CODEWITHSUNDEEP
javaimagearraylistgrayscale
Rohit Rajagopal
Rohit Rajagopal

Reputation: 82

create a grayscale image with an array of values

I have a single dimensional array with 8 values. I want to create a grayscale image with those values. The image consist of a square with provided width and length. inside that square i want to produce circles with array values. The values from the array will be the radius of the circles. I need a grayscale image of that circle. Any help???

Upvotes: 2

Views: 375

Answers (1)

Mark Setchell
Mark Setchell

Reputation: 207550

You can use ImageMagick for this, either directly from the commandline or from C/C++, Perl, Python, PHP etc.

Start with convert to get a white square 100pixels by 100pixels.

convert -size 100x100 xc:white circles.jpg

Change colour or file extension as you wish, e.g.

convert -size 200x200 xc:black circles.gif

Now add two circles with centre 50,50

convert -size 100x100 xc:white \
    -draw "circle 50,50,60,50" \
    -draw "circle 50,50,70,50" \
    circles.jpg

The \ is just a line continuation.

Back at my desk now.... so, here is a command:

#!/bin/bash
convert -size 400x400 xc:white  -fill transparent \
   -stroke gray90  -draw "circle 200,200,260,200" \
   -stroke gray80  -draw "circle 200,200,280,200" \
   -stroke gray70  -draw "circle 200,200,300,200" \
   -stroke gray60  -draw "circle 200,200,320,200" \
   -stroke gray50  -draw "circle 200,200,340,200" \
   -stroke gray40  -draw "circle 200,200,360,200" \
   -stroke gray30  -draw "circle 200,200,380,200" \
   -stroke gray20  -draw "circle 200,200,400,200" \
    circles.jpg

and the result:

enter image description here

Maybe you can execute it in Java with:

Runtime.exec(...)

Upvotes: 1

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