Is it possible to convert tiff file into a PDF file, using pdfclown?
I've started a project using PDFClown, and I'm afarid I got stuck (maybe I'll have to switch to IText now...)
Thanks.
No, it isn't. PDFClown supports only JPEG images, as stated on their Features page.
Related
Currently, my app creates GeoTiff tiled files using following options:
PROFILE=GeoTIFF
TILED=YES
BLOCKXSIZE=xxx
BLOCKYSIZE=xxx
COMPRESS=JPEG
PHOTOMETRIC=YCBCR
JPEG_QUALITY=xx
However, some apps that use my served tiles do not work due to "invalid" JFIF format.
How can I force gdal to ensure JFIF format in GeoTiff tiles?
See my own answer in https://gis.stackexchange.com/questions/426732/generate-jpeg-ycbcr-tiles-in-geotiff-file-with-jfif-format-instead-pure-jpeg-for/428023#428023.
Basically, solution involves gdal code modifications
I have found many answers about converting .svg files to rasterized formats, however I would prefer to keep it as a single svg file. I got excited when I found react-native-svg, but was then disappointed when I saw their image example used a .jpg file.
Is keeping my image as a vector possible? Am I trying to do something unwise?
Thank you for your help.
You need to convert your SVG's to use the react-native-svg library, this is a useful tool to do so: https://react-svgr.com/playground/
This does not rasterise the image, it will remain as a vector just in a format that the library can parse.
I'm doing an internship for an IT company which needs a document application for its firmware docs (md files).
The request was to maintain these md files and to convert them to rst format (I used pandoc). So now I have a configured Sphinx application with only rst files. The problem now is that some rst have links to SVG images, and I have to use the latex builder of Sphinx to convert them to PDFs.
I've searched around and I found this solution from 2 years ago, which was essentially what I was looking for: https://sites.google.com/site/nickfolse/home/sphinx-latexpdf-output-with-svg-images. I tried to implement it but I'm not an expert with GNU makefiles and I don't know if the current version of Sphinx allows it or if it is out there an easy workaround, so the thing didn't succeed.
Does someone have a viable solution for this?
At this time, SVG is still not supported. I work around it in Pyramid docs by exporting the original file (OmniGraffle) to both SVG and PNG.
In docs/narr/router.rst:
.. image:: ../_static/pyramid_request_processing.*
And we place images in docs/_static.
The HTML uses SVG and the PDF uses PNG.
There is available the Sphinx SVG to PDF converter extension to automatically convert from SVG to PDF.
My use case is pretty simple. I need to convert the PDFs to images.I tried using apache pdfbox and i am having some trouble in converting pdfs which contains scanned images. when i convert scanned image the image clarity is lost due to compression/scaling. So i was trying to extract the image data from the PDF and then store it. But the problem is i may get PDF files which will contain images and text in which case i would need to fallback to image conversion mode. The problem is how to differentiate between the pages/documents having only image and the ones with composite data. I was thinking i could use ProcSet defenition for this purpose but looks like it is marked as obsolete and non-reliable according to PDF specifications. Other possibility is to check all the objects linked to that page and see if it contains anything other than images. Please let me know if there is an easier way of doing this
Thanks
If your intention is convert pdf to image, It is better to use ImageMagick for that. If you use ImageMagick, there is a lot options to change the quality of the image. And converting pdf to image is pretty simple using ImageMagick.
I'm trying to read JPEG2000 images in Magick++ (the C++ API of ImageMagick). To read an image I use the following code:
Image img("path/to/my/image.jp2");
But when I try to do this, ImageMagick throws an Exception and doesn´t load the image.
I extract the images out of PDF files. Could it be that something´s different to normal JPEG2000 images? To extract the images I read the stream of Image objects which have a JPXDecode-filter and save them to a file.
Hope someone can help me!
ImageMagick uses a package called JasPer to handle JPEG2000's. According to the wikipedia page on OpenJpeg, JasPer does not completely support the JPEG2000 specification. I have several extrected JPEG2000 that open fine in QuickTime, but fail to decode with ImageMagick.
I have had better results using OpenJpeg to decode the the Jpeg2000. The interface is less flexible, it will convert to PNG and BMP.