I am using php vips library. I want to readImage from filename in vips. I want to know that
$imagick->readImage() in php Imagick and
Vips\Image::newFromFile($arg[1])
both are same? If no then is there any method in vips which is similar to `$imagick->readImage()
Related
I'm working with Visual Studio and OpenCV for image processing, but all my documents are PDF so I need to convert them to image format so I can compatibilize them with OpenCV
This is my code to open a image:
enter image description here
Is there any way to modify it to open and read PDF's as an image?
Many thanks!
You may want to take a look at ImageMagick. The CLI tool is able to convert PDF to images and I believe they provide C libraries too.
I would like to download normal webpages, webhosted ppt and pdfs in python. However, to minimize that amount of data that I would need to download, I would like to download just the text and ignore any images.
This sounds feasible with normal websites, I'm not sure if its possible for ppt and pdfs. How can I accomplish this?
I'm planning to use the textract module to extract the content of these pages after downloading them, but I'd be interested to know if there are alternatives that would make my problem easier to solve.
Take a look at the textract library. This accomplishes pretty much all your requirements, ie, html, pdf and ppt.
I need to process multi-page PDFs that are scanned in to me using a program I wrote in C++ using OpenCV libraries. OpenCV does not read in PDFs, so I am currently using pdftk to break up the PDF, and convert -density 300 page##.pdf page##.png to convert the individual pages to PNGs before reading them in with my program.
The issue is convert takes about 30 seconds on my Raspberry Pi to do this conversion. Is there an easier way to convert multi-page PDFs in a way that can be read in my C++/OpenCV?
You can try converting PDF to PNG with
http://www.foolabs.com/xpdf/
https://github.com/coolwanglu/pdf2htmlEX (it convert PDF to html, but do generate png as images corresponding to each page, which can be used)
Is it possible to convert a PDF file to cv::Mat?
I know that PDF file is generally vector of objects, but given a required resolution. Is there any tool that can do such a conversion?
OpenCV doesn't support pdf format at all, so you should convert pdf page to image using another library. Read this discussion: Open source PDF library for C/C++ application?
Also this question is similar to yours: What C++ library can I use to convert a PDF to an image on windows?
I am using Coldfusion to view images stored in the file system and I can READ the EXIF metadata of JPEGs, but I'd like to know if it is possible to modify this information and re-save the image.
I know that there are XMP and IPTC custom tags out there, I googled now and seems that javaloader.cfc + some java lib are your only sure option.
EDIT: Since I work on stock photography application I got interested and found this command line tool which could do the trick:
http://www.sno.phy.queensu.ca/~phil/exiftool/