Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Detecting if a B\W BitMap image is Inverted

Posted on 2013-11-21
6
Medium Priority
?
255 Views
Last Modified: 2014-02-25
I have a C# .Net application that is converting a BitMap to a Byte[] but need to determine whether the Bitamp is inverted, if so then I need to invert is back.

Can anyone help me with some code examples of both determining whether an image is inverted and invert it back?
0
Comment
Question by:csalerno
6 Comments
 
LVL 45

Expert Comment

by:AndyAinscow
ID: 39668347
>>but need to determine whether the Bitmap is inverted......determining whether an image is inverted

If you do not know somehow (eg. pixel 0,0 is always white in the original so you can test that one pixel in your image) then I would say you are not going to be able to do this task.
0
 
LVL 43

Expert Comment

by:Rob
ID: 39668403
Can't be done. As had been said you don't know what state the image is in ie inverted or normal
0
 
LVL 31

Accepted Solution

by:
Zoppo earned 2000 total points
ID: 39668611
Hi csalerno,

where does the bitmap come from? If you load it from a file it may be (i.e. if its a TIFF file) the bitmap has a palette which may indicate black-on-white or white-on-black with the order of the colors in the table.

Beside this I have to agree with the previous comments. The only additional thing which comes in my mind is you could simply count the white and black pixels, if you i.e. have more black than white pixels you can treat it as inverse allthough of course you can't be sure it really is.

ZOPPO
0
Become an Android App Developer

Ready to kick start your career in 2018? Learn how to build an Android app in January’s Course of the Month and open the door to new opportunities.

 
LVL 45

Expert Comment

by:AndyAinscow
ID: 39884806
so, was it a TIFF file ?
0
 
LVL 43

Expert Comment

by:Rob
ID: 39884816
And I'd say we all deserve a few points eh?
0
 

Author Comment

by:csalerno
ID: 39885443
it was a tiff or a PDF
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
Whether you've completed a degree in computer sciences or you're a self-taught programmer, writing your first lines of code in the real world is always a challenge. Here are some of the most common pitfalls for new programmers.
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…

564 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question