Extracting embedded image at original resolution

Any tips on how to extract an embedded bitmap at its original pre-embedded resolution from an AI file?

Here's another method:
First removing any other elements or clipping paths. Select the image and in the Links pane flyout choose Placement Options and pick File Dimensions. If your image is larger than your artboard, you will have to make your artboard larger than the image.
Then to save your .ai file as a .pdf (Illustrator default = no downsampling or compression). Then open the the file in Acrobat Professional and using the Touch Up image tool to select the image and open it in Photoshop. Then you can "save as" the Photoshop file to whatever format you wish.

Similar Messages

Extract Embedded Images-did you know that-

there is actually a feature in Illustrator to do this even though it is not called Extract Images?
Not only that once you extract the image you can update it as well you do not have to lace it again and reposition it.
When I saw this and realize it was there I could not believe it as it has been asked so many times and there have been numerous work arounds.
The reason I think it has passed everyone by is that it is not located in the links panel.
So to the chase.
Edit>Edit Image
and then
Edit>Update Image
The former opens the embedded image in Photoshop
edit it there and then save it
then back in Illustrator go to the latter and it will be updated.
Never noticed this before.
The only draw back is that it seems to only work on one image at a time.
I wonder how many users here knew about this little feature?

Monika Gause wrote:
rijackson741 wrote:
Copy and paste doesn't retrieve the original image.
Why not?
You will have trouble getting the original resolution in case the image has been scaled in Illustrator.
Yes you're right about that, and it is the best way if you have the original Illustrator file with the embedded image.
In my defense, I'm mostly having to do this sort of thing with PDFs that are sent to me. Most cases I have to change something in the PDF or pull artwork out for another project we are working on. After opening the PDF in Illustrator, we then just copy the image and even paste it straight into an email (Mac) and request the original file. If the original is not to be had, we then paste the image into a new Photoshop file and relink it. If need be, we'll replace it with another image later.
@rijackson --- you most surely can "Relink"... well that's what the button you choose in Illustrator is called... even if the image is embedded. This will place the image in the exact same place and size as the embedded image, thus "linking" it if you checked the Link box when placing.
Also, you can always choose Link Information and see what transformations the image has went through regarding size and rotation. This is also with a native Illustrator file only. The information can be used to calculate what you need to do to the image to revert to it's original size and rotation. Rather unfortunate, because something intuitive like Freehand used to have, like changing the percentage and angle in the Appearance panel was far better and easier to revert images, embedded or linked.
@rijackson --- considering all of the features and functions that Illustrator still does not have or are incomplete... yes, Illustrator as a whole is pathetic as the only pro vector alternative on the market. Not just this one omission, which is easily worked around. That's what I was trying to say to wazi9909.
* I just thought it should be mentioned again, that Monika's correct answer only applies to a native Illustrator file if you have it, AND if you save with PDF Compatibility or as an Illustrator native PDF. With any and all other PDFs saved with a preset like for prepress... the images have been compressed, and will be as we call them "baked". No matter how you copy, paste, export or open, the resolution, size and quality is "finished".

Extracting Embedded Images

I'm hoping there is a very simple solution here, but I haven't found it yet.
I am doing some freelance work and the client sent me several .ai files. They were a mess, and should have been created in InDesign to begin with, so I transferred them over. At the time, I copied and pasted the links, but of course, the images don't show up in the links panel in InDesign. I'm assuming this will be an issue for printing, is that right?
I went to find the original links, and couldn't find them anywhere in the folders I was given. When I looked at the .ai files I was given, I found out that the images were embedded. When I select an image, I cannot choose to "update link" or "edit original." Those options are grayed out.
How do I get those embedded images to InDesign in an appropriate format for printing?

Save the files with PDF compatibility (if they aren't aleady) and then open them in Photoshop. Select the "images" tab and then select all the images you need. They will open in Photoshop unscaled where you can save them

How to extract embedded images from a Pagemaker file

this is using version 6.5
select image.
File > Export > Graphic
set the file type and save

>>says that this export technique does not work, it produces a low res screen version of the file.
Are you certain the original files were any better?
My preferred method of doing this works well, but it takes a few extra steps. I'd make a high-res PDF out of the PM file, then pick apart the PDF to extract the graphics. Are the graphics raster or vector? If they're raster, you can use Acrobat's Touch-up Object tool to open them in Photoshop. If they're vector, you can open the PDF in Illustrator and save out the graphics from there.
HTH

Why can't I double click to open embedded images?

I want to put this topic in the Features request, but I'm putting it here first to check that I've not made a silly mistake.
I'm slowly getting the hang of Illustrator. But it often feels like I'm learning how to do things in a non-intuative way.
Take Embedded images. Illustrator loves them. I guess its because it doesn't have a 'Collect for Output' feature - but don't get me started on that! Anyway, my point is when I receive a file with embedded images and I want to open those embedded images, my INTUITION tells me to simply double click the image and wait for it to open in Photoshop. After all, aren't Adobe always telling us that Illustrator and Photoshop are seamlessly integrated in ways Freehand can only dream of?
So, I double click and nothing happens. I then double click the thumbnail picture in the Image box. Up comes a Link Information box. Lots of facts and figures except how to open it. Then I click on the blue underlined word saying 'Embedded'. More options here - but none of them any good because I haven't got the original on my system.
To cut a long story short, I finally discover that by copying the embedded image, then opening Photoshop, then opening a new document, then pasting, then clicking the transform tick box, then flattening - I can get to see the embedded pic.
No nifty link back though. If I want to update the image in Illustrator I have place it, scale it position it and delete the original. I tried Relink - but it pasted the new pic at 90 degrees to the original!
So how about it? Double Click Embedded images to open in Photoshop? Change them and they automatically update in Illustrator? Am I asking too much? Am I missing the point?

Not a feature. In fact, there's no way, using just Illustrator, to extract embedded images. But then, it's only at version THIRTEEN! I save a PDF using no downsampling or compression, then open in Photoshop. When you open a PDF in Photoshop you are given the option to rasterize any pages or extract images embedded in the PDF. Choose Images then select the images you want. Save as TIF or PSD and re-link in Illustrator.
Yes, it is stupid.

Edit Original w/ Embedded Images: A Script Or Plugin to Make This Work?

We receive so many files from customers with embedded images rather than links; I'd love if Edit Original would still work with embedded images, perhaps only for those filetypes that it recognizes as being able to open into Photoshop.
Does anyone know of a script that would add this functionality, or perhaps a plugin?

Hate to bust your bubble but once a file has been embedded in AI it becomes just raster data without a file type. Not a JPEG, not a PSD, not a TIFF—just raster data. You can open the file with Photoshop and select Images from the Open dialog or open a version in Acrobat and extract the images from there.

Script to check resolution of the embedded images in illustrator

Hi All,
Is there is any script available to check the resolution of the embedded image in the illustrator.
Regards,
Vinoth

Hi Kenny,
I posted the following file to the NI outgoinng ftp site-- you'll have to grab it in the next few days before it gets automatically wiped off.
ftp.ni.com/outgoing/CompanyName.zip
Look for the "Using ResultsList Menus.doc" file in the main "CompanyName" folder, it will have installation instructions and step by step how-to-use information. Also feel free to email me with questions at [email protected]
Brad Turpin
DIAdem Product Support Engineer
National Instruments

How see the original resolution of an image in Photoshop CC

I need to see the original resolution of a jpg, but when I go to Image size it is in much higher resolution. the jpg is about 600K which makes me suspect it is in 72 dpi, but when I open it in Photoshop CC it is about 23 MB and in 300 dpi. I need to know what the original is, and Image size is where I used to go to find out before I switched to CC. Does anyone know how I can check the original size and resolution?

I mean the size and resolution that the image was in when received it. I
had it as a jpg from my client, and have made no adjustments myself so
far. You are correct that I was just assuming that something must be
wrong. What puzzled me is that when I looked at the info about the
picture by right clicking on it, it was 600K, but when I opened it in
Photoshop it was 23 MB. What is the explanation for that?
2014-11-28 13:58 skrev c.pfaffenbichler:
HOW SEE THE ORIGINAL RESOLUTION OF AN IMAGE IN PHOTOSHOP CC
created by c.pfaffenbichler in Photoshop General Discussion -
View the full discussion

Extracting an embedded image file

I'm hoping that someone can confirm this:
If I have an embedded image file in InDesign, and I don't have the original image file -- is it possible to un-embed the image file without loosing any of the original quality of the file? I tried choosing Unembed from the Links panel menu. Is that a good way to unembed without loss?

It's the only way.
Dave

How To: Using Embedded Images for Drawing Fills

I had some challenges making this seemingly simple feature work, so as I found no examples, I made an example on how to do this. The key I found was using the “BitmapAsset” class which is compatible with posting our embedded image into BitmapData objects. That put things together.
See the full narrative at: http://digitalshowcase.biz/wordpress/?p=234
Download the Flex Project here: http://digitalshowcase.biz/flex/FillsWithEmbeddedImages.zip
- Alan Gruskoff, Digital Showcase LLC

>>says that this export technique does not work, it produces a low res screen version of the file.
Are you certain the original files were any better?
My preferred method of doing this works well, but it takes a few extra steps. I'd make a high-res PDF out of the PM file, then pick apart the PDF to extract the graphics. Are the graphics raster or vector? If they're raster, you can use Acrobat's Touch-up Object tool to open them in Photoshop. If they're vector, you can open the PDF in Illustrator and save out the graphics from there.
HTH

Extract embedded xml from PDF/A-3b (also creation)

Hello there,
in the context of a research project, we are currently trying to extract embedded xml from a PDF/A-3b document via code.
The project deals with establishing a new invoicing standard (Zugferd: ferd-net.de, only german). Invoices are expressed via xml, which is embedded in PDF/A.
What we are trying to archive is extraction of the xml via java code. For testing purposes, we are currently using an third party skd to extract the invoice-xml, by calling a .EXE file and then picking up the results in java.
I currently have only one valid example file that can be processed via this sdk. To get more data, i used the test version of acrobat pro to alter the embedded xml file. To be more specific, i deleted the embedded file, added a new xml file, and used preflight to make the PDF conform to /A-3b. Although the file seems to have the same properties as the original, it can no more be processed via the extraction sdk. Since messing around with acrobat does not seem to get me anywhere, i am now looking into extracting data from the pdf my self.
Is there any present implementation/library/solution for extracting data in a java context? The few third party tools i found are all based of a .net/windows native environment. I have heard rumors about Adobe giving out tools to extract embedded data from PDF/A?
How is it the other way around? Is it possible to embedd xml into a PDF via Java? Given there allready is PDF file which we can attach to.
I really appreciate reading and thanks for any help or input!
Greetings,
Florian

Hi Florian,
I would look for general purpose PDF libraries that can open a PDF and access data objects in it.
All in all it is not too difficult to get to the embedded XML, once you have a library that can access and read data structures/data objects inside a PDF file. Some understanding of the inner workings of PDF data structures will help you get the job done (e.g. read the section about embedded files in the PDF standard / ISO 32000-1, as well as the chapter about PDF syntax).
Olaf
Am 19 Aug 2013 um 13:19 schrieb xfrapp <[email protected]>:
Extract embedded xml from PDF/A-3b (also creation)
created by xfrapp in PDF Language and Specifications - View the full discussion
Hello there,
in the context of a research project, we are currently trying to extract embedded xml from a PDF/A-3b document via code.
The project deals with establishing a new invoicing standard (Zugferd: ferd-net.de, only german). Invoices are expressed via xml, which is embedded in PDF/A.
What we are trying to archive is extraction of the xml via java code. For testing purposes, we are currently using an third party skd to extract the invoice-xml, by calling a .EXE file and then picking up the results in java.
I currently have only one valid example file that can be processed via this sdk. To get more data, i used the test version of acrobat pro to alter the embedded xml file. To be more specific, i deleted the embedded file, added a new xml file, and used preflight to make the PDF conform to /A-3b. Although the file seems to have the same properties as the original, it can no more be processed via the extraction sdk. Since messing around with acrobat does not seem to get me anywhere, i am now looking into extracting data from the pdf my self.
Is there any present implementation/library/solution for extracting data in a java context? The few third party tools i found are all based of a .net/windows native environment. I have heard rumors about Adobe giving out tools to extract embedded data from PDF/A?
How is it the other way around? Is it possible to embedd xml into a PDF via Java? Given there allready is PDF file which we can attach to.
I really appreciate reading and thanks for any help or input!
Greetings,
Florian
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Retreiving Embedded Images Information

I have a two-part question. One, I need to know why Illustrator displays embedded images at 72 dpi. Two, how can I retreive an image's correct size and/or resolution? Illustrator has the information contained somewhere, I see it being displayed in this window:
Is there a reason it returns the incorrect "Dimensions" when I ask for the width of a rasterItem?
I'm using ExtendscriptToolkit 2 to write jsx to control Illustrator CS4.
Thank you!!!

So, it's working!!! It's not what I wanted to come away with but it's WORKING!!! Thanks, Muppet Mark!
#target illustrator;
var resolution = detectLowRes(docRef);
function detectLowRes(docRef){
     for (var num=0; num<docRef.rasterItems.length; num++){
          var resolution = objectResolution(docRef.rasterItems[num]);
     return resolution;
function objectResolution(obj) {
     // 1. copy\paste obj in new document
     obj.selected=true;
     copy();//
     var docRef2 = documents.add(DocumentColorSpace.RGB, 1500, 1500, 1); // new doc RGB
     paste(); //
     // 2. trace obj
     var objTrace =obj.trace();
     // 3. extract resolution property
     objTrace.tracing.tracingOptions.resample = false;
     var objRes = Math.round(objTrace.tracing.imageResolution);
     objTrace.tracing.releaseTracing();
     // 4. delete temp document
     docRef2.close(SaveOptions.DONOTSAVECHANGES);
     // 5. return resolution
     return objRes;
alert("Mind = Blown: " + resolution + " dpi");
If anyone can see a way to clean this up further please let me know.

Embedded image in html body of the email is not appearing in Outlook mail box

My application Basically gets the un delivered emails from the outlook account.Composes the email from information then also appends the signature of email.The signatures may be multiple , form will show these signatures as a dropdown usin webbrowser control there both image as well as links appear well.But the same if draft them to outlook drafts folder the image in the signature misses and shows image not available.II fetch the signature from user local signature folder , convert it base64 string and set the string as source for image element and append this body of the email.I basically use Outlook COM object to achieve thesepublic void AddImageContentToHtml(List<TamDetails> tamList,string html,string key)
string htmlContent = html as string;
string imageSource = string.Empty;
HtmlNode signatureNode = null;
HtmlNodeCollection nodeCollection = null;
List<string> imagePaths = null;
string requiredImage = string.Empty;
string base64Image = string.Empty;
if (!string.IsNullOrWhiteSpace(key))
imagePaths = ImageDict[key];
foreach (string strPath in imagePaths)
//string appDataDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\Microsoft\\Signatures";
requiredImage = strPath;
string [] commonPath = { Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Microsoft", "Signatures")};
string[] validPaths = requiredImage.Split(commonPath, StringSplitOptions.RemoveEmptyEntries);
if (validPaths.Count() > 1)
var path1 = commonPath[0];
var path2 = validPaths[1];
int index = path2.IndexOf('/');
path2.Remove(index);
requiredImage = path1 + path2;
if (!string.IsNullOrEmpty(requiredImage))
if (File.Exists(requiredImage))
base64Image = CreateBase64Image(requiredImage);
string fileExtension = Path.GetExtension(requiredImage);
imageSource = "data:image/" + fileExtension.Remove(0, 1) + ";base64," + base64Image;
if (!string.IsNullOrWhiteSpace(htmlContent))
try
HtmlDocument htmlDoc = new HtmlDocument();
if (!string.IsNullOrEmpty(imageSource))
htmlContent=htmlContent.Replace(requiredImage, imageSource);
htmlDoc.LoadHtml(htmlContent);
// HtmlNode node = new HtmlNode()
signatureNode = (htmlDoc.DocumentNode.Descendants("body").FirstOrDefault());
nodeCollection = signatureNode.ChildNodes;
catch (Exception ex)
AppLogException.LogError("Error in appending Signature Image", ex);
if (tamList != null)
tamList.ForEach(a =>
//StringWriter sw = new StringWriter(new StringBuilder(a.MailItem.HTMLBody));
HtmlDocument doc = new HtmlDocument();
doc.LoadHtml(a.SourceEmail);
var node = doc.DocumentNode.Descendants("div").FirstOrDefault();
if(nodeCollection != null && node != null)
foreach (var childNode in nodeCollection)
node.AppendChild(childNode);
a.MailItem.HTMLBody = doc.DocumentNode.OuterHtml;
//using(HtmlTextWriter htmlWriter = new HtmlTextWriter(sw,a.MailItem.HTMLBody))
// htmlWriter.RenderBeginTag(HtmlTextWriterTag.Div);
// if(!string.IsNullOrWhiteSpace(signatureNode))
// htmlWriter.
// htmlWriter.RenderEndTag();
}My mail html body is <html xmlns:v="urn:schemas-microsoft-com:vml"
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:w="urn:schemas-microsoft-com:office:word"
xmlns:m="http://schemas.microsoft.com/office/2004/12/omml"
xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=windows-1252">
<meta name=ProgId content=Word.Document>
<meta name=Generator content="Microsoft Word 14">
<meta name=Originator content="Microsoft Word 14">
<link rel=File-List href="Sanjay%20S_files/filelist.xml">
<link rel=Edit-Time-Data href="Sanjay%20S_files/editdata.mso">

<link rel=themeData href="Sanjay%20S_files/themedata.thmx">
<link rel=colorSchemeMapping href="Sanjay%20S_files/colorschememapping.xml">

<style>

</style>

</head>
<body lang=EN-US style='tab-interval:.5in'>
<div
<p S<o:p></o:p></p>
<p
<p
<p gte vml 1]><v:shapetype id="_x0000_t75"
coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe"
filled="f" stroked="f">
<v:stroke joinstyle="miter"/>
<v:formulas>
<v:f eqn="if lineDrawn pixelLineWidth 0"/>
<v:f eqn="sum @0 1 0"/>
<v:f eqn="sum 0 0 @1"/>
<v:f eqn="prod @2 1 2"/>
<v:f eqn="prod @3 21600 pixelWidth"/>
<v:f eqn="prod @3 21600 pixelHeight"/>
<v:f eqn="sum @0 0 1"/>
<v:f eqn="prod @6 1 2"/>
<v:f eqn="prod @7 21600 pixelWidth"/>
<v:f eqn="sum @8 21600 0"/>
<v:f eqn="prod @7 21600 pixelHeight"/>
<v:f eqn="sum @10 21600 0"/>
</v:formulas>
<v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/>
<o:lock v:ext="edit" aspectratio="t"/>
</v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:381.75pt;
height:63.75pt'>
<v:imagedata src="Sanjay%20S_files/image001.png" o:title="Signature"/>
</v:shape><![endif]--><![if !vml]><img width=509 height=85
src="Sanjay%20S_files/image001.png" v:shapes="_x0000_i1025"><![endif]><o:p></o:p></p>
<p
</div>
</body>
</html>

Hi ssanjay.brillio,
According to your description, you'd like to send a email with an embedded image in the signature.
I suggest you sending the image in the last of the body of email instead of operating the signature of email.
The following example codes demonstrate how to send email using ImportHtml method with embedded images.
SmtpMail oMail = new SmtpMail("TryIt");
SmtpClient oSmtp = new SmtpClient();
// Set sender email address, please change it to yours
oMail.From = "[email protected]";
// Set recipient email address, please change it to yours
oMail.To = "[email protected]";
// Set email subject
oMail.Subject = "test HTML email with embedded image";
// Your SMTP server address
SmtpServer oServer = new SmtpServer("smtp.emailarchitect.net");
// User and password for ESMTP authentication, if your server doesn't require
// User authentication, please remove the following codes.
oServer.User = "[email protected]";
oServer.Password = "testpassword";
// If your smtp server requires SSL/TLS connection, please add this line
// oServer.ConnectType = SmtpConnectType.ConnectSSLAuto
try {
// Import html body and also import linked image as embedded images.
// 'test.gif is in c:\\my picture
oMail.ImportHtml("<html><body>test <img src=\"test.gif\"> importhtml</body></html>", "c:\\my picture", ImportHtmlBodyOptions.ImportLocalPictures | ImportHtmlBodyOptions.ImportCss);
Console.WriteLine("start to send email with embedded image ...");
oSmtp.SendMail(oServer, oMail);
Console.WriteLine("email was sent successfully!");
} catch (Exception ep) {
Console.WriteLine("failed to send email with the following error:");
Console.WriteLine(ep.Message);
If you have any other concern regarding this issue, please feel free to let me know.
Best regards,
Youjun Tang
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How do I export jpgs as tifs with the original resolution ?

Hi,
I am very new to Lightroom 5 (I only installed it today (on Windows 8.1) :-)) but I have read Victoria Bampton's Quick Start Guide and have read a number of forum posts over the last few weeks to get an idea about how the program generally works.
I am embarking on a project to scan and archive my family's photos and videos, and I will be using Lightroom to manage the collection. To start the project, I have just imported over 10,000 digital photos taken by a variety of cameras (36 of them, according to Lightroom !) over the last 12 years or so into a new Lightroom catalogue.   These are all currently JPEG files, but I want to keep TIFF files in the collection because my research has led me to the conclusion that TIFF is a better long-term archival format.
I started by doing an Export of a small number of photos to save the .jpg files as .tif files, but when reviewing the results, I noticed that the image's resolution was changed during the export. For example, one original jpg is only 96ppi but the exported tif is 240ppi. Another jpg is 180ppi and the tif is 240ppi. At least, that's what the metadata seems to be telling me (via the Details tab of the Properties dialog in Windows), so I assume it's true...
I understand that the 240ppi that I am seeing in the .tif file metadata was specified in the Image Sizing section of the Export dialog, so that's not the issue.
I would prefer it if the .tif file has the exact same resolution (ppi) as the original .jpg, but I am unable to work out how to do it.   It would be great if the resolution setting in the Export dialog was controlled by the Resize to Fit checkbox, like the other settings in the section, but it doesn't appear to be (it's enabled even if the Resize to Fit checkbox is unticked).
I then thought about using the Library Filters to filter by the Horizontal Resolution metadata, so that I could select all the photos with the same resolution and export just those with the Resolution setting in the Export dialog set to the right number, and then repeat that process for each different group of original photos with a different resolution. Unfortunately, I have not been able to work out how to filter by the horizontal resolution metadata field - it doesn't seem to be available in the dropdown list of fields shown when I click on the up-down arrow next to the "Date" or "Camera" (etc.) columns in the Library Filter pane.
Finally, here's my question (or three):
Is there a way to export .jpgs to .tif files while keeping the original resolution ?
Alternatively, is there a way to select groups of photos by their horizontal or vertical resolution (so just those photos could be exported in a group with the right resolution specified) ?
Or is there any other way to do what I want (convert jpg to tif with the same resolution and keeping all the metadata) ?
Thanks for reading all the way through to the end.
John.

These are all currently JPEG files, but I want to keep TIFF files in the collection because my research has led me to the conclusion that TIFF is a better long-term archival format.
I'm not sure why you say this. In terms of long-term archival format, I think the two are equal, I am not aware of other reasons to do this, and thus in my opinion, the task of globally turning all your JPGs into TIFFs seems unnecessary. You don't gain anything by doing this. But you sure will spend a lot of time and take up a lot of disk space doing this.
I would prefer it if the .tif file has the exact same resolution (ppi) as the original .jpg, but I am unable to work out how to do it.
Again, I think you have embarked upon an unnecessary task. The ppi in the file is essentially meaningless. A photo that has (for example) 3000x2000 pixels saved at 240 ppi is the exact same photo as the same photo 3000x2000 saved at 180ppi, not a single pixel has changed. You are placing a meaning and importance to this ppi number that just doesn't exist.
To answer your questions at the bottom, I would advise you to not do the things you are talking about, it seems to me that you have greatly misunderstood things.

How do I hide the file names/path names of embedded images in a PDF document?

I created a PDF document from a Word document, and the problem is that the PDF document shows the file names and path names for all of the embedded images in the PDF document. I don't want that information displayed. I don't want to send the PDF out to clients and have them read the names I've assigned to those images, plus it looks messy. And I've lost many of the original image files so they only exist in the Word document, thus I can't go back and rename them. I searched the internet for an answer but I couldn't find one anywhere.

When you create a tagged (accessible) PDF file from Word, placed bitmap images will use their filename as the "ALT text" if you don't define something else for the text to say, because an image without any ALT text is a failure against the accessibility standards. You can't change that default action, so you should put your own meaningful text into the ALT field for each image - which is what you should be doing anyway if the PDF is standards-compliant.
You can can set the text in Word, but it depends on your version as to where the dialogs are - Google for it - or you can change/delete it in Acrobat using the tags navigation pane on the left side of the window (right-click the sidebar if it's not visible). Drill down through the tags structure to find the "<Figure>" tag you want to change, right-click and choose Properties, then put something in the "Alternative text" field. This process isn't something you can easily automate, but if you don't need tags at all, you can save without tags (or print to PDF).

Extracting embedded image at original resolution

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