Legacy ImageMagick Discussions Archive

Hi every one, Iam trying to read paths of images from a text file and load them into wands...im getting a status problem...can anyone please help me with it and i want to write all images with a different file name ..im trying something like this... int main(int argc,char **argv) { MagickWand *magic...

The problem is that you have to pass "rgb(a,b,c)" as a string so anything inside the string is not interpreted as variables. But you could use sprintf to create the string and then pass that. e.g. char rgb_string[64]; . . . sprintf(rgb_string,"rgb(%d,%d,%d)",a,b,c); PixelSetColo...

Hi everyone... Iam trying to use PixelSetColor() in my program..i have a doubt ..can i give variables instead of numbers is the second argument like rgb(a,b,c) [in which r,g,b values are stored in a b,c] instead of rgb(0,255,0)...Iam attaching my code here...When i use variables its not working... a...

Maay be you can use cmyk(100,100,100,10) instead of r,g,b(0,0,255)

Hi everyone... Iam trying to use PixelSetRed(),PixelSetGreen(),PixelSetBlue() functions...to change the r,g,b of a particular pixel...iam storing the actual r,g,b values in an array and manipulating them and then trying to produce an image with the modified values...I divided the image into sub-imag...

Hi Everyone,

Can any one please explain me how can i store the r,g,b values of a image..by sub-image wise in a 2d array using image magick...?

Lets say an image is of 15x15..i have to store the r,g,b values in 2d array by 5x5 sub-images...wise.

PixelGetNextIteratorRow sets that variable to the number of pixelwands that it returns. In this case I only asked for one pixel and it's in the middle of the image so it can't return zero. In the general case though you would have to check the value of x after calling PixelGetNextIteratorRow to mak...

This code reads the built-in logo: image and changes the pixel at 200,100 to red. [EDIT] I've modified the code to use Region Iterator, as in my original version, or to use a DrawingWand as suggested by Anthony. Pete // Change the colour of one pixel in the logo: image // using either DrawPoint or ...

anthony wrote:Perhaps it should be included in IM sources as a basic example demo.

I think you should....it definetly helps a lot of people...

Thank you very much el_supremo This code reads the built-in logo: image and changes the pixel at 200,100 to red. [EDIT] I've modified the code to use Region Iterator, as in my original version, or to use a DrawingWand as suggested by Anthony. Pete // Change the colour of one pixel in the logo: image...

Hi everyone,

Is there any way with which i can directly access a pixel at a given x,y position in magickwand and change the color of that particular pixel to red.

Here is a simple unix bash script that will create a 1D horizontal gradient and put 3 different rgb colors at different locations as specified from a text file. Save the following as a file called whatever you want. I used test_changecolor #!/bin/bash # define file of colors and positions infile=&q...

fmw42 wrote:A shell script will allow you to program the changes using the IM command line commands

Thankyou..can u provide an example please..iam novoice in shell scripting.

Hi everyone...

I want to change the color of pixel at given x,y position in the image. i want to change all 3 r,g,b values. Can anyone please explain how can i do this in C language with Imagemagick...

Thanks in advance.

I presume you have a 1D image of RGB values in some standard format such as gif or tiff or png, etc. And you want to replace some pixels with different colors at specific locations. There are several approaches. The easiest or most efficient may be to just draw those colored pixels at the locations...