Reprocessing Historical Images - II, Restoring images from antiquated and/or poor quality sources Options

[tedstryk]

I figure that it is time for another thread like this. I still find it astonishing to see the versions of a lot of images that are reproduced over and over again. For example, this is the last mosaic of Triton taken before the close encounter began. The version on the Planetary Photojournal is on the left, my version on the right. Clearly, this image was produced as part of the "instant science" campaign. They did a superb job getting images to the public in a speedy manner, but they are extremely rough, since the team was busy running the spacecraft. However, it is this version that keeps being recycled. Worse, the version on the photojournal is clearly scanned from a printed copy, causing further degradation.



Here is a similar comparison, this time using Proteus (still 1989N-1 on the Planetary Photojournal!).



This discussion started in the thread about Viking crescents but was getting off topic, so I thought I would start a new thread here.

[PDP8E]

Well....it has been about 2 weeks...two weddings, one funeral, one tropical storm, and the start of school again...but I did promise I would take a swing at the Proteus image.


First, my congrats go to Ted and the NASA people who have tried to work with this image. There are only a half dozen or so of actual DNs in the image. I took each DN level and processed it and then merged them. The eastern limb is a WAG ( wild a** guess) but there are faint impressions of a crater in the northwest and an elongated crater, centered in the due west bright area.

Warning: for obvious reasons, this is a highly processed image.....your mileage may vary...

(thanks to Emily for teaching an old angler to fish, and Ted for someone to aspire too!)

[tedstryk]

One thing that I wanted to emphasize. The thing that bothers me about the NASA version is that it is a quick-n-dirty from right after the encounter. There are better versions from the science teams of this and a lot of these images.