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An image as a signature is an alternative way to put any presenting data in a visual form. This electronic signature type allows the creation of custom images with a company logo, sender’s initials, names and so forth.
GroupDocs.Signature for Python via .NET provides the ImageSignOptions class to specify different settings for image signature such as image content by file or stream, location, colors and advanced effects.
Here are the steps to create an image signature on a document page:
- Create a new instance of the Signature class and pass the source document path as a constructor parameter;
- Instantiate the ImageSignOptions object according to your requirements and specify Image signature options;
- Call the Sign method of the Signature class instance and pass the ImageSignOptions to it.
This example shows how to sign a PDF document with the image signature using Python:
import groupdocs.signature as signature
from groupdocs.signature.options import ImageSignOptions
import groupdocs.signature.domain as gsd
import sys
import os
def run():
with signature.Signature("./sample.pdf") as sign:
# Create image signature options
image_options = ImageSignOptions("./signature.jpg")
# Set signature position
image_options.left = 100
image_options.top = 100
# Set signature size
image_options.width = 100
image_options.height = 100
# Set signature opacity
image_options.opacity = 0.8
# Set signature rotation angle
image_options.rotation_angle = 45
# Set signature alignment
image_options.horizontal_alignment = gsd.HorizontalAlignment.CENTER
image_options.vertical_alignment = gsd.VerticalAlignment.CENTER
# Set signature border
image_options.border_visiblity = True
image_options.border_dash_style = gsd.DashStyle.DASH
image_options.border_color = gsd.Color.BLACK
image_options.border_weight = 2
# Sign document
sign.sign("./SampleSigned.pdf", image_options)
You can customize the image signature further with additional options:
import groupdocs.signature as signature
from groupdocs.signature.options import ImageSignOptions
# Initialize signature
with signature.Signature("sample.pdf") as sign:
# Create image signature options
image_options = ImageSignOptions("signature.jpg")
# Set signature position and size
image_options.left = 100
image_options.top = 100
image_options.width = 200
image_options.height = 100
# Set advanced options
image_options.opacity = 0.8
image_options.rotation_angle = 45
# Set image alignment
image_options.horizontal_alignment = signature.HorizontalAlignment.CENTER
image_options.vertical_alignment = signature.VerticalAlignment.CENTER
# Add border
image_options.border_color = signature.Color.BLACK
image_options.border_style = signature.DashStyle.SOLID
image_options.border_width = 2
# Sign document
sign.sign("SampleSigned.pdf", image_options)
You can also load the signature image from a stream:
import groupdocs.signature as signature
from groupdocs.signature.options import ImageSignOptions
# Initialize signature
with signature.Signature("sample.pdf") as sign:
# Load image from stream
with open("signature.jpg", "rb") as image_stream:
# Create image signature options
image_options = ImageSignOptions(image_stream)
# Set signature position
image_options.left = 100
image_options.top = 100
# Sign document
sign.sign("SampleSigned.pdf", image_options)
This guide demonstrates how to use GroupDocs.Signature for Python via .NET to add image-based signatures to documents. It covers loading a document, configuring the image signature’s properties (such as size, position, and opacity), and saving the signed document. Advanced customization options, like adjusting image appearance and aligning the signature, are also discussed. For further insights, explore related document signing resources.
You may easily run the code above and see the feature in action in our GitHub examples:
Along with the full-featured Python library, we provide simple but powerful free online apps.
To generate image signatures and/or sign your files with them for free, you can use the Generate Image online app.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the other online apps from the GroupDocs.Signature App Product Family.
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