OmniDocWhat should I do if the PPT to PDF image is blurry? Keep settings clear
When converting PPT to PDF, the image becomes blurry. This is most likely because the source image resolution is insufficient or it was compressed during export. This article determines the cause based on the symptoms, and provides specific methods for replacing the original image, selecting the export file, and enlarging and checking page by page.
Key points of this article
- Check the source image first: screenshots and webpage images in PPT will look blurry when enlarged. Replace them with the original image before exporting.
- Reduce the image compression strength before exporting and avoid small presets, otherwise the image quality will be actively compressed.
- Try to use shapes to draw charts. Do not take screenshots first and then paste them to reduce losses caused by bitmaps.
- After exporting, enlarge the view to a view that is significantly larger than the actual size and check page by page to find out the blurry pages and then go back and replace the materials.
- Export settings can only prevent additional compression and cannot increase the number of pixels in the source image.
After exporting the prepared PPT to PDF, many people find that the screenshots, charts and photos become blurred, and there are mosaics or color blocks when they are enlarged. Most of these problems are not caused by the PDF format itself, but because the resolution of the source image is not enough, or the image is compressed during the export process.
This article is written for people who have encountered the problem of blurry images when converting PPT to PDF. The point is not to explain how to export again, but to help you determine where the blur is, and then use the corresponding settings to preserve the clarity as much as possible. After reading, you will be able to tell whether the problem lies in the source file, export settings or conversion process, and know how to check page by page.
The PPT to PDF image is blurry, how to set it to keep it clear? One sentence conclusion
First make sure that the pictures in the PPT are clear enough, then select high-quality settings when exporting, avoid presets with heavy compression, and finally enlarge and check page by page. The table below provides specific methods based on your situation.
| your situation | Recommended practices | reason |
|---|---|---|
| The pictures in the PPT are screenshots or small pictures copied from the web page. | Find the original high-resolution image and replace it | After enlarging the small image and then exporting it, the blur will be difficult to recover by setting it up. |
| The chart is drawn using PPT’s built-in shapes | Keep the shape format, don’t take a screenshot and then paste it | Shapes are re-rendered at the output resolution on export, which is usually clearer than bitmaps |
| Files are mainly used to print or send to others for closer inspection. | Choose high-quality or print export, do not choose the small-volume solution | The small size solution will actively compress the image, and details will be easily lost. |
| There are a lot of photos in the slideshow and the file is very large | First use a higher level of unified compression in PPT, and then check page by page. | When the compression ratio is too large, photo details will be significantly reduced. |
| After exporting, you need to use OmniDoc for processing (translation or editing) | Make sure the PDF itself is clear before uploading it for processing | OmniDoc will retain the layout and images, but if the source file is blurry, the conversion will not make the image clear. |
# determine which problem it is first
The corresponding reasons for different symptoms are different, and the methods are also different. Check the table below to find out what happened to you first.
| Symptom | Common reasons | How to confirm |
|---|---|---|
| The enlarged picture has color blocks or mosaics. | The source image has a low resolution or has been compressed before insertion | Select the picture in PPT, check its pixel size, and compare it with the same position in PDF |
| The color of the picture is lighter and the edges are noisy. | Small size or strong compression options are selected for export | Use one copy of each of the two export settings, and compare them with the same page after enlarging |
| The edges of the text are pasted and cannot be selected | The text is screenshot and pasted as a picture | Try to select a paragraph of text in PDF. If it is not selected, it is a picture. |
| Only individual pages paste | Those pages use screenshots, transparent icons or motion pictures | Look through the pages one by one, write down the numbers of the pasted pages, and deal with them separately. |
| The whole page is empty, which is more obvious when it is enlarged. | Slide size does not match export resolution | Check the page size setting of PPT and compare it with the actual size and enlarged view in the reader. |
| The scanned piece or screenshot converted into PDF will be pasted at the very beginning. | The resolution of the source PDF itself is low. | Do not make any conversion, directly enlarge the original file, if the original file is blurred, the problem is at the source |
# item-by-item troubleshooting and repair
Deal with it in the order of the easy before the difficult. First check the source file, then look at the export link, and finally check the results.
Source file itself is not clear enough
- Check the picture page by page in PPT. Select the picture to see if it is a small picture copied from a web page or chat software. Replace the original image if you can find it, and accept the upper limit of the existing definition if you can't find it.
two. Replace the screenshot with a shape or high-resolution picture. Try to draw the chart with the shape that comes with PPT, do not take a screenshot and then paste it, so that the lines and text will be sharper when you export later.
- Check the picture display size. If the picture is pulled far beyond the size of the original pixel, it will usually become virtual after export. Reduce the display size and retain the original pixels, the effect is usually more stable.
Image quality is degraded during export
- Deal with PPT image compression before export. Find the option to compress the image in the settings of the demo software, select a file that maintains a higher image quality, and avoid small presets.
two. Select the option of high quality or print class when exporting. The name of different software is different, the key is to see whether the picture quality or resolution is specified in the description, and give priority to higher gear.
- After export, use a PDF reader to zoom in enough to see the details, and check the chart lines, small print and photo details. Record the page number of the paste, go back to PPT to replace the corresponding material and export it again.
- If you want to use OmniDoc to process the PDF (such as translation or editing), do a magnification check with the original before uploading. OmniDoc retains the layout and images, and the processing results can be compared page by page with the original to make sure that the images have not been accidentally changed.
# how to avoid the next occurrence
-insert the original high-resolution image directly when doing PPT, and do not use the screenshot of the web page as official material. -the chart retains the editable shape format and directly changes the graph when it needs to be modified to avoid repeated screenshots and compression. -before each official export, fix a set of export settings and compare them with an one-page sample sheet to form a habit. -before sending it to someone, open it on another computer or another reader and make sure the picture hasn't changed. -multiple conversions of the same file will overlay compression. Keep an original PPT backup and do not use the converted PDF as a source file.
# frequently asked questions (FAQ)
1. Can the paste of the picture be repaired with software after export?
The original insufficient resolution of the picture, can not rely on conversion to become clear. What can be done is to find the original image and replace it, or regenerate the file with a higher export file.
2. I have chosen high quality, why is it still vague?
High-quality settings can only reduce the extra compression in the export process and will not increase the number of pixels in the source image. Check the original size of the picture before deciding whether to replace the material.
3. How to tell if the picture in PDF is a screenshot?
Try to select the text next to the picture in PDF. If the text can be selected, and the picture area is clicked into a whole block, it is probably a bitmap, that is, a screenshot or photo.
# Summary
After PPT is converted to PDF, the image is blurred, usually starting from both the source image and the compression setting. Most of the problems can be located and solved by replacing the original picture, selecting a higher gear when exporting, and zooming in and checking page by page.
