorial requires the following DLLs:

• Leadtools.dll
• Leadtools.Codecs.dll

For a complete list of which DLL files are required for your application, refer to Files to be Included With Your Application.

Set the License File

The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer to Setting a Runtime License.

There are two types of runtime licenses:

• Evaluation license, obtained at the time the evaluation toolkit is downloaded. It allows the toolkit to be evaluated.
• Deployment license. If a Deployment license file and developer key are needed, refer to Obtaining a License.

Add the Merge Image Code

With the project created, the references added, and the license set, coding can begin.

In the Solution Explorer, open Project-Name.pyand place the following references below the "Add references to LEADTOOLS" comment

from leadtools import LibraryLoader 
LibraryLoader.add_reference("Leadtools") 
from Leadtools import * 
LibraryLoader.add_reference("Leadtools.Codecs") 
from Leadtools.Codecs import * 
from System.IO import * 
import glob 

Inside the main() method create a string array that will contain the file paths to all the CMP files in the given directory. Then, create a new string value that will contain the file path to output the single multipage TIFF file.

def main(): 
    Support.set_license(os.path.join(DemosTools.get_root(), "C:\LEADTOOLS23\Support\Common\License")) 
 
    files = glob.glob(r"C:\LEADTOOLS23\Resources\Images" + "**/*.cmp") 
    multipage_file = r"C:\LEADTOOLS23\Resources\Images\merged.tif" 
    merge_files(files, multipage_file) 

Add a new method in the Project-Name.py file, named merge_files(files, output_file). This method will be called inside the main() method as shown above. Add the code below to the new method to grab each CMP file from the given directory and append each image to a multipage TIFF file.

def merge_files(files, output_file): 
    codecs = RasterCodecs() 
    for file in files: 
        print(f"Adding file: {file}") 
        image = codecs.Load(file) 
        codecs.Save(image, output_file, RasterImageFormat.TifJpeg411, 0, 1, -1, 1, CodecsSavePageMode.Append) 

Run the Project

Run the project by pressing F5, or by selecting Debug -> Start Debugging.

If the steps were followed correctly, the console appears and the application loads each CMP file from the C:\LEADTOOLS23\Resources\Images directory and appends each image to a single multipage TIFF file.

Wrap-up

This tutorial showed how to add the necessary references to save TIFF images as well as how to merge images into a multipage file using the RasterImage and RasterCodecs classes.

See Also

• LEADTOOLS RasterImage Documentation
• LEADTOOLS RasterCodecs Documentation
• LEADTOOLS SDK Download