Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

导出Separation色彩空间的jpg图片是黑色的 #242

Open
Charltsing opened this issue Oct 17, 2024 · 2 comments
Open

导出Separation色彩空间的jpg图片是黑色的 #242

Charltsing opened this issue Oct 17, 2024 · 2 comments
Labels
取图 提取图片 缺陷 Something isn't working

Comments

@Charltsing
Copy link

Charltsing commented Oct 17, 2024

test.zip

虽然Separation色彩空间很少见,但偶尔还是能遇到。

不知道能不能直接导出为正确的颜色,简单的反相可能不是最好的做法。

色彩空间主题包括设备相关(Device-Dependent)的色彩空间、设备无关(Device-Independent)的色彩空间及特殊色彩空间等资源对象。设备相关的色彩空间包括DeviceGray、DeviceRGB和DeviceCMYK三种,设备无关的色彩空间包括CalGray、CalRGB和Lab三种,特殊色彩空间包括Separation(专色)、Indexed(颜色索引表)和Pattern(底纹)三种。页面上的所有着色操作均与色彩空间相关,任何一种颜色都是由某一色彩空间及相应空间下的颜色值共同来表示的。各个色彩空间下的颜色值可以相互转换。

@wmjordan wmjordan added 缺陷 Something isn't working 取图 提取图片 labels Oct 17, 2024
@Charltsing
Copy link
Author

通过网盘分享的文件:PdfWithSeveralSeparationImages20230308.zip
链接: https://pan.baidu.com/s/1rSqwTRdsMCAqRG6jc7XrNw?pwd=bcq8 提取码: bcq8

这有个老外从3万个pdf里面提取的若干页面,都是Separation色彩空间,供你测试用。

文件太大,240兆,我只能放百度盘了。

@wmjordan
Copy link
Owner

等有时间再看怎样搞。

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
取图 提取图片 缺陷 Something isn't working
Projects
None yet
Development

No branches or pull requests

3 participants
@wmjordan @Charltsing and others