TIF Compression

[GenuineRex]

I am opening a TIF file with new MagickImage(""); and then setting the compression to CompressionMethod.JPEG and saving as a TIF.

The resulting TIF file is 3-4x larger than the original which I believe has the same type of compression.

Is there something else I need to set to get better compression?

Thanks in advance!
Rex

[GenuineRex]

I was able to get close with tif.Quality = 11;

I am trying to write a watermark on a TIF file that I did not create and write out the same characteristics of the TIF I read.

Are there any other settings I should consider?

Rex

[dlemstra]

Can you share your input image and the watermark?

[GenuineRex]

Unfortunately the image has sensitive data. Hard to even create a sample with similar qualities because these are customer-generated on their scanner.

What are the properties to consider when trying to achieve similar quality and compression to an original file?

tif.PreserveFileSettings() would be a handy function. I am pulling the TIF in from a ZIP file stream into a memory stream and a FileCollection. Then I iterate each file to watermark and set compression and Quality. I don't really want to change the compression and quality but because I am needing to modify and then save the TIF I must.

[dlemstra]

The primary setting is image.Settings.Compression. And this is how it works for the tiff coder:

When you set image.Settings.Compression that will be used. Otherwise when the Compression of the image is not jpeg that will be used. The quality setting is only used when jpeg or zip compression is used, but you will need to explicitly set it in the image.Settings.