there is a bmp file which has a black background and has a red blot(dot) in the middle.....how can i find the coordinates of the red dot.... any code ll be appreciated....
: hi all.... : : there is a bmp file which has a black background and has a red blot(dot) in the middle.....how can i find the coordinates of the red dot.... : any code ll be appreciated.... : : Thanks : Ranjit :
Its very easy. Fistly you have to understand the format of a bitmap. You can follow to the link below posted by Lundin.
i do understand the format but and i can check the color red by searching for 0xff 0x00 0x00....i dont know where the coordinates will be....thats where i need some example code to find the coordinates of that point....
The location of the red dot, you can determine from the image Height and Width. Once you find your Red dot, save its x position (Width position) and y position(Height). Then from there you will have the cordinate of the Red dot.
Comments
:
: there is a bmp file which has a black background and has a red blot(dot) in the middle.....how can i find the coordinates of the red dot....
: any code ll be appreciated....
:
: Thanks
: Ranjit
:
Its very easy. Fistly you have to understand the format of a bitmap. You can follow to the link below posted by Lundin.
http://www.wotsit.org/
Read and try to understand the format of a bitmap.
How many colors is your bitmap?
Loco
i do understand the format but and i can check the color red by searching for 0xff 0x00 0x00....i dont know where the coordinates will be....thats where i need some example code to find the coordinates of that point....
Thanks
Ranjit
the bmp is of 24 bits sir
Thanks
Ranjit
:
: the bmp is of 24 bits sir
:
:
: Thanks
: Ranjit
:
I would suggest you convert the image to 16 bit(Save as 16 color using Windows Paint program). It will be much easier to work with 16 bit.
In 16 bit Images a byte represents 2 pixels;
Click on this link and you will find a code written in C/C++ that draws the 16 bit image using Turbo C/C++ graphics.
http://writeka.com/emage/bmp16_format.html
The location of the red dot, you can determine from the image Height and Width. Once you find your Red dot, save its x position (Width position) and y position(Height). Then from there you will have the cordinate of the Red dot.
Loco.