How do I render the below asymptom code in google doc? Is there a way?
[asy]
size(75);
pair A,B,C,D;
B = (0,0);
A = (0.4,-0.8);
C =(-0.4,-0.8);
D= (0,-0.8);
draw(D--B--A--C--B);
label("$B$",B,N);
label("$D$",D,S);
label("$A$",A,SE);
draw(rightanglemark(A,D,B,3.5));
label("$C$",C,SW);
[/asy]
Currently, there is no support for asymptote in Google doc. However, since asymptote supports rendering to an image file, you could just render to a .png (or any other format of your liking).
The documentation suggests using the -f flag for this, so you should try
asy -f png yourfilename
Afterwards, you can copy and paste the image into your document.
Related
I want to convert a piece of SVG to MVG. Could I do something similar to this convert msvg:pram.svg pram.mvg using RMagick methods? I don't want to save the output in a file, but I want to have it in a variable in Ruby.
In general, converting an image in one format to another format is as simple as making a copy of the image using a different suffix. https://rmagick.github.io/comtasks.html#convert
Use the to_blob method to get an image as a Ruby string:
https://rmagick.github.io/comtasks.html#blob
I am trying to figure out if text metadata like font-size, font-family, bold/italic etc. can be captured using Tesseract. Below is the code I used to try it but that did not work and returned "None". Using, Tesseract version = 4.1.1, Tesseract-OCR engine version = 5.0.0
with open(Image_file_location, "rb") as image:
f = image.read()
b = bytearray(f)
with tesserocr.PyTessBaseAPI() as api:
image = Image.open(io.BytesIO(b))
api.SetImage(image)
api.Recognize()
iterator = api.GetIterator()
print(iterator.WordFontAttributes())
Currently, using Tesseract, I was able to capture text properly but not meta-data. I have attached a sample image file and example expected output.
Expected Output:
[Font:"some_font", Font_family:"some_font_family", Bold, font_size:"some_font_size] GCEO Review
[Font:"some_font", Font_family:"some_font_family", Bold, font_size:"some_font_size] Dear Shareholders,
[Font:"some_font", Font_family:"some_font_family", Bold, font_size:"some_font_size] TURNING THE....
[Font:"some_font", Font_family:"some_font_family", Bold, font_size:"some_font_size] We have executed well and gained mobile share in our core.........
So, basically, wherever there is a change in meta-data, we should be able to capture the information and prepend that information before that sentence.
I'm trying to read the exif data from a .JPG image. I've tried differents solutions found here and there (PIL, piexif, exifread...) and none of them worked for this set of images. It worked for other images taken from another camera but not for this one, all these different methods returning empty dictionaries. It seems that there is no exif data but (I apologies for my newbyness) when I RIGHT-click + properties (I use windows), I do see what is exif data to me : date of creation, etc...
Here is one image :
image.JPG
If another of the thousands of anonymous heroes could help me on this one, I would be very grateful...
Alright so I found a solution which I share now.
The problem is that the libraries that open metadata are not taking all possible configurations for the image file and therefore, they can handle some and some others they cannot. I finally made it using exiftool, an executable that I dowloaded on my windows on this link :
https://sno.phy.queensu.ca/~phil/exiftool/
Then I paste the executable in a folder and I add exiftool.py in that folder, that I got from :
https://github.com/smarnach/pyexiftool/find/master
Then, using this small piece of code (for example):
import exiftool
with exiftool.ExifTool("exiftool.exe") as et:
metadata = et.get_metadata_batch(files)
for d in metadata:
print("{:20.20} {:20.20}".format(d["SourceFile"],
d["File:FileCreateDate"]))
Of course, this is just to show that you indeed can access the metadata, then you can do whatever you want with that. Here is the documentation of the library exiftool : http://smarnach.github.io/pyexiftool/
Cheers, JM
I have some existing PDF files and what I want is to highlight some content by overlaying circles or straight lines. I've looked at some NodeJS PDF libraries but couldn't find a solution (some libraries allow creating a PDF from scratch and draw into it; other libraries can modify existing PDFs, but do not support drawing).
A (Linux / OSX) command line solution (e.g. using ImageMagick or some other library) would be perfectly fine, too.
Edit I've since found out that with Image/GraphicsMagick I can in fact do sth. like gm convert -draw "rectangle 20,20 150,100" xxx.pdf[7] xxx2.pdf, but this (1) either draws on all pages or else only on a single one, but then the resulting PDF will only contain that page; (2) the output PDF will contain a bitmap image where I would prefer a PDF with text content.
Edit I've just found HummusJS which is a NodeJS library to manipulate PDF files via declarative JSON objects. Unfortunately, apart from the scrace documentation, the unwieldy API (see below), the tests fail consistently and across the board with Unable to create PDF file, make sure that output file target is available.
completely OT not sure what it is that makes people think such utterly obfuscated APIs are better than simple ones:
var settings = {modifiedFilePath:'./output/BasicJPGImagesTestPageModified.pdf'}
var pdfWriter = hummus.createWriterToModify('./TestMaterials/BasicJPGImagesTest.PDF',settings);
var pageModifier = new hummus.PDFPageModifier(pdfWriter,0);
pageModifier.startContext().getContext().writeText('Test Text', ...
...
var copyingContext = inPDFWriter.createPDFCopyingContextForModifiedFile();
var thirdPageID = copyingContext.getSourceDocumentParser().getPageObjectID(2);
var thirdPageObject = copyingContext.getSourceDocumentParser().parsePage(2).getDictionary().toJSObject();
var objectsContext = inPDFWriter.getObjectsContext();
objectsContext.startModifiedIndirectObject(thirdPageID);
var modifiedPageObject = inPDFWriter.getObjectsContext().startDictionary();
A couple of helpers with HummusJS, to assist with what you are trying to do:
Adding content to existing pages - https://github.com/galkahana/HummusJS/wiki/Modification#adding-content-to-existing-pages
Draw shapes - https://github.com/galkahana/HummusJS/wiki/Show-primitives
using both, this is how to add a circle at 'centerx,centery' with 'radius' and border width of 1, to the first page of 'myFile.pdf'. The end result, in this case will be placed in 'modifiedCopy.pdf':
var pdfWriter = hummus.createWriterToModify(
'myfile.pdf',
{modifiedFilePath:'modifiedCopy.pdf'});
var pageModifier = new hummus.PDFPageModifier(pdfWriter,0);
var cxt = pageModifier.startContext().getContext();
cxt.drawCircle(
centerX,
centerY,
radius,
{
type:stroke,
width:1,
color:'black'
});
pageModifier.endContext().writePage();
pdfWriter.end();
General documentation - https://github.com/galkahana/HummusJS/wiki
If the tests fail, check that an "output" folder exists next to the script being executed, and that there are permissions to write there.
I am converting different images and pdf files with "gm" module for nodejs. Image types go successfully but when I want to convert PDF to image have problems. I need to covert only one selected page from pdf file to jpg/png. If I pass whole pdf file to "gm" it saves to image only first page, but I cannot find the way to save another page.
gm(file).toBuffer(format.toUpperCase(),
function (err, buffer) {
// so in buffer now we have converted image
}
Thank you.
You can use gm.selectFrame like this
gm(file).selectFrame(0).toBuffer() // To get first page
gm(file).selectFrame(1).toBuffer() // To get second page
// for only first pdf page use:
gm(file, 'pdf.pdf[0]').toBuffer(...)
// for only second pdf page use:
gm(file, 'pdf.pdf[1]').toBuffer(...)
There is spindrift for manipulating pdf (includes image conversion).
You can define your pdf using (You don't have you use all of the commands):
var pdf = spindrift('in.pdf')
.pages(7, 24)
.page(1)
.even()
.odd()
.rotate(90)
.compress()
.uncompress()
.crop(100, 100, 300, 200) // left, bottom, right, top
Later on convert to image:
// Use the 'index' property of an image element to extract an image:
pdf.extractImageStream(0)
If you have to use gm, you can do what #Ben Fortune suggested in his comment and split the pdf first.