Advanced search for Image signatures

GroupDocs.Signature provides ImageSearchOptions class to specify different options to search for Image Signatures.

Here are the steps to search for image signatures within the document with GroupDocs.Signature:

Create new instance of Signature class and pass source document path as a constructor parameter.
Instantiate the ImageSearchOptions object according to your requirements and specify search options
Call search method of Signature class instance and pass ImageSearchOptions to it.

This example shows how to make advanced search for Image signature in the document and further image signatures analyzes with saving image content

Signature signature = new Signature(sample.pdf);
 
PagesSetup pS = new  PagesSetup();
pS.setFirstPage(true);
pS.setLastPage(true);
pS.setOddPages(false);
pS.setEvenPages(false);
// setup search options
ImageSearchOptions searchOptions = new ImageSearchOptions();
searchOptions.setAllPages(false);
searchOptions.setPageNumber(1);
searchOptions.setPagesSetup(pS);
 
// search document
List<ImageSignature> signatures = signature.search(ImageSignature.class,searchOptions);
System.out.print("\nSource document ['" + fileName + "'] contains following image signature(s).");
// output signatures
//foreach to while statements conversion
try
{
    for (ImageSignature sign : signatures)
    {
 
        System.out.print("Found Image signature at page "+sign.getPageNumber()+" and size "+sign.getSize()+".");
        System.out.print("Location at "+sign.getLeft()+"-"+sign.getTop()+". Size is "+sign.getWidth()+"x"+sign.getHeight()+".");
    }
}
catch (Exception ex)
{
    System.out.print("System Exception: " + ex.getMessage());
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.

Advanced search for Text signatures Search for built-in Metadata signatures