Poor thumbnail quality when the bitmap is set via Database.ThumbnailBitmap

reuter.philipp — Sun, 04 Sep 2022 15:13:38 GMT

When I set the image with Application.DocumentManager.MdiActiveDocument.Database.ThumbnailBitmap = thumb;, no matter if I load it with bitmap thumb = new Bitmap("C:_size, _size); or with bitmap thumb = _doc.CapturePreviewImage(_size, _size);, the result is always the screenshot:

The .png saved with thumb.Save(imagePath, ImageFormat.Png);:

And the Thumbnail with THUMBSIZE and "_QSAVE" run as command(All 3 have ~1024px as Size):

How to improve the poor thumbnail quality?

Greetings, Philipp

Re: Poor thumbnail quality when the bitmap is set via Database.ThumbnailBitmap

R.Gerritsen4967 — Mon, 05 Sep 2022 08:22:28 GMT

Maybe you can try to change the THUMBSIZE2D system variable.

Default value is 0, but maybe it helps if you change it to 1.

topic Poor thumbnail quality when the bitmap is set via Database.ThumbnailBitmap in .NET Forum

Poor thumbnail quality when the bitmap is set via Database.ThumbnailBitmap

Re: Poor thumbnail quality when the bitmap is set via Database.ThumbnailBitmap