contrast property

ImageData.contrast property

Gets or sets the contrast for the specified picture. The value for this property must be a number from 0.0 (the least contrast) to 1.0 (the greatest contrast).

@property
def contrast(self) -> float:
    ...

@contrast.setter
def contrast(self, value: float):
    ...

Remarks

The default value is 0.5.

Examples

Shows how to edit a shape’s image data.

img_source_doc = aw.Document(file_name=MY_DIR + 'Images.docx')
source_shape = img_source_doc.get_child_nodes(aw.NodeType.SHAPE, True)[0].as_shape()
dst_doc = aw.Document()
# Import a shape from the source document and append it to the first paragraph.
imported_shape = dst_doc.import_node(src_node=source_shape, is_import_children=True).as_shape()
dst_doc.first_section.body.first_paragraph.append_child(imported_shape)
# The imported shape contains an image. We can access the image's properties and raw data via the ImageData object.
image_data = imported_shape.image_data
image_data.title = 'Imported Image'
self.assertTrue(image_data.has_image)
# If an image has no borders, its ImageData object will define the border color as empty.
self.assertEqual(4, image_data.borders.count)
self.assertEqual(aspose.pydrawing.Color.empty(), image_data.borders[0].color)
# This image does not link to another shape or image file in the local file system.
self.assertFalse(image_data.is_link)
self.assertFalse(image_data.is_link_only)
# The "Brightness" and "Contrast" properties define image brightness and contrast
# on a 0-1 scale, with the default value at 0.5.
image_data.brightness = 0.8
image_data.contrast = 1
# The above brightness and contrast values have created an image with a lot of white.
# We can select a color with the ChromaKey property to replace with transparency, such as white.
image_data.chroma_key = aspose.pydrawing.Color.white
# Import the source shape again and set the image to monochrome.
imported_shape = dst_doc.import_node(src_node=source_shape, is_import_children=True).as_shape()
dst_doc.first_section.body.first_paragraph.append_child(imported_shape)
imported_shape.image_data.gray_scale = True
# Import the source shape again to create a third image and set it to BiLevel.
# BiLevel sets every pixel to either black or white, whichever is closer to the original color.
imported_shape = dst_doc.import_node(src_node=source_shape, is_import_children=True).as_shape()
dst_doc.first_section.body.first_paragraph.append_child(imported_shape)
imported_shape.image_data.bi_level = True
# Cropping is determined on a 0-1 scale. Cropping a side by 0.3
# will crop 30% of the image out at the cropped side.
imported_shape.image_data.crop_bottom = 0.3
imported_shape.image_data.crop_left = 0.3
imported_shape.image_data.crop_top = 0.3
imported_shape.image_data.crop_right = 0.3
dst_doc.save(file_name=ARTIFACTS_DIR + 'Drawing.ImageData.docx')

contrast property

ImageData.contrast property

Remarks

Examples

See Also