Readable Image Formats
Answered
I do a good amount of Astronomy image processing. The native from camera format is .fit. I process my data in a program named Pix Insight and use its format of .XISF. When I'm happy with the image I save in a number of formats including .jpg and .tiff but most times ON1 doesn't read these images. I'm missing something basic but unsure of what. What are the requirements forON1 to read these files? I save the JPG & TIFF files as 16 bit.
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"but most times ON1 doesn't read these images."
What - exactly - happens when you try? Do the files appear in the browser?
And "most times": what's different about the files that Photo RAW does read?
"What are the requirements for ON1 to read these files?"
Nothing special - are you saving your tiffs in some non-standard format? Maybe using a non-standard compression method?
I notice that a tif saved using "jpeg" compression opens black in Photo RAW:
Note that there's no such thing as a 16 bit jpeg, incidentally - which brings me back to the "are you doing something odd with your files?" question...
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You wouldn't be saving as greyscale would you? Photo Raw won't read those.
The supported file types are shown here...
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Yep, greyscale is one of the variations from the norm I was thinking about, along with CMYK and LAB colour spaces:
"(we DO NOT SUPPORT images in Grayscale, CMYK or LAB color modes)"
Still not sure what might happen to a jpeg to make it unreadable, though...
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jpegs can become corrupt and unreadable. There are also different jpeg formats some of which are badly implemented that can cause problems. There is a free program called Bad Peggy that will scan them and report inconsistencies or corruption. It's rare but I've had it happen and BadPiggy found them for me.
It's from github but you don't have to build it yourself. You can download the application for your OS as well.
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Oh yeah, I know that any file can become damaged, but I get the sense that Steven is doing something that makes - some, not all - of his files unreadable.
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Keith,
I've tried to respond with screen captures made with the Snipping Tool but I get a message that says no images of over 2MB and limited to jpeg, gif, or png . All of the screen captures are .jpg and less than 2 mb. I'm signed in.
The 16 bit jpeg was an error, that was the tiff files.
I have screen captures but they are useless if I can't post those.
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The comment about some do and some don't are images all saved using the same procedure. The TIFF files are always 16 bit and can be opened in Photoshop without issue. My version of PS is 12. and these files open without issue.
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But as I said before some will show in ON1 and others don't. When I browse to the folder where these images are I see the names and extension but there are no thumbnail images and if I attempt to open I get a square with a silhouette of a head with a slanted line through it.
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How about posting one of your problem files to a sharing site, such as dropbox or we transfer and then posting the download link here for us to take a look at.
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Seems I have attachments working, singed in on two machines.
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This is a successful tiff image I can work on where most I try and get no image in either the screen when browsing.
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Post one of the .tiff files you are having trouble opening to a file sharing site like Dropbox or WeTransfer then post the download link here so we can see the actual file. There is something about them that Photo RAW does not like which is why you get the "can't do that" icon when you try to open them in the editor. Until we can see the actual data we can only guess at possibilities.
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Those files are all in the Grayscale color space. It does not matter how many bits they contain per pixel, it is the actual color space that matters. When I first tried to view them I got the "no no no" diagonal icon too. I have an AppleScript Service I've written which will take any image file it is given and set its colorspace to AdobeRGB. I work with a lot of B&W images so it comes in quite handy. After feeding your photos to it I am able to view them in the Browser and open them in the Editor.
You need to use some other program to change their colorspace from Grayscale to one of the RGB spaces.
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I won't swear to it but I suspect I've used PS CS5 and tried saving as jpg from there as well but I'll try again. It also seems I've had this issue with color LRGB images. I can't say when as I normally do my processing in Pix Insight and then bring into PS CS5 for "other" enhancements and was trying the same with ON1, especially the noise reduction.
I have saved from PS CS5 and had problems opening yet. Some do, some don't and with PS CS5 I always save as 16bit tiff.
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Once again, the file format, and the pixel bit depth do not matter. What matters is the color space and that Hass to be an RGB color space or Photo RAW will not work with it.
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For instance here's a combined image in luminace only and being saved as a TIFF in PS CS5. What options should be used to be able to open in ON1?
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Turn on the Embed Color Profile option. If it won't turn on, you'll first have to assign one to the image. It's been a long time since I've used Photoshop but I believe the commands for managing the colorspace (profile) are in the Edit menu.
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Thanks I'll give that a go soon. I'm working on two different telescope systems at the moment, likely a good while.
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I can't say for certain but it seems the software that produces the tiffs does not embed any color profile to the image files.
An image can have a profile assigned to it or not. That profile defines the range of color values allowed — its gamut or colorspace. sRGB has a smaller space (fewer colors) than Adobe RGB which is smaller than ProPhoto and so on.
Photoshop allows you to apply a colorspace to an image which has none or to convert from one space to another. Information about that colorspace can then be added to the image file with the color profile. That is what the greyed out option is for. It is most likely grey because the image does not have any profile assigned to it yet.
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Brian I did look into this and found that if I change the mono image in the Mode settings from mono to rgb it allows me to enable it otherwise not.
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I'll look into Pix Insight to see if they have a similar setting. That may have to wait a while though. I've got CCD cameras and filters to tend to. Thanks for the assist. It seems I'm headed in the right direction. I'll let you know what I find out.
Thanks again for you time and assistance.
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Yes, exactly, that is the menu command I was trying to remember. It's been several years (like Mac G5 years ago) since I've used Photoshop.
Glad I could help. I've always wanted to get more into astrophotography. I work on some of the images from the Juno spacecraft for fun.
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I'm but an amateur with some equipment and about 25 years of fooling around in this hobby. Many changes not only to equipment but programs as well. My website is astral-imaging.com. Not as up to date as it should be but between the telescopes at home and a friends system in California (SRO) 24" telescope with a new CMOS (AC4040BSI) camera soon to be mounted, it keeps me busy.
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