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PROGRAMES TO REDUCE FILE SIZE ( IMAGE) TO WORK WITH CN

astrophotography
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#1 DOS BUSSEN

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Posted 06 August 2020 - 01:49 AM

https://www.imgonlin...-image-size.php

 

THIS IS THE SITE I FOUND . WOULD LOVE TO KNOW WHAT OTHER MEMBERS ARE USEING



#2 Tapio

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Posted 06 August 2020 - 02:18 AM

Just about any graphics program can do it.

Also many put bigger images somewehere else (like AstroBin) and then put links here.


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#3 PirateMike

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Posted 06 August 2020 - 05:56 AM

I use Paint Dot Net. It's free and does many other things besides just resizing your images.

 

https://www.getpaint.net/download.html

 

 

Miguel   8-)

 

.


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#4 Alex McConahay

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Posted 06 August 2020 - 08:39 AM

It would seem every one of us use an image processing program to process their images. Every image processing program has a way to "Resample" (it is called in Pixinsight) or Resize an image. In Photoshop, just use "Save For Web," and specify the size and quality you want.

 

The next to the last step in my work flow is to save the file at full resolution, full size, with the name of object, and suffix of "Done" (as in "M13done.xisf"). THEN, I resample to 1080 height, by whatever width is necessary, and "Save as" a JPG with the name of the object and the suffix "web" as in "M13web.jpg." At that point, I am finished. 

 

In Photoshop, I can save the full resolution, all layers (as a TIFF or Photoshop document). Then Use "Save For Web" and do the same thing. 

 

I do not see how somebody needs a different program to do any of this.

 

Alex


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#5 DeanCN

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Posted 06 August 2020 - 09:23 AM

I use gimp: its free and available cross-platform.  3 simple steps to scale up or down any image:

File->Open, Image->Scale Image, File->Save


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#6 stryker66

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Posted 06 August 2020 - 09:54 PM

I dont know why they limit the size even if it is an external link which it does not even store data on the CN servers..



#7 Stelios

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Posted 06 August 2020 - 10:06 PM

I dont know why they limit the size even if it is an external link which it does not even store data on the CN servers..

It has nothing to do with the demand on CN servers. It has to do with members downloading on paid connections and low bandwidth devices. 

 

Anyway, I also use Paint.Net (great program), but by FAR the easiest way if using Windows is to take a snip and save it a a .jpeg. The snip always end up taking VERY little space, even if they are relatively large size images. 


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#8 PirateMike

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Posted 06 August 2020 - 11:15 PM

It has nothing to do with the demand on CN servers. It has to do with members downloading on paid connections and low bandwidth devices. 

 

Anyway, I also use Paint.Net (great program), but by FAR the easiest way if using Windows is to take a snip and save it a a .jpeg. The snip always end up taking VERY little space, even if they are relatively large size images. 

Just hearing the word "Snip" is enough to get me running in the opposite direction!  lol.gif

 

 

Miguel   8-)

 

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#9 stryker66

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Posted 07 August 2020 - 09:51 AM

It has nothing to do with the demand on CN servers. It has to do with members downloading on paid connections and low bandwidth devices. 

 

Anyway, I also use Paint.Net (great program), but by FAR the easiest way if using Windows is to take a snip and save it a a .jpeg. The snip always end up taking VERY little space, even if they are relatively large size images. 

"downloading" will be outside of this site no? Even non members can download it, I am not sure why this is, please explain.



#10 DHEB

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Posted 07 August 2020 - 09:54 AM

ImageMagick

https://imagemagick.org/index.php

Open source & free

#11 garyhawkins

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Posted 20 September 2020 - 03:01 PM

This might be just the tool I'm looking for.  Can I batch convert multiple images in png format to jpg format, achieving a specific quality, while dropping the file size below 500kB for CN?  Thus, trading size to maintain quality.  

 

CS Gary

 

ImageMagick

https://imagemagick.org/index.php

Open source & free



#12 DeanCN

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Posted 20 September 2020 - 07:02 PM

yes. ImageMagick can do "magic" including batch conversion.  If you are comfortable with linux command line and

scripting (bash, php etc.) you can do almost anything with it.  Lots of on-line documentation and examples to show

the way.



#13 BobInTexas

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Posted 21 September 2020 - 08:25 AM

MS Paint if you're on Windows.



#14 iwannabswiss

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Posted 21 September 2020 - 10:00 AM

GImp

Pixlr.com



#15 bobzeq25

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Posted 21 September 2020 - 10:28 AM

I use either PixInsight (for my processed images) or Irfanview.



#16 terry59

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Posted 21 September 2020 - 12:31 PM

Maybe this is complicated but I right click the .jpg file name, select edit, select pixels and adjust. It will update the file size when you save


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