image processing - OCR on antialiased text -


I have an OCR table from a PDF document. I wrote simple Python + OpenCV script to get personalized cells. After that new problem was born. Text is antialiase and not good quality. Tesert recognition rate is very low I have tried to preprocess images with adaptive thresholding but the results were not very good I have tried the trial version of ABVY Finner, and in fact this is exactly the output But I do not want to use non-free software I wonder if a preprocessing problem Or it is prohibited to write and learn other OCR systems.

If you look closely at your antialiase text samples, you will see that the edges There are many red and blue ones:

Increased view of antialized text

It indicates that your computer is being antialiasing inside, which is used to optimize the results for your LCD monitor

If so, at high resolution Removing At should be fairly easy. For example, you can use imagemagic to extract pictures from PDF files on 300 dpi like a command line: 

  convert-density 300 source.pdf output.png   
 You can try loading PDFs in your favorite viewer and copying text directly to the clipboard.  
 
  Appendix:   
 I tried to convert my sample text back into my original pixels and apply the scaling technique described in the comments. Here are the results:  
 Original image: 
 original image  
 After applying 300% scaling and simple threshold: 
 Scale and threshold image  
 After smart scaling and thresholding: 
 smart scale and threshold image  
 As you can see, some letters are still something wrong, but I think it's a bay to read it with Tessaract Level opportunity.

Comments

Post a Comment

Popular posts from this blog

c - Mpirun hangs when mpi send and recieve is put in a loop -

I was trying to use the program to use mifrewan on 4 node clusters. Distributing node 0 data in nodes 1, 2 and 3. In the program, from '90 'to variable values ​​of' dior 'to be calculated. Therefore the node is distributing data and collecting results in an omitted fashion (for different values ​​of var 'dir') when do {*******} Whereas (dir Loop is given, Mippun is hanging, and no output is found. But when I comment on two {*******} (dir The loop output is obtained for the initial value of variable dir dir = -90 ), and that output is correct. The problem occurs when the loop is given. Can anyone help me in solving this problem. #include "mpi.h" int main (int argc, char * argv []) Float dir = -90; Int rank, nanoprakash; MPI_Status status; MPI_Init (& amp; argc, & argv); MPI_Comm_rank (MPI_COMM_WORLD, & amp; Rank); MPI_Comm_size (MPI_COMM_WORLD, & amp; numprocs); If (rank == 0) {/ / data to begin / / (dest = 1; dest ...
Read more

python - Apply coupon to a customer's subscription based on non-stripe related actions on the site -

I can not find anything in the source about using coupons after subscribing to a user's plan. Is it possible to use a coupon to credit a user's membership after initial subscription? If not, what is the best option? Specifically, I want to give a user 100% coupon for that month, when they take 5 [site specific actions]. This is possible, but may not be the best idea. Coupons are currently applied to the stripe, then apply again at the customer level and each client can have a single coupon. So if you are already offering discounts to the coupon, then the customer who is currently in the present will also give up. It also means that if you are using a recently-added multiple subscription capacity, then all of the user's subscription will be ready for the month. Coupons can be set to "Once", only once (as the only name) can be used by any customer, so if this credit can earn more than once, You will have to maintain a 100% discount coupon continuousl...
Read more

java - Unable to get JDBC connection in Spring application to MySQL -

मैंने स्प्रिंग में डीबी कॉन्फ़िगरेशन का पालन किया है: & lt; bean id = "dataSource" Class = "org.apache.commons.dbcp.BasicDataSource" नष्ट-विधि = "बंद" & gt; & Lt; प्रॉपर्टी नाम = "url" मान = "jdbc: dburl" / & gt; & Lt; संपत्ति नाम = "driverClassName" मान = "com.mysql.jdbc.Driver" / & gt; & Lt; संपत्ति नाम = "उपयोगकर्ता नाम" मान = "उपयोगकर्ता नाम" / & gt; & Lt; संपत्ति नाम = "पासवर्ड" मान = "पासवॉर्फ" / & gt; & Lt; प्रॉपर्टी नाम = "हटाए गए हटाए गए" मान = "सही" / & gt; & Lt; गुण नाम = "प्रारंभिक आकार" मान = "3" / & gt; & Lt; संपत्ति नाम = "अधिकतमअक्टिव" मान = "5" / & gt; & Lt; / सेम ​​& gt; डीबी से गुण मूल्यों को लोड करने के लिए अतिरिक्त कॉन्फ़िगरेशन। & lt; bean id = "config1" class = "org.apache.commons.configuration....
Read more