使用 Python 进行 ODG 图像背景更改
创建 Python 应用程序以通过服务器 API 更改 ODG 图像和照片的背景
如何使用 Python 更改 ODG 图像和照片的背景
通常,在以 ODG 编辑图像时,需要更改其背景。第一步涉及选择照片中的前景物体,并将它们与图像的其余部分区分开来,以隔离属于背景的区域。当背景构成均匀区域时,可以自动建立物体轮廓。然而,如果照片背景不规则或在区分所需物体与背景时出现复杂情况,建议采用初步图像标记方法。这需要在照片中选择预期对象所在的矩形区域并指定其类型。此类操作可以手动执行或通过云 API 进行自动对象检测。选择对象并删除原始背景后,您可以选择引入新背景或将其渲染为透明。要修改 ODG 格式的图像背景,我们将使用 Aspose.Imaging for Python via .NET API 是一个功能丰富、功能强大且易于使用的图像处理和转换 API,适用于 Python 平台。您可以使用系统命令中的以下命令安装它。
系统命令行
>> pip install aspose-imaging-python-net
通过 Python 在 ODG 中更改背景的步骤
您需要 aspose-imaging-python-net 在您自己的环境中尝试以下工作流程。
- 使用 Image.Load 方法加载 ODG 文件
- 改变背景;
- 以 Aspose.Imaging 支持的格式将图像保存到光盘
系统要求
所有主要操作系统都支持 Python 的 Aspose.Imaging。只需确保您具有以下先决条件。
- 带有 .NET Core 运行时的 Microsoft Windows / Linux。
- Python 和 PyPi 包管理器。
更改 ODG 图像的背景 - Python
from aspose.imaging import Image, RasterImage, Point, Rectangle, Color | |
from aspose.imaging.fileformats.png import PngColorType | |
from aspose.imaging.imageoptions import PngOptions | |
from aspose.imaging.masking import * | |
from aspose.imaging.masking.options import * | |
from aspose.imaging.masking.result import * | |
from aspose.imaging.sources import FileCreateSource | |
from aspose.pycore import as_of | |
import os | |
if 'TEMPLATE_DIR' in os.environ: | |
templates_folder = os.environ['TEMPLATE_DIR'] | |
else: | |
templates_folder = r"C:\Users\USER\Downloads\templates" | |
delete_output = 'SAVE_OUTPUT' not in os.environ | |
def remove_background_processing_with_manual_rectangles(): | |
raster_formats = [ | |
"jpg", | |
"png", | |
"bmp", | |
"apng", | |
"dicom", | |
"jp2", | |
"j2k", | |
"tga", | |
"webp", | |
"tif", | |
"gif", | |
"ico" | |
] | |
vector_formats = [ | |
"svg", | |
"otg", | |
"odg", | |
"wmf", | |
"emf", | |
"wmz", | |
"emz", | |
"cmx", | |
"cdr" | |
] | |
all_formats: list = [] | |
all_formats.extend(raster_formats) | |
all_formats.extend(vector_formats) | |
for format_ext in all_formats: | |
input_file = os.path.join(templates_folder, f"couple.{format_ext}") | |
if not os.path.exists(input_file): | |
continue | |
is_vector_format = format_ext in vector_formats | |
# Need to rasterize vector formats before background remove | |
if is_vector_format: | |
input_file = rasterize_vector_image(format_ext, input_file) | |
output_file = os.path.join(templates_folder, f"remove_background_manual_rectangles.{format_ext}.png") | |
print(f"Processing {format_ext}") | |
with as_of(Image.load(input_file), RasterImage) as image: | |
obj_init3 = AutoMaskingArgs() | |
obj_init3.objects_rectangles = [Rectangle(87, 47, 123, 308), Rectangle(180, 24, 126, 224)] | |
obj_init4 = PngOptions() | |
obj_init4.color_type = PngColorType.TRUECOLOR_WITH_ALPHA | |
obj_init4.source = FileCreateSource(output_file, False) | |
obj_init5 = AutoMaskingGraphCutOptions() | |
obj_init5.feathering_radius = 2 | |
obj_init5.method = SegmentationMethod.GRAPH_CUT | |
obj_init5.args = obj_init3 | |
obj_init5.export_options = obj_init4 | |
masking_options = obj_init5 | |
with ImageMasking(image).create_session(masking_options) as masking_session: | |
# first run of segmentation | |
with masking_session.decompose() as _: | |
pass | |
args_with_user_markers = AutoMaskingArgs() | |
obj_init_list = [ | |
# background markers | |
None, | |
# foreground markers | |
UserMarker() | |
# boy's head | |
.add_point(218, 48, 10) | |
# girl's head | |
.add_point(399, 66, 10) | |
# girs's body | |
.add_point(158, 141, 10) | |
.add_point(158, 209, 20) | |
.add_point(115, 225, 5) | |
.get_points()] | |
args_with_user_markers.objects_points = obj_init_list | |
with masking_session.improve_decomposition(args_with_user_markers) as masking_result: | |
with masking_result[1].get_image() as result_image: | |
result_image.save() | |
if delete_output: | |
os.remove(output_file) | |
# Remove rasterized vector image | |
if is_vector_format and delete_output: | |
os.remove(input_file) | |
def remove_background_auto_processing_with_assumed_objects(): | |
raster_formats = [ | |
"jpg", | |
"png", | |
"bmp", | |
"apng", | |
"dicom", | |
"jp2", | |
"j2k", | |
"tga", | |
"webp", | |
"tif", | |
"gif"] | |
vector_formats = [ | |
"svg", | |
"otg", | |
"odg", | |
"eps", | |
"wmf", | |
"emf", | |
"wmz", | |
"emz", | |
"cmx", | |
"cdr"] | |
all_formats = [] | |
all_formats.extend(raster_formats) | |
all_formats.extend(vector_formats) | |
for format_ext in all_formats: | |
input_file = os.path.join(templates_folder, f"couple.{format_ext}") | |
if not os.path.exists(input_file): | |
continue | |
is_vector_format = format_ext in vector_formats | |
# Need to rasterize vector formats before background remove | |
if is_vector_format: | |
input_file = rasterize_vector_image(format_ext, input_file) | |
output_file = os.path.join(templates_folder, | |
f"remove_background_auto_assumed_objects.{format_ext}.png") | |
print(f"Processing {format_ext}") | |
with as_of(Image.load(input_file), RasterImage) as image: | |
obj_init9 = list() | |
obj_init9.append(AssumedObjectData(DetectedObjectType.HUMAN, Rectangle(87, 47, 123, 308))) | |
obj_init9.append(AssumedObjectData(DetectedObjectType.HUMAN, Rectangle(180, 24, 126, 224))) | |
obj_init10 = PngOptions() | |
obj_init10.color_type = PngColorType.TRUECOLOR_WITH_ALPHA | |
obj_init10.source = FileCreateSource(output_file, False) | |
obj_init11 = AutoMaskingGraphCutOptions() | |
obj_init11.assumed_objects = obj_init9 | |
obj_init11.calculate_default_strokes = True | |
obj_init11.feathering_radius = 1 | |
obj_init11.method = SegmentationMethod.GRAPH_CUT | |
obj_init11.export_options = obj_init10 | |
obj_init11.background_replacement_color = Color.green | |
masking_options = obj_init11 | |
with ImageMasking(image).decompose(masking_options) as masking_result: | |
with masking_result[1].get_image() as result_image: | |
result_image.save() | |
# Remove rasterized vector image | |
if is_vector_format and delete_output: | |
os.remove(input_file) | |
if delete_output: | |
os.remove(output_file) | |
def remove_background_auto_processing(): | |
raster_formats = [ | |
"jpg", | |
"png", | |
"bmp", | |
"apng", | |
"dicom", | |
"jp2", | |
"j2k", | |
"tga", | |
"webp", | |
"tif", | |
"gif"] | |
vector_formats = [ | |
"svg", | |
"otg", | |
"odg", | |
"eps", | |
"wmf", | |
"emf", | |
"wmz", | |
"emz", | |
"cmx", | |
"cdr"] | |
all_formats: list = [] | |
all_formats.extend(raster_formats) | |
all_formats.extend(vector_formats) | |
for format_ext in all_formats: | |
input_file = os.path.join(templates_folder, f"couple.{format_ext}") | |
if not os.path.exists(input_file): | |
continue | |
is_vector_format = format_ext in vector_formats | |
# Need to rasterize vector formats before background remove | |
if is_vector_format: | |
input_file = rasterize_vector_image(format_ext, input_file) | |
output_file = os.path.join(templates_folder, f"remove_background_auto.{format_ext}.png") | |
print(f"Processing {format_ext}") | |
with as_of(Image.load(input_file), RasterImage) as image: | |
obj_init14 = PngOptions() | |
obj_init14.color_type = PngColorType.TRUECOLOR_WITH_ALPHA | |
obj_init14.source = FileCreateSource(output_file, False) | |
obj_init15 = AutoMaskingGraphCutOptions() | |
obj_init15.feathering_radius = 1 | |
obj_init15.method = SegmentationMethod.GRAPH_CUT | |
obj_init15.export_options = obj_init14 | |
obj_init15.background_replacement_color = Color.green | |
masking_options = obj_init15 | |
with ImageMasking(image).decompose(masking_options) as masking_result: | |
with masking_result[1].get_image() as result_image: | |
result_image.save() | |
# Remove rasterized vector image | |
if is_vector_format and delete_output: | |
os.remove(input_file) | |
if delete_output: | |
os.remove(output_file) | |
def remove_background_generic_example(): | |
raster_formats = [ | |
"jpg", | |
"png", | |
"bmp", | |
"apng", | |
"dicom", | |
"jp2", | |
"j2k", | |
"tga", | |
"webp", | |
"tif", | |
"gif"] | |
vector_formats = [ | |
"svg", | |
"otg", | |
"odg", | |
"wmf", | |
"emf", | |
"wmz", | |
"emz", | |
"cmx", | |
"cdr"] | |
all_formats: list = [] | |
all_formats.extend(raster_formats) | |
all_formats.extend(vector_formats) | |
for format_ext in all_formats: | |
input_file = os.path.join(templates_folder, f"couple.{format_ext}") | |
if not os.path.exists(input_file): | |
continue | |
is_vector_format: bool = format_ext in vector_formats | |
# Need to rasterize vector formats before background remove | |
if is_vector_format: | |
input_file = rasterize_vector_image(format_ext, input_file) | |
output_file = os.path.join(templates_folder, f"remove_background.{format_ext}.png") | |
print(f"Processing {format_ext}") | |
with as_of(Image.load(input_file), RasterImage) as image: | |
obj_init18 = PngOptions() | |
obj_init18.color_type = PngColorType.TRUECOLOR_WITH_ALPHA | |
obj_init18.source = FileCreateSource(output_file, False) | |
obj_init19 = AutoMaskingGraphCutOptions() | |
obj_init19.calculate_default_strokes = True | |
obj_init19.feathering_radius = 1 | |
obj_init19.method = SegmentationMethod.GRAPH_CUT | |
obj_init19.export_options = obj_init18 | |
obj_init19.background_replacement_color = Color.green | |
masking_options = obj_init19 | |
with ImageMasking(image).decompose(masking_options) as masking_result: | |
with masking_result[1].get_image() as result_image: | |
result_image.save() | |
# Remove rasterized vector image | |
if is_vector_format and delete_output: | |
os.remove(input_file) | |
if delete_output: | |
os.remove(output_file) | |
def rasterize_vector_image(format_ext, input_file): | |
output_file: str = os.path.join(templates_folder, f"rasterized.{format_ext}.png") | |
with Image.load(input_file) as image: | |
image.save(output_file, PngOptions()) | |
return output_file | |
class UserMarker: | |
def __init__(self): | |
self._list: list = [] | |
def add_point(self, left, top, radius): | |
for y in range(top - radius, top + radius + 1): | |
for x in range(left - radius, left + radius + 1): | |
self._list.append(Point(x, y)) | |
return self | |
def get_points(self): | |
return self._list | |
# Run examples | |
remove_background_auto_processing_with_assumed_objects() | |
remove_background_processing_with_manual_rectangles() | |
remove_background_auto_processing() | |
remove_background_generic_example() |
关于 Python API 的 Aspose.Imaging
Aspose.Imaging API 是一种图像处理解决方案,用于在应用程序中创建、修改、绘制或转换图像(照片)。它提供:跨平台的图像处理,包括但不限于各种图像格式之间的转换(包括统一的多页或多帧图像处理)、绘图等修改、使用图形基元、转换(调整大小、裁剪、翻转和旋转) 、二值化、灰度、调整)、高级图像处理功能(过滤、抖动、遮罩、去偏斜)和内存优化策略。它是一个独立的库,不依赖任何软件进行图像操作。可以在项目中使用原生 API 轻松添加高性能图像转换功能。这些是 100% 私有的本地 API,图像在您的服务器上处理。通过在线应用更改 ODG 中的背景
通过访问我们的 Live Demos 网站 更改 ODG 文档的背景。 现场演示有以下好处
ODG 什么是 ODG 文件格式
Apache OpenOffice 的 Draw 应用程序使用 ODG 文件格式将绘图元素存储为矢量图像。它遵循结构信息标准推进 (OASIS) 概述的基于 XML 的文件格式规范。 ODG 将绘图表示为使用点、线和曲线的矢量图像。除了 OpenOffice,LibreOffice 和其他应用程序还提供对 ODG 文件格式的支持。例如,OpenOffice 支持的其他格式包括 ODT、ODF、ODP 和 ODS。
阅读更多其他支持的更改背景格式
使用 Python,可以轻松更改不同格式的背景,包括。