YCbCr TIFF preview

Help & Support
1

Hi,

I am currently working with photometric tiffs (Jpeg-in-Tiff, using YCbCr compression). My profession is Geographic Information System (GIS).

DOpus is great help in manipulating large number of files (for instance, last project consisted of 11500 tiffs, and DOpus helped me to easily rename them in wished name_format)

However, Dopus preview did not show preview of the TIFF, instead it shows binary content of the tiff. Interesting in small preview tip - picture was shown :slight_smile:

Please see attached example.

So my question is:
Is it possible to preview YCbCr compressed Tiff file in main preview window?

Maybe this link can introduce you to the story:

gdal.org/frmt_gtiff.html

Idea for your marketing and new development: GDAL (Geospatial Data Abstraction Library) is FOSS raster and vector geographic data manipulation engine by OS Geo and if you use it for your previews, DOpus can be of great help to all of us "GIS people", it is quite huge community.

Regards,

Vlatko Roland

aae005b5c2e9928688a2ec2778fa7dc1057da16c.png1441×441 91.8 KB

2

Hi Vlatko,

Could you send us a couple of examples of this type of TIFF file? We might be able to add support for them.

The TIFF format is pretty open-ended & extensible -- you can put just about any type of data inside it -- so we'll never be able to support every possibility, but if a format is widely used and not too much work to support then we should be able to do it.

JPEG-in-TIFF has always seemed odd to me (why not just use JPEG? :slight_smile:) but if it's widely used in certain fields then we could still support it.

The reason the thumbnail works is that it is displaying a separate, low-resolution thumbnail embedded in the TIFF.

Leo