Photoshop :: File / Image Size
Jan 11, 2005
When creating a Photoshop file I understand how to calculate the document size, ie, No of Pixels / Resolution. I also understand that the formula to calculate the number of pixels in a file is size in inches x dpi.
What I'm not sure about is how the number for pixel dimensions which can be viewed at the top of the Image Size window in Photoshop is calculated. For instance if I create a file that is 1500 pixels wide x 900 pixels in height with a resolution of 300 ppi it gives a pixel dimension (file size??)reading of 3.86M.
I had always assumed this was the actual file size! However when I right-click on the file and see the file size it is much smaller.
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Apr 29, 2009
 When I save a file to jpeg the image size in photoshop remains the same as it was as a tiff file BUT according to the information that comes up in windows properties the file is much smaller (300k vs 2.9mg).  Can you advise me which is the correct file size?  If the correct size is the one showing in windows (300K) does mean that the file compressed in JPG and lost a lot of information?
 and if this is the case how can I prevent that from happening and still save the file as a JPG?  [ I would like the image to remain the size photoshop shows it to be] . Thank you very much.
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Oct 18, 2013
Background info:
We got several image files every 2 weeks which should be edited and mainly reduced in size for web purpose. This work needs 1 work day for one man/woman to do, because he/she has to open the file save for web and then set the quality to a value were the file is nearly about 150-200 KB in size.
The images are different, some have few colors, some have a lot of colors and there are also different in resolution. But they should not be reduced in resolution, only in quality. All other specs of the image should be kept
Is there any possible script, plug-in or similar which can do the same (Saving with a specific max. file size) in some automatic and faster way?
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Oct 22, 2012
I see how to resize images by change the pixels or dimensions but is there a way to limit the file size? For example, when submitting images for review some organizations set a limit on the size of the file, i.e, files may be now larger than 5MB. Other than byt trial and error is there a way to set a file size limit?
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Feb 25, 2008
Would someone please explain why a panorama consisting of 27 images totaling 36MB becomes an 800+/-MB file necessitating it be saved as a ".psb," "Photoshop RAW" or .TIFF file?
I would like to open this file on computers that do not have Photoshop CS, CS2, CS3 loaded eliminating the .psb/Photoshop RAW and so far I have only been able to save the image as a corrupted .TIFF file, i.e. does not open properly.
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Dec 27, 2008
I want to reduce the file size of an image
its 23kb and I want it at 10kb or less
I dont care about losing image quality
I'm using photoshop cs4
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Mar 14, 2007
I made a huge mistake when I began my latest design project. I made it too large. Now, I need some help to decrease the size. Even if the quality of the image will get alot worse. The file is huge so I can't use the "Save for web.." option. So, pleae help me. How do I decrease the the image quality and thus the file size?
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Jul 23, 2006
i am having a problem with a file that i made in illustrator cs and then took to photoshop cs and need to make a jpeg 100x100 and 10k, no matter what i do it just will not become small enough and it will not let me edit the dpi, pixil dimensions, and document size independently. if i change one they all change.
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Feb 7, 2009
I'm trying to make an avatar for the forums here, but I can't seem to make it small enough (file size) for it to be usable.
Is there some way I can compress this down to 8kb without losing quality?
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Oct 2, 2012
I've created a mono, bitmapped image approx 400px square. Then saved the file.
If I go to 'get info' (I'm on an Apple Mac), it says the file size is 97k.
If I open the file in P'shop (CS5.5) and go to 'Image Size', it says the file is 19.2k.
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Mar 11, 2012
I have a png image, of 256x128 size. It has 8bits per pixel for color. Now this image's size is 97kB. I open it in photoshop, I save it as different png file, and then... this image is 7kB of size.
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Jun 21, 2006
Why does the image processor increase the filesize of pictures? I'm trying to resize a bunch of jpg's which are between 5-10kb, and when put through the image processor to save as jpg's with a setting of 0 quality, they come out as about 25kb each, even though the dimensions are smaller.
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Aug 21, 2013
How to set image size/resolution when opening a raw file in pse 11 editor? win 7 pro; pse 11 settings: edit>preferences>print resolution = 337.596, screen resolution 109 dpi( 27 inch, dell U 2711). Originally print resoltuion was set to 240 dpi but was changed in case this was causeing a problem. CRAW v 7.4.0.137 Camera alpha 65, image size is: 6000x3376 dpi; (83.33x46.88 inch) Problem is: Currently when I edit a RAW file in CRAW and then open in pse editor image size is: 6000x3376 px; 25x14.667 inches at 240 dpi ( by ration this corresponds to:17.773x10 inch at 337.6 dpi)
I am trying to change settings so the raw file opens as: 17.776x10 and anywhere from240 to 337.6 dpi whatever works or is esiest to set.
My settings are for use in creating blue ray dvd movies and with cropping and editing printing high quality pictures for family.
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Nov 3, 2013
I would like to know what the max image file size is in Organizer? I Have an Epson V600 scanner. I am trying to scan Photos, slides and Neg.s & import the scans into Organizer.
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Feb 26, 2013
How do change the file size on an image? Im trying to put a pic on twitter and it keeps telling me that the image is to big.
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Aug 21, 2013
When converting the colour of a Jpeg to CMYK in Photoshop CS5 the file size is increasing.
The original image is 352KB and after saving as CMYK it is 2.1MB
Why is this happening and how can I stop it?
I'm using a lot of images for a print project so need to keep file sizes small with resolution of 300dpi. The image dimensions are really small, only about 30mm high so they shouldn't be this large a file size
I am using a clipping path but this doesn't seem to be effecting file size (I checked by saving it as RGB with a clipping path which stayed small, and by saving one without a clipping path in CMYK which was huge)
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Mar 2, 2012
I am using Photoshop CS5 with all current updates installed on a Mac running Lion. I am having a problem with the handling of the camera raw format (specifically .arw) and how Photoshop handles the format.
My first issue is that upon loading the format into Photoshop, the program is cropping a bit of the image from both the left and the right. I have not found a way to stop this from happening.
Another issue is file size. A client is having issue with the file size presented. They are providing me an ARW file that is 14.8 MB and I am making edits and provided them with a large jpg from photoshop (jpg qaulity turned all the way up) and they are getting a jpg at 9.7 MB. They are concerned that I am giving them a less than quality result.
I know that any conversion from a camera raw format to a high resolution jpg will result in a lower file size and that has been explained however the client has taken the raw format parsed it through Mac Preview, saved it, and resulted in a larger file size than I could provide in Photoshop.
This then becomes a confusing situation to handle.
Questions:
a) How to explain the lower file size happening in Photoshop to the client (what is lost?)
b) Why they can use mac preview and get a larger file size that I can at full resolution jpg in Photoshop?
c) Is there a way I can make this client happy without moving to a tif file format?
d. Why is Photoshop cropping the .arw file?
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Jul 13, 2013
What is the best way to reduce an image's file size (say by 50%) so that someone with limited RAM can work on the file and then when they are done restore the file back to its 100% size for final output--without sacrificing resolution or pixels. File is a layered psd and will eventually be going to print.
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Feb 15, 2013
I've created an image file in Illustrator and exported it as a .png file. The dimensions are 1000x200 but when I export it the file size changes and becomes bigger. I therefore have to change the file size in Fireworks making sure that the quality is kept as Photoshop does not do it for me. Previously when I exported the files the backgrounds appeared transparent after saving but maybe I've changed a setting by accident that has changed this. I'm selecting the 'Save as' and Flattened png option at 32bit in FW.
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Jan 26, 2006
When i try to create a new document by file->new after i click ok , it automatically opens the "image size" dialog box.
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Jun 16, 2013
I did a Photo shoot for some dancers who need some images for print. How do i save these images so that they are A, print ready pdf's. and B, Email able.
The goal is to get these images onto the page of a paper/magazine. Not full size but i guess they will be a put in a box.
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Aug 18, 2013
I've created a resume in Photoshop CS5 for OS X - I know, I should've used InDesign but I'm more comfortable working in Photoshop.
The PSD is currently 2550x3300 px (8.5x11 in) at 300 dpi. I'd like to save the resume as a PDF flie so I can submit it online. I have no intentions of printing this particular document. Most websites will only accept a file size of under 1MB. What are the ideal settings for saving a PDF in the smallest file size without sacrificing on image quality? I should also note that I do not have Acrobat Pro.
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Sep 18, 2013
Why is the text size in the instructional boxes "File", "Edit", "Image" etc: so small that they are almost unreadable. I know its me, but I can't figure out how to fix it.
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May 24, 2011
I want to create images with minimal file size using .net.
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Mar 7, 2011
How to tell the file size of an image when in corel?
I have some big files that slow the computer down when working on them. Can I some how tell how big a picture is within corel draw.. ie It would be nice to be able to right click on a picture that I have imported into the workspace and it show me how many mega bytes it is.
Then I can go through my files and delete the larger pcs and make them smaller.
As it is now, I have to pretty much delete them all and start again to find dthe few pics that are like 3-5mb in size.
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Jun 2, 2011
I'm currently in the process of organizing my music collection with album art. I found a great site with high quality images[URL] .... and would like to resize pictures to 600x600 within the range of 200-300KB. Is there a way to automatically do this without changing the quality percentage by trial and error?
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Mar 20, 2013
Import .svg file into gimp.. Image size 1024x1024 and smaller produces aliasing.
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Jan 14, 2014
I am trying to export PDFs of drawings with a high resolution image covering almost an entire A1. I realize of course that the file will be very large but it is much larger than I feel it should, and there are also some discrepancies.
The original image is around 100 MB, but only about half is visible in the viewport, so the PDF should be around 50 MB if there is no compression (only negligible amounts of text and lines besides the image), however if I plot it to a PDF using Adobe PDF, setting the resolution to 300 dpi and medium JPEG compression the resulting file is 150 MB. If I choose 72 dpi and low JPEG compression the file looks very bad and compressed but is still around 40 MB in size. This is far too large considering the amount of compression visible in the image, it looks like a 500 KB file tops.
However if I use the DWG to PDF printer instead of the Adobe PDF I can get a very good looking file at around 2,5 MB. Very suitable for printing, but the compression shows if you look up close in the computer (which is a requirement for these files). The odd thing here is that it makes no difference what resolution I set it to, 150 DPI to 1200 DPI creates the same looking file at exactly the same size. I'd like to be able to create a 2,5 MB file to email and a very high quality file for archivation, but not 150 MB large.
Another odd thing is that if I print another file but with the same type of image (a different facade) with 1200 DPI I get a very high quality file of 40 MB, but if I repeat the exact steps and settings for the first file I end up with a 150 MB file. Of course some differences in the image would account for some of this, but not nearly of this magnitude. I deleting everything from the large file and copying in the content from the small file, and successfully printed a 40 MB file again, so there doesn't seem to be some setting or bug in the file I am printing from, rather something in the original file with the image that I have Xref'ed.
How I would go about creating a very high quality file that doesn't bloat up way more than the original image? A 40 MB file is great considering the images are huge, but I can't get this result consistently.
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Apr 4, 2013
I have an image received from a client in .eps format. I need to get it into either a .gif or .jpg format AND the final file MUST be .8 inches x .3 inces, AND no more than 10K in size. How can I save it with these dimensions/constraints and not lose resolution? What I have tried - export to .jpg (file is 5 inches x 3 inches), export and change resolution to 100ppi (image is nearly the right dimensions, but blurry). The tools I have are AI and PS both version CS5
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Mar 5, 2011
I've been using GIMP to make GIFS for a long time now, but recently the "optimize for difference" option I've used is having the reverse effect it should have- ie, it's making the file larger. Here's an example. It's the exact same image, same dimensions, same amount of colors. The first one is unoptimized, each frame is a full picture, and it's file size it ~149kb. The second one is the same as the first, except optimized with about ~50% of the pixels removed from each frame (except the first frame obviously), and yet it's file size is ~155kb. I can not for the life of me figure out why an image with most of it's pixels removed is creating a larger file size. [URL]...
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Nov 29, 2013
how do I make sure the files i export from lightroom to hard drive are the same large files i imported to lightroom from my camera? I have worked on a collection for many hours and following export to hard drive the file sizes are tiny??
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