Hello,
Some questions on save options, if you don’t mind please?
Property BitsPerPixel is ReadOnly, so how to set the big depth of saved images, ie 16-bits vs 24-bits vs 32-bits vs 48-bits vs 64-bits
How to set the DPI when saving?
And is there any Boolean property to enable/disable these 3 when saving?
Grayscale - Anti Aliasing - High Quality Rendering Mode
Thanks 
@australian.dev.nerds , derived from ImageOptionsBase classes are used for specifying bitsPerPixel property for image export. For example take a look at:
https://reference.aspose.com/imaging/net/aspose.imaging/imageoptionsbase/
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/pngoptions/
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/bmpoptions/
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/tiffoptions/
As for Anti Aliasing and High Quality Rendering Mode options control you should set ImageOptionsBase.VectorRasterizationOptions for Vector format images:
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/vectorrasterizationoptions/
or Graphics class properties for Rasters:
https://reference.aspose.com/imaging/net/aspose.imaging/graphics/
Hello and thanks, however, the docs won’t specify valid values for BitDepth properties of:
png:
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/pngoptions/bitdepth/
bmp:
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/bmpoptions/bitsperpixel/
tiff:
https://reference.aspose.com/imaging/net/aspose.imaging.imageoptions/tiffoptions/bitsperpixel/
And I didn’t find the b/w or grayscale property for:
TiffOptions / TgaOptions / GifOptions / BmpOptions / Jpeg2000Options
Do they have a boolean property for grayscale saving?
Thanks
@australian.dev.nerds ,
use PngOptions.ColorType property to set BitsPerPixel (TruecolorWithAlpha = 32, Truecolor = 24, other are 1 - 8). By the way, one of upcoming releases is going to contain updated PngOptions class with more informative code docs.
As for TIFF, this format uses more advanced options. Take a look here, consider TiffOptions(TiffExpectedFormat) ctor and BitsPerSample property: Manipulating TIFF Images|Documentation
You are getting grayscale export image due to using TiffOptions ctor with TiffExpectedFormat.Default resulting a BW. Try using new TiffOptions(TiffExpectedFormat.Jpeg) to keep color, take a look at code reference.
This thing with ‘Grayscale’ is about using default TiffOptions, other formats preserve colors by default or can be configured to export a grayscale. Please take a look at the different image options specs. You could also take a look at Grayscale | Aspose.Imaging for .NET API Reference.
Thanks a lot, so if I understand you correctly, for:
TgaOptions / GifOptions / BmpOptions / Jpeg2000Options
There’s no direct grayscale property, and I will have to try cast to image to RasterImage, set Grayscale and then save?
If true, how do you think about registering a feature request ticket for:
TgaOptions / GifOptions / BmpOptions / Jpeg2000Options
direct grayscale boolean property, so won’t need additional rasterimage cast, like other formats?
Best.
@australian.dev.nerds , you should explore specs of different options:
Thanks,
yep, I wonder why JpegOptions has but Jpeg2000Options does not have .ColorType
They’re similar formats though…
@australian.dev.nerds , JPEG and JP2000 are not the same formats, but the thing is that our Jpeg2000Image currently supports only RGB colorspace (24-bpp) on save/export.
A dcm file which is 87.5 mb and saved by Photoshop when loaded into Aspose to be saved as jpeg, will not succeed:
Aspose.Imaging.CoreExceptions.ImageSaveException
Image saving failed.
Smaller files saved by the same Photoshop will be loaded, a known issue?
Same thing happens when saving as Tga:
Aspose.Imaging.CoreExceptions.ImageSaveException
Image saving failed.
If load a dng to be saved as jpg, a black border line is painted in the left and top of result image! Also known?
Thanks
@australian.dev.nerds , would you mind to share the code examples and the files you are using that raise exceptions? So we can test it out.
Hello,
Seems if images are a little large such errors will happen, please be so kind and check these 2 error in a project which seem to be bugs:
@australian.dev.nerds
We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.
Issue ID(s): IMAGINGNET-6729,IMAGINGNET-6730
You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.
Hello, any idea about the above 2 issues?
The issues you have found earlier (filed as IMAGINGNET-6730) have been fixed in this update. This message was posted using Bugs notification tool by samer.el-khatib
Hello
Just checking if IMAGINGNET-6729 is fixed yet?
Since it was a major issue.
Anyway, when loading different image formats and saving them as Pdf, which PdfCoreOptions.Compression is recommended to use?
Since the resulting Pdf will be made from image only, no processing on my side at all, just pure converting.
So 3 ways:
Set PdfImageCompressionOptions to Auto for all image formats.
Set PdfImageCompressionOptions to something else (fixed) for all image formats.
Set PdfImageCompressionOptions to different enums based on the source format.
What’s recommended?
@australian.dev.nerds , a recommended way of using PdfImageCompressionOptions is set a specific value based on the requirements to the output PDF. Please take a look at Enum PdfImageCompressionOptions | Aspose.Imaging for .NET API Reference with documentaion of each defined value.
Hello
When saving as Pdf, is some sort of book fold option available?
Something like:
@australian.dev.nerds , Aspose.Imaging does not provide such functionality. As long as there is Imaging to PDF adapter you can post your question to Aspose.PDF forum support, so they can guide you through the product capabilities.