Saving final image for online display and resizing the image

jeffrey merrill

Hi:

Once the image processing steps are complete, I'm wondering what is the correct method of preparing the image for display (usually online).  I would be curious Adam to learn what steps you take in preparation for displaying the finalized image. 

I've used dynamic crop to change the borders of the image without changing the image scale, and I've saved the image in TIFF and JPG formats.

But I'm lost in how to actually resize the image..for instance if I have a small galaxy in center of a large open star field and I want to zoom in a bit on the galaxy, as opposed to just cropping away borders, for which the galaxy still remains small?  I've read about resample but the documentation is so confusing and I'm just not getting it to work primarily because I don't understand the tool's features.

...then there's "ICC Profile" etc ...do you have any advice?  would you consider a video lesson addressing the preparation of images for final display?

jeff

BlockHead

Hi Jeff,

I definitely do not have any good advice on the color spaces and all of that. I just go with the default settings when generating TIFFs or JPEGS. My "technique" is to have an good monitor- but deliver an "average" image that looks reasonable across a large set of devices. For example when I post an image...I look at the page with my phone as well as two monitors. There are differences..but as long as there isn't a trend that all devices share that I do not like (a green bias or something)... then I am happy.

Resample is in indeed the PixInsight way to resize an image. 

I am pretty sure I have demonstrated its usage along the way- but I do not think there is a section on in.

For a given number of pixels in your image- just change the width and height setting (likely you want to keep the aspect ratio). The interpolation method determines the sharpness or smoothness of the enlarged version. The default Lancsoz method is the default through PI...so likely you are used to it. 

You can change any of the boxes, width/height, or percentage or linear dimensions... they are all analogous (and change accordingly). 

-the Blockhead