How do I get the raw data from the .png file?

Question

5.00/5 (1 vote)

See more:

I want to display a gray 3D picture. How can i get the raw data from the gray image like a.png and b.png? thank you very much!

Posted 1-Mar-15 21:16pm

Member 11486310

Updated 12-Jul-22 15:54pm

SoMad

Add a Solution

Comments

enhzflep 2-Mar-15 6:13am

Which OS are you using?

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

bonezegei · Answer 1 · 2022-07-12T15:54:00

Solution 5

Try using

stbi_image

you can download it and include to your project, its a header file it support multiple image formats

Posted 12-Jul-22 15:54pm

bonezegei

Comments

merano99 13-Jul-22 16:22pm

nice, my 5!

As an example of image processing, the loaded image is converted to gray and saved to disk.The example shows how to iterate over image data and how to access and change the pixel values.
https://solarianprogrammer.com/2019/06/10/c-programming-reading-writing-images-stb_image-libraries/#basic_usage

KarstenK · Answer 2 · 2015-03-04T07:00:00

Solution 1

You can load the png into a memory dc and access and manipulate the bit directly. Some sample code you should find the great article CxImage.

Posted 4-Mar-15 7:00am

KarstenK

merano99 · Answer 3 · 2022-07-12T12:50:00

Solution 4

I would suggest using a library like libpng if you want it to be platform independent.
It's also easier on Windows, e.g. with Loadimage().

www.libpng.org/pub/png/libpng.html

docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-loadimagew

Posted 12-Jul-22 12:50pm

merano99