Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Get pixel color of a jpg in a TImage

Posted on 2013-11-07
1
Medium Priority
?
3,158 Views
Last Modified: 2013-11-19
Hi Experts,

I need to get the pixel color of a jpg image inside of TImage. How can I do this ?

Something like this:

var
  pixel_color    : TColor;
begin
  pixel_color := Image1.Canvas.Pixels[0, 0];
end;

But this code only works to BMP image.

I am using Delphi Xe4

Thanks for some help
Alexandre
0
Comment
Question by:alpires
1 Comment
 
LVL 28

Accepted Solution

by:
Sinisa Vuk earned 2000 total points
ID: 39632236
Here is small example:
var
  jpeg: TJPEGImage;
  bmp: Tbitmap;
begin
  jpeg := TJPEGImage.Create;
  try
    jpeg.LoadFromFile('c:\test.jpg');
    bmp := Tbitmap.Create;
    try
      bmp.PixelFormat := pf24bit;
      bmp.Width := jpeg.Width;
      bmp.Height:= jpeg.Height;
      bmp.Assign(jpeg);
      //access pixel
      ShowMessage(IntToHex(Cardinal(bmp.Canvas.Pixels[1, 1]), 8));
    finally
      bmp.Free;
    end;
  finally
    jpeg.Free;
  end;

Open in new window

0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

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

How to remove superseded packages in windows w60 or w61 installation media (.wim) or online system to prevent unnecessary space. w60 means Windows Vista or Windows Server 2008. w61 means Windows 7 or Windows Server 2008 R2. There are various …
Having just graduated from college and entered the workforce, I don’t find myself always using the tools and programs I grew accustomed to over the past four years. However, there is one program I continually find myself reverting back to…R.   So …
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
Suggested Courses

926 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