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OMR marking from a phone photo

Print the sheets, photograph the filled ones, check what was read, and the scores are in Test Results. No scanner and no separate software.

Tutors & institutions12 min read
Before you start
OMR marking is part of the Exam hall. Create the exam and add the paper first, then open the paper's OMR button, or the OMR marking tab and choose the paper. The tab walks you through five steps.

Overview

  1. Set up the sheet: how many questions, four or five options, and the marking scheme.
  2. Enter the answer key.
  3. Print the sheets: one per candidate with their name and roll number already filled in, or blank ones.
  4. Read the filled sheets: photograph them and check each result on screen.
  5. Results: ranks and averages, then send the scores to Test Results.

1. Set up the sheet

SettingAllowedExample
Questions1 to 100, on one sheet90
OptionsA to D, or A to EA to D
Marks for a right answerAbove 0, up to 100, two decimals4
Minus for a wrong one0 to 100, two decimals1 (JEE/NEET style), 0.25, 0.66, or 0 for none

The number of questions and options fix the sheet's layout, so they can't change once any sheet has been marked. The marks can change at any time; every saved sheet is re-marked.

2. The answer key

Two ways to enter it:

  • Click: each question has a row of A, B, C, D (and E) and a Bonus option. The button reads N left to fill until every question has an answer, then Save key.
  • Paste: type or paste the whole key into Or paste the whole key, in order. Spaces, commas and lower case are all fine: abcd abcd, A,B,C,D and ABCDABCD are the same. Press Fill from pasted key, check it, then Save key.

Bonus (* when pasting) means every candidate gets that question's marks whatever they filled, including nothing. Use it for a question you drop because it was wrong or ambiguous.

3. Printing sheets

  • One per candidate: each sheet has the candidate's name printed and their roll number already written and bubbled. There is nothing to mis-bubble and no sheet to match up by hand. This is the one to use when you know who is sitting.
  • Blank sheets: for walk-ins and spares. The candidate writes and bubbles their four-digit roll number (the digits after your prefix).
Print at actual size, on plain white A4
In the print dialog choose A4 and Actual size or 100%, not Fit to page. A slightly scaled sheet still reads, but actual size is what the sheet was designed for. Don't print on coloured paper, and don't photocopy a photocopy: the black corner squares must stay solid.

Every sheet carries a small row of black squares along the bottom: a code for this paper. If a Maths sheet is photographed while you are marking Physics, it is caught and refused rather than marked against the wrong key.

What candidates do

The sheet prints its own instructions:

  • use a black or blue ball-point pen and fill the circle completely;
  • write the roll number in the boxes and fill the matching circles (already done on a pre-filled sheet);
  • fill one circle per question; two filled circles count as wrong;
  • don't fold, staple or write near the black squares.

A tick, a cross or a dot in the circle is not a filled circle. Brief candidates on this before the paper.

4. Reading filled sheets

  1. Press Take a photo to use the phone's camera, or Choose photos or scans to pick many at once (from the gallery, or JPG and PNG files from a scanner).
  2. Each photo is read in turn. You see the photo with what was read drawn on it, the candidate it was matched to, all the answers, and the score.
  3. Check it, correct anything, then Save and next. Or Skip this sheet.
  4. At the end you are told how many were saved and skipped.

Photos are read on your device. The photo itself is never uploaded or stored; only the answers are saved.

Taking photos that read first time

  • All four black corner squares in the picture. This matters more than anything else.
  • Sheet flat on a table, not held in the hand. A dark or wooden table is fine.
  • Even light: daylight or a room light, no strong shadow across the sheet, and no flash glare on it.
  • Straight above is best, but some angle, tilt or rotation is fine. So is a sheet upside down or sideways: it is turned the right way round automatically.
  • The sheet can be as small as about half the photo. Closer is better.

If a photo can't be read, you are told why, for example:

MessageWhat to do
Couldn't find the four black corner squaresRetake with all four corners in the frame, sheet flat.
Too dark or too washed outMove to better light; avoid the flash.
The orientation mark beside the top-left corner is missingIt isn't one of our sheets, or that corner is covered.
Printed for a different paperYou are marking the wrong paper: switch papers at the top of the tab.

Checking what was read

On the photo:

  • Green rings: the answer read for each question.
  • Amber rings: a faint mark, or a second smudge in the same row (often a changed answer). The darker mark is taken, but look at it.
  • Red rings: two or more filled circles on one question.
  • Blue rings: the roll-number digits read.

Beside the photo, Candidate is chosen from the roll number on the sheet, and says what it read. If the roll number couldn't be read, or isn't in this exam, choose the candidate from the list. If that candidate already has a marked sheet, you are warned that saving replaces it.

The answer grid shows every question. Amber ones are the ones to check. Click any answer to change it: it cycles through the options, then blank (–), then two-marked (*). The score updates as you go.

When a sheet won't read

A torn, folded or smudged sheet may never photograph well. Open A sheet won't read? Type its answers instead, choose the candidate, and type the answers in order: a letter for each, - for blank, * for two marked. Spaces are ignored. It is saved and scored exactly like a scanned sheet, and labelled typed in the results.

How a sheet is scored

On the sheetScores
Matches the key+ marks for a right answer
Doesn't match− the penalty
Two or more circles filledCounts as wrong: − the penalty (as NEET and most coaching tests treat it)
Left blank0
A Bonus question+ marks for a right answer, for everyone

Example, +4 / −1, 20 questions: 15 right, 2 wrong, 1 double-marked, 2 blank = 15 × 4 − 3 × 1 = 57. The score is worked out on the server from the saved answers and the key, never taken from the phone.

5. Results and Test Results

The Results step shows how many are marked, how many candidates have no sheet, the average and highest score, and a ranked table. Equal scores share a rank. Each row shows right, wrong and blank, whether any answers were flagged for checking, and whether it was typed. A sheet can be deleted from its row.

Send to Test Results puts the scores where report cards read them:

  • one test per batch sitting the exam, named Exam · Paper, out of the paper's total (questions × marks per question);
  • each candidate's score as their mark, and anyone without a sheet marked absent, never zero;
  • the tests stay hidden from students until you release them in Test Results.
Whole marks only in Test Results
Test Results keeps whole marks from 0 to the total. With negative marking a score can be 22.68 or −2, so it is rounded (22.68 becomes 23) or entered as 0, and every such change is listed after sending, and noted privately on the mark for you. The exact score stays on the OMR results table.

Sending again, after a correction, updates the same tests rather than creating new ones.

Correcting a key or a sheet

  • Wrong key: fix it and save. Every sheet already marked is re-marked immediately, and you are told how many.
  • Dropping a question: set it to Bonus in the key.
  • A misread sheet: photograph it again, or type it; the new one replaces the old.
  • Already sent to Test Results? Send again after the correction.

What it can't do

  • It reads only sheets printed from tuition.in. Sheets from another supplier won't read.
  • One sheet is up to 100 questions. For a 180-question paper, split it into two papers.
  • It reads photos and JPG or PNG scans, not PDF files. Most scanners can save as JPG.
  • It isn't a high-speed sheet feeder: each sheet is photographed and confirmed on screen, one at a time. Picking a batch of scans at once saves the photographing, not the checking.
  • It reads filled circles, not written answers. For those, use AI grading on subjective answers.

Privacy

Photos never leave the device they were taken on. Saved answers and scores are visible only to the exam's owner until they are sent to Test Results and released there.

Questions

Does it work on a phone?
Yes, in the phone's browser: Take a photo opens the camera, and photos already in the gallery can be picked with Choose photos or scans.

A student bubbled the wrong roll number.
The sheet shows the number it read and says it isn't in the exam, or matches the wrong person. Choose the right candidate before saving. Pre-filled sheets avoid this entirely.

Can I change the number of questions after marking?
No, because saved answers are laid out for the old sheet. Delete the marked sheets first.


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