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Questions tagged [omr]

OMR (Optical Mark Recognition or optical mark reading) is the process of capturing human-marked data from document forms such as surveys and tests.

OMR (Optical Mark Recognition or optical mark reading) is the process of capturing human-marked data from document forms such as surveys and tests.

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Wikipedia

73 questions
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How to crop tilt image in c#

I have tilt image capture by mobile. I want to cut section/portion of image in between two rectangles of both sides to find out circles in between them. I have all 4 co-ordinates of middle section like (x0,y0),(x1,y1),(x2,y2),(x3,y3). My Image is…
Aamir
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Unexpected metadata type found in active-android

For a unknown reason Android Studio Fail to build my Project . First time it show me Error:Could not resolve all dependencies for configuration ':app:debugCompileClasspath'. Could not load module metadata from…
Faisal Mohammad
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OpenCV - Detecting handwritten mark of checkboxes from questionnaire

I'm working on a lot of patient intake questionnaires. Here is a scanned example of the Questionnaire. I need to process them and stored into the database, but I had a problem in detecting these handwritten marks: Patient Intake Questionnaire …
Ling
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Remove circles using opencv

I'm working on opencv problem to figure out which circles are filled. However, sometimes edge of circles are cause of false positive. It makes my wonder if I can remove these circles by turning all pixels white that have high R value in RGB. My…
user1146904
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Scikit image color filtering and changing parts of image to array

I want to do some Optical Mark Recognition using scikit-image. I am looking for 2 functions Lets say I have an image that looks like this: The way I would detect it is using filters to clean the image: (ie bilateral and Gaussian filtering for noise…
user3084006
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Determining the location of staves in sheet music

I want to be able to determine the location of staves in sheet music. Example: https://i.stack.imgur.com/EXPSo.jpg The sheet music could be scanned and so could be skewed, have gaps etc. I've spent some time researching various methods (the Hough…
Nick
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Scanning or reading an image containing optical marks on answer sheets using iphone/ipad

What is the best way to get started with OMR processing in iOS? I need to scan an answer sheet containing marked ovals and process the results using an iphone/ipad? I am new to this so any help would be…
megha
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Detect All Circles in an image (Optical Mark Recognition) using Python OpenCV

I need to make a OMR detection system using Python for my High School Vacation Project(which potentially might be used by the school to some extent if it is reliable enough) , I have done quite a bit of research on it , and have tried out everything…
Manav Sengupta
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Finder pattern for detecting image alignment markers

I am looking for an algorithm that can detect image alignment markers similar to the way QR codes use square markers on 3 corners to align and orient. I intend to use this solution to perform image normalization within the boundaries of the markers.
Bandwagoner
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OMR bubble sheet scanner using python opencv

I'm working on OMR bubble sheet scanner, detecting the correct bubbled answers using python openCV. While executing with the below code I am not getting the answers correctly. Could anyone please go through the code and let me know where I did a…
Lohith
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Opencv not finding all contours

I'm trying to find the contours of this image, but the method findContours only returns 1 contour, the contour is highlighted in image 2. I'm trying to find all external contours like these circles where the numbers are inside. What am i doing…
Bruno Brito
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Optical Mark Recognition in javascript for cross plateform mobile app

I'd like to build an exam correction app. From a paper multiple choice question (mcq) I'd like to use my camera to analyse it and get a score. This exist in python…
Damien Romito
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Detect OCR marker

I am working on optical mark recognition problem. I found Region of Interest(ROI) where student's roll number to be filled.Which approach can help me to decode filled circle value? i tried to code but it's not functioning properly. Images In this…
Pandey Rashmi
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Perspective Transform OMR Sheet - OpenCV Python

I am trying to make a perspective transformation with OpenCV in python. I want to align the image and find the coordinates of top left top right and bottom left and bottom right contours. here is my code so far where I can identify all the…
rnative
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Best mobile development language for OMR?

I want to make app like zipgrade for my school project. This app works with server but i want to make it works locally. I found some apps about OMR written by python. I found a framework kivy for making android app but this framework has bad…
Beyza NULL Mert
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