I have to insert two missing attributes in the DICOM headers of DICOM files in the entire series. The series has more than 100 files. Instead of processing the files one-by-one, is there a way in Python to batch process multiple files in a series in one go?
I could not find any resource for doing this except Sante DICOM which comes at a price
You can use dcmodify from the dcmtk to do that. See here: https://support.dcmtk.org/docs/dcmodify.html
It supports wildcards for filenames. It is not written in python, but you can use it as a self-contained "external" executable. And it is completely free including the possibility to modify its source code (C++)
Related
There are countless questions and answers that present different solutions to merge 2 or more PDF files and how to extract specific pages and create a PDF with this subset.
Unfortunately I could not find a way (either using a library or command line tools, since it will be scripted) to merge files, such that the resulting file is a valid PDF and later "split back" this file in separate files, using the same page ranges, to obtain the exact same original files (at the binary level).
Is this possible?
Once you merged the PDF files you cannot split the result and obtain the exact same original files at binary level. Source PDF files are not included as opaque binaries blocks in the merged file.
One possible solution solution, as #mkl said, is to use a PDF portfolio to embed the source files as they are. When viewing the portfolio you will see each file as it is, not as a long merged PDF file.
Purpose
I want my build system to produce one binary file that includes:
The bootloader
The application binary
The application header (for the bootloader)
Here's a small overview of the memory layout (nothing out of the ordinary here)
The build system already concatenates the bootloader and the application in a post-compilation script.
In other words, only the header is missing.
Problem
What's the best way to generate and inject the application header in the memory?
Possible solutions
Create a .bin file just for the header and use cat to inject it in my final binary
Use linker file to hardcode the header (is this possible?)
Use a script to read the final binary and hardcode the header
Other?
What is the best solution for injecting data in memory in a post compilation script?
SRecord is a great tool for doing all kinds of manipulation on binary and other file types used for embedded code images.
In this case, given a binary bootheader.bin to insert at offset 0x8000 in image.bin:
srec_cat bootheader.bin −binary −offset 0x8000 −o image.bin
The tool is somewhat arcane, but the documentaton includes numerous examples covering various common tasks.
I have time sequence of .stl files of particular geometry. I usually load all the time sequence .stl files in paraview and it works. I would like to know if there is any input file format where one can write all the time sequence geometry data in a single file and load in Paraview instead of having too many files ? I know that one can concatenate .stl files, but then it will be treated as single geometry, not as a sequence.
Thanks for the help.
ParaView supports lots of file formats that supports time sequence.
I would suggest using pvd format, wich is a ParaView native format.
Note : there will still be multiple files in a folder, but you will be able to open all files directly by opening the .pvd file.
MS Word's .docx files contain a bunch of .xml files.
Setup.exe files spit out hundreds of files that a program uses.
Zips, rars etc also hold lots of compressed stuff.
So how are they made? What does MS Word or another program that produces these files have to do to put files inside files?
When I looked this up I just got a bunch of results about compression, but let's say I wanted to make a program that 'wraps' files inside a file without making the final result any smaller. What would I even have to write?
I'm not asking/expecting any source code that does this, I just need a pointer. Is there something you think I'm misunderstanding based on what I've asked here?
Even a simple link to an article or some documentation would be greatly appreciated.
Ok, I'll just come up with some headers for ordinary files and write them along with the bytes of the actual files into one custom-defined file. You guys were very helpful, thank you!
Historically, Windows had a number of technologies to support solutions like this. These were often called Compound Files or Structured storage. However, I don't think the newer Office documents use these technologies. I think the Office file formats are similar to ZIP files with a different extensions. If you change a file with .docx extension to .zip and open it with your favorite compression tool, you'll see a bunch of folders and XML files.
Here are some links to descriptions of different file formats that create "files within files"
Zip file format
Compound File Binary Format (CFBF)
Structured Storage
Compound Document File Format
Office Open XML I: Exploring the Office Open XML Formats
At least on POSIX systems (e.g. Linux), a file is only a stream (i.e. a sequence) of bytes. And you can only grow (or shrink, i.e. truncate) it at the end - there is no way to insert bytes in the middle (without copying the rest).
You need some conventions, and some additional software, to handle it otherwise.
You might be interested in Sqlite, which gives you a library to handle some (e.g.) *.sqlite file as an SQL database
You could also use GDBM - a library giving you some indexed file abstraction.
libtar is a library to manipulate tar archives. See also tardy, a tar file postprocessor.
In one of my applications I need to merge many single PDF documents into one document, where each of the original PDFs is a page. Although many PDF libraries exist for most languages, I would like to write this myself if it's not too hard.
Is it necessary to implement a full-fledged PDF parser in order to merge PDF documents? Where and what would I start to read to find out what is needed for the task?
You can use the Debenu QuickPDF Library Lite (free) version to do it. Here is a very good example how to do it:
http://www.debenu.com/kb/merge-pdf-files-together-programmatically/