I have a set of .dat files. They are images of characters from the UNIPEN character database. I want to convert them into .jpg images for further processing. I use the following simple code for that, but it gives an error message saying that .dat extention is invalid. Can someone suggest a method for that?
Bitmap ^myImage = gcnew Bitmap("D:\\charimage\\a.dat");
myImage->Save("D:\\test.jpg");
Related
I'm reading a tiff file using OpenSlide. Due to its large size, I'm planning to read the image by regions of 4k x 4k using read_region() function. After getting that region, I want to do the same process I have planned for the complete tiff file. To continue that process, I need the image read in OpenSlide. So I can use OpenSlide parameters.
I tried to read the selected region using read_region with Openslide again as follows.
wsi = wsi.read_region((0,0),0,(4000,4000))
wsi = openslide.OpenSlide(wsi)
The issue was I could use parameters I usually get when reading a tiff file using OpenSlide. Does anyone know a way to solve this issue?
let dataCer = '0�\u0007\u00060�\u0006��\u0003\u0002\u0001\u0002\u0002\u0010Q��\u0000����K��Z�Q��0\n\u0006\b*�\u0003\u0007\u0001\u0001\u0003\u00020�\u0001l1\u001e0\u001c\u0006\.............'
fs.writeFile('111.cer', dataCer);
let dataPdf = '%PDF-1.4\r\n1 0 obj\r\n<< \r\n/Length 9947\r\n/Filter /FlateDecode\r\n>>\r\nstream\r\nX��]�n#9p}���\u000f���\u0005\b\u0002X��<\'X \u001f�\u001b\u0010 \u0001���H�,6�R�Z�\u0014�N`�\n�T�t�ڼT\u0015���?ԋz��_�{IN_Bz�����O.............'
fs.writeFile('111.pdf', dataPdf);
The data dataCer and dataPdf I get from the application using the GET requests. I can only get this data in this encoding.
And now I need to save them as files.
Also, I will need to then save any data to the file in the same way (zip, rar, png, jpeg, ...).
When i use fs.writeFile, I get files that do not open.
fs.writeFile, can not keep the original state data, ignoring the encoding does not give me the desired result.
Please tell me how to get around this error?
Or which library can save data to any file in node.js, while ignoring the encoding?
I have extracted a PDF attachment from email and i have the content of PDF file like : Buffer ff 34 54 ,I want to convert this buffer to jpg image buffer. So that i can convert the the PDF to jpg image. Is there a way to convert the buffer directly?
I have saved the pdf file then using some third party module, I have converted that to jpg. But for that I have to write and read files many times.
Maybe this could help. Just googled pdf to image and got this.
npm install pdf-image
var PDFImage = require("pdf-image").PDFImage;
var pdfImage = new PDFImage("/tmp/slide.pdf");
pdfImage.convertFile().then(function (imagePaths) {
// [ /tmp/slide-0.png, /tmp/slide-1.png ]
});
I know there are answers regarding this question, but hear me out.
I am currently trying to make PDF out of .jpg files using img2pdf in python, but instead of appending the files to PDF it overwrites the already existing pages from the PDF.
Here's the code
import os,img2pdf
os.chdir("/home/aditya/Desktop")#images are inside desktop
root, dir, files = list(os.walk(os.getcwd()))[0]#files contains the
list of all names of all .jpg file
which I want to convert into PDF
with open("pdf_file.pdf","ab") as f:#PDF file is set to append
for img_file in files:
with open(img_file,"rb") as im_file:#read bytes from the image files
f.write(img2pdf.convert(im_file))#this line overwrites the exisiting
pages in the pdf despite the fact that
I have set it to #append
Any reason for this? Is there special attribute I need to pass?
Any help is appreciated. Thanks
img2pdf.convert does not convert image by image. It either does a single image or all at once
img2pdf.convert(list of images )
with open("pdf_file.pdf","ab") as f: #Open a pdf
f.write(img2pdf.convert(files)) #convert all the images and write bytes
I'm trying to build a suffix tree from a .docx file.
So first I unzipped the .docx file and then again created a .docx file with out compressing it. I used ICSharpCode.SharpZipLib.Zip.ZipOutputStream.SetLevel(0) method. Here I used C#.
This uncompressed .docx files can be opened without any error.
For the next step I used vc++. By using ifstream.open ("uncompressed.docx", ios::binary ); method I tried to open the file and store the content in a char array by using ifstream.read ( (char *)T, MAX_LENGTH - 1 ) method. But I could not get the actual content of uncompressed.docx file. When I tried to print the content of the char array(T) it printed some formatting tags rather than printing the actual text content of the uncompressed.docx.
I could not figure out what is the actual file that ifstream.open() method opens.It is not the document.xml file.
Please tell me how to get the actual text content from the uncompressed.docx file using VC++.