Photoshop :: Indexed Color Images - File Size
Feb 11, 2005
why the size on disk of uncompressed indexed color images is always slightly larger than you expect it to be? For example, a 100x100 pixel image, 4 bit indexed image with a 2 color palette: the file size should be 5,000 bytes (4 bits for each of 10,000 pixels) plus 6 extra for the two colors in the CLUT - i.e. 5006 bytes. Yet the actual size is 5,268 - not a figure that squares with any size of palette! Ditto a 200x200 image, 8 bit colour: 40,000 bytes. Plus a full 256 colour CLUT at 3 bytes each, an extra 768. total size 40,768. on disk it is 41,080 bytes - an extra 112 bytes.
This is on a PC - not a Mac 'resource fork' issue. Is there some additional header info that Photoshop attaches to indexed color images -
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Jun 22, 2009
The color swatches in the 64-bit version of Photoshop CS4 do not change to the used swatches for the indexed image, rather they show the default colors for Photoshop. I looked to see if there was a setting to show the colors in use, but alas there is none. Is this a feature or a bug?
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May 8, 2013
I designed a UI for a small screen device. The assets need to be exported now, with 256Â and also 1024 indexed colours.I have never heard about 1024 color pallete. How can I do it?
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Jun 13, 2013
I was quite surprised this image I found was an indexed color profile... when I was new (and dumb) to Gimp and images in general I used to save transparent gifs rather than transparent pngs... because I didn't know PNGs could be transparent but Gimp would warn me about that it would convert to indexed and I'd lose A LOT of color & clarity... none of my indexed images were very clear nor this colorful... how is it possible to obtain such color and clarity in an indexed color profile like in the image attached?
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Aug 23, 2013
I have been having a problem with Gimp. I am currently working on a Gif banner for a webpage. The banner itself is 728x90 pixels. It has 186 different layes as well, some of which are inside of folders. The xcf itself is complete, but the only other stage I need to complete is converting it to Indexed colors so I can export it as a gif; however, whenever i access the Image>Mode tab, the "Indexed" button isn't highlighted, and I am unable to click on it, even with the keyboard commands. I haven't been able to find a solution so far. Here's a picture of the problem.
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May 17, 2012
I have a great picture of Jet Jaguar. I'm interested in pixel art, so I reduced the colors to an indexed 16 colors.
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I want to save the 16 colors in this pic to a palette for later, but how? I've been looking in vain through the menus for a way to save this color map as a palette. Maybe there's a script or plugin somewhere, but it is hard for me to believe there isn't a built-in way to do this.
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Apr 12, 2011
I am trying to optimize some images for web to have a smaller file size. I am using "Save for Web" feature, and every time I try to save a file, the actual file output size is a lot bigger than the size it shows on the "Save for Web" dialog.
For example, I have a 607 bytes .gif, when I open "Save for Web" it shows 207 bytes for 16-colors but when I save it the output file is 1.22 kb.
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Nov 10, 2012
I am making a holiday greeting card. I have 16 very larged photo images "linked" (not embedded) into the card. The original images are very large (e.g. 4500 x 3000 px, 10mb) but I've placed them fairly small in the final card (only about 2" x 2" printed). Therefore, I likely don't need the full resolution of the original photos. I need to generate a final file that I can send to an online print shop, something that is ideally 10-25Mb in size, probably pdf. How to prepare the final file for export to pdf to generate as such? Right now, the final file is 275Mb because it is embedding the full size of each of the 16 images.
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I'm on Illustrator CS6 on Mac.
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Mar 31, 2013
I'm using Illustrator to crop and arrange a number of raster images. However, I'm starting to have file management problems, because the Illustrator files quickly balloon in size.
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Example: I got public domain jpg image of a deer off the Wikimedia Commons. This jpg image is 0.35MB. I opened up a new Illustrator document, placed and embedded the image, and saved the document (with the 'pdf compatible box' unchecked). The resulting Illustrator file is 7.7MB in size, over 20 times the size of the embedded jpg image.
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I've looked around these forum, but other than the 'pdf compatible box', I couldn't find any good solutions. Is there some other option or preference that I could tweak? I need to use embedded images rather than links, but the files are getting out of control (>100MB).
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The screen capture at the end of this post shows the situation. In the top folder in the screencapture, the image file is highlighted, so you can see the filesize. In the lower folder in the screencapture, the Illustrator file is highlighted, so you can see it's filesize. Then you can see the open Illustrator document on the right. (edit: the forum software is no longer allowing me to add images, so I've put the screencapture on Google Drive here: [URL]
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The .ai file with the embedded image is here: [URL]
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I'm using Illustrator CS6 64-bit, v16.0.3 on Windows 8-64.
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Jun 27, 2013
I love LRs ability to create great watermarks. Only thing, they seem to come out (from DNGs) at about 3 mb apiece (quality setting at 79)Â - super large. So I clicked the box to limit file size, and I chose 300k (for web), and it says "could not create a jpeg that met your limit".
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Aug 16, 2002
how can i create my own Indexed Colors using specified colors in Swatches pallete? I can't save a group of colors for index.
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Aug 19, 2004
I am having trouble with the Color Table in Photoshop. Basically I have an indexed PNG-8 file with 8 colors, and I want to export it's palette to a .ACT or .PAL file.
But when I go to "Save..." in Image/Mode/Color Table, Photoshop seems to be filling up the rest of the palette all the way to 256 colors, with shades of gray... instead of ONLY the 8 colors I have in my PNG (including transparency).
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Oct 21, 2013
I installed Photoshop Elements 10 on my new iMac (previously installed on my older imac). After installing the software and launching the organizer, it asked me to index my photos. Custom reindexing 11000 plus photos is not a pleasant thought. How do I find my old index, either on my new mac or on my time machine backup?
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Jan 4, 2004
I am in the process of completing my Photographic website and need to make thumbnail and larger sizes for the the site. The site will have approximately 100 images on it. Clicking the thumbnails will connect to the larger images. How do I make both sizes in PS CS? Perhaps their is a generator that you would recommend for Mac 10.2?
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Apr 15, 2008
is there a function in photoshop cs3 that will reduce the file size of a photo without affecting the physical size of it, i know macromedia fireworks can but thats no help to me unfortunately...
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Feb 20, 2012
I need to convert color images of vehicles to monotone images. When done correctly they will look like the car has been primed in preparation for painting.
Conversion to gray scale does not do the trick.
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Aug 3, 2011
I'm creating a little icon to be used on another site (entering a contest), and they mentioned something about needing to be "indexed .pngs" to be compatible with recolors and palettes.
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Jul 13, 2012
I created a new palette in gimp using my original RGB image (containing shades of yellow and black) which gave me about ~200 colors (with interval=2 in Import dialog). Then I changed the mode from RGB to Indexed using the palette I created above, but the resulting image contains only 2 colors - black and yellow. All the dark-greys, light-greys and different yellows are absent.
I want my indexed image to resemble the RGB as much as possible but the result looks disastrous.
Visual illustration of my problem : [URL].......
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Oct 24, 2013
Why is the image on the screen small the the actual file size. As an example I have an image thats 5.7x5.7 @72DPI. My canvas says 100% but the image on screen is about 3x3.
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May 14, 2003
Can someone please explain to me about file sizes and image dimensions. I have to put together a collage which is 165mm high by 258mm wide. If I click file new and choose default resolution (72) then the file size is ok, if I type in 300 dpi the image becomes huge.
If i chosse 300 dpi then the images I was going to use seem tiny on such a vast workspace - Im confused why does the canvas become so large when changing resolution?
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Apr 10, 2013
I have a solid red image and I want to change that red to an exact red hex code I have. Is there a way to change this color without affecting the quality of the image? I thought this would be really easy, but everything I've found online doesn't give me the color I want, or It doesn't allow me to be 100% accurate.
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Nov 25, 2013
i just started using gimp on ubuntu 13.10 . almost half of the menu items are greyed out. most of the filters work or ar not greyed out, g'mic is greyed out and so is most of the stuff in the file menu (export, save, save as, etc.) . i already tried re-installing gimp from the software center with no prevail. this is how it was the first time i installed it on this new ubuntu 13.10 .
is there something that i can do to maybe refresh the entire gimp folder maybe? maybe delete it then re-install gimp. i really dont know if this would fix anything though.
this is really irritating. and no its not the "image RGB/indexed mode" problem.
im pretty sure i dont have anything installed (like some weird ubuntu restricted access fake file) that could interfere with the interface at all as this is a pretty fresh installation. the most i have installed that might even be close to interfering with the interface is "pipelight" which is for flash and silverlight, not gimp.
i even tried different color profiles and none of them work. i even downloaded the brand new color profiles from adobe. none of those work either.
the only way i got ALL of the menu options back, including g'mic, was opening gimp through raw therapee (basically adobe lightroom for ubuntu) which might be of some use in finding an answer to this?
i already have everything i need installed including the ubuntu restricted access extras and such.i just would like gimp to open normally with all the normal file menu options enabled like everyone elses and not be all greyed out ..
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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 17, 2012
Using ObjectARX2013, I have to solve problems.
When I plot PNG or JPG file, its paper size is needed to edit according to drawing size.
I want to know the source code or function(or method) - C#.
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Dec 6, 2013
My picture’s original size was 108.2 MB in tiff. After I developed my photo in Lightroom and exported the new image, the file decrease to 50MB in tiff. Why did Lightroom decrease the file size to more than half the original size? Is there a way to increase the exportation file size to that I may develop a large size print?
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Oct 18, 2013
Background info:
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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.
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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 keptÂ
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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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Mar 4, 2013
How can in retain my original jpg file sizes when processing multiple file in 11 using expert mode.Â
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Dec 4, 2012
Error message in the opening of Photoshop CS6. " Impossible to synchronize the regulations of color, because the file of parameters of color is untraceable ". Computor with Vista SP2
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Aug 23, 2013
I need to enlarge about 400 pics.
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I know you can resize trough Image processor and the Batch function. However this is only for resize to smaller?
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I need to enlarge without loosing quality. Just like you can do with "nearest neighbour" ...
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Jul 15, 2013
Little disconcerted by the new setup of 'Image/size' menu? Its lost one whole parameter that used to be there by default... Now you have to go find it by click on the drop down and selecting inches.... If I recall it used to show:
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height Pixels
width pixels
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Height inches
width inches
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Overall there appears to be MORE information available and more functions one can exercise than the old format. I guess I'll grow to like it better than the old layout.... but first time out... I missed the old setup.
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Jun 9, 2013
Photoshop is resizing my image and instead of it coming in at about 4" W x 5"H it is coming is at 6" W and 1" H..
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