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MATLIP: MATLAB-Like Language for Image Processing
Pin-Chin Huang ([email protected])Shariar Zaber Kazi ([email protected])
Shih-Hao Liao ([email protected])PoHsu Yeh ([email protected])
Motivation• Easy to code Easy to access pixels of an image Easy to do image arithmetic operation Easy to do image convolution Easy to assign images of any size Easy to debug
• No cost for license
• Good Portability
Easy to access one pixel of an image
function = main() image x; x=imread("./rabbit.jpg"); print(x[1,1,"RGB"]);end
public static void main(String[] args){BufferedImage x = imnew(100, 100, "RGB");x = imread("./rabbit.jpg");System.out.println(getImagePixel(x, 1, 1, "RGB"));}static int getImagePixel(BufferedImage im, int col,
int row, String channel){
…………………………
}
26 lines of java code
Easy to do image arithmetic operation
function = main() image x; image y; x=x+1; x=x-1; x=x*1; x=x/1; x=x+y;end
public static void main(String[] args){BufferedImage x = imnew(100, 100, "RGB");BufferedImage y = imnew(100, 100, "RGB");x = imread("./rabbit.jpg");x = (BufferedImage)clone((BufferedImage)doArithmetic(x, 1, OPERATION.ADD));x = (BufferedImage)clone((BufferedImage)doArithmetic(x, 1, OPERATION.SUB));x = (BufferedImage)clone((BufferedImage)doArithmetic(x, 1, OPERATION.MUL));x = (BufferedImage)clone((BufferedImage)doArithmetic(x, 1, OPERATION.DIV));x = (BufferedImage)clone((BufferedImage)doArithmetic(x, y, OPERATION.ADD));}static Object doArithmetic(Object op1, Object op2, OPERATION op){……………}static Object clone(Object src){……………………}
150 lines of java code
Easy to do image convolution
function = main() image x; kernel k; x=x@k;end
public static void main(String[] args){BufferedImage x = imnew(100, 100, "RGB");Kernel k = kernelinit();x = (BufferedImage)clone(convolve(x, k));}static BufferedImage convolve(BufferedImage im, Kernel k){………………….}static Object clone(Object src){…………………….}
45 lines of java code
Easy to assign image to image of different size
function = main() image a; image b; a = imnew(300,300,"RGB"); b = imnew(200,200,"RGB"); a=b; end
public static void main(String[] args){BufferedImage a = imnew(100, 100, "RGB");BufferedImage b = imnew(100, 100, "RGB");a = imnew(300, 300, "RGB");b = imnew(200, 200, "RGB");a = (BufferedImage)clone(b); }static BufferedImage imnew(int width, int height, String type){…………..}static Object clone(Object src){………………………}
50 lines of java code
Easy to debug
function = main() int i; for i=0:(int y):100 x=x+1; end y=0;end
syntax error in line #3Fatal error: exception Parsing.Parse_error
Fatal error: exception Failure("Type mismatch in argument passing between: 'x', type: int and 'x', type: float in function: 'test'“)
function int m = test (int x) endfunction = main () float x; x=1.0; test(x);end
Easy to debug
function int m = test () endfunction = main () int x; x=1; test(x);end
Fatal error: exception Failure(“Wrong number of arguments passed to function: ‘test’”)
Fatal error: exception Failure("Cannot concatenate image type with string type in function: 'main'")
function = main() image x; imshow(x); x = imread("./rabbit.jpg"+x); imshow(x); imsave(x,"./rabbit.jpg"); x = imnew(300,300,"RGB"); imshow(x);end
No cost for licenseImage Processing Toolbox 6.2 (MATLAP)• Individual License
For: End userActivation types: Standalone named user or designated computer
• $1,000• Buy
Request a Quote (via fax or e-mail)Contact Sales
• For an end user who wants to personally install, administer, and operate the software.
• Group License For: WorkgroupActivation Types: Standalone named users or designated computers
• Request a Quote (via fax or e-mail)Contact Sales
• For organizations who would like to designate an administrator to manage a group of Individual licenses.
Tutorial introduction
• Variable declaration and assignment:int a;float b;boolean c;kernel k;image i;function = main()a=1;b=0.1;c=true;k=kernelnew(10,10);k=[0.0,0.1;0.3,0.4];i=imnew(10,10,”RGB”);end
int a=3;float b=0.3;boolean c =true;Kernel k=kernelnew(10,10);Image i=imnew(10,10,”RGB”);
Arithmetic Operation
Int a;Int b;float c;float d;funciton = main()a=a+b;a=a-b;a=a*b;a=a/b;a=a^b;a=mod(a,b);c=c+d;c=c-d;c=c*d;c=c/d;end
image a;image b;int c;function =main()a=a+b;a=a-b;a=a*b;a=a/b;a=a*2+b;a=a*c+b;a=a*2.0; (NOT OK)a=2*a;(NOT OK)end
kernel k1;kernel k2;float a;function = main()k1=k1+k2;k1=k1-k2;k1=k1*k2;k1=k1/k2;k1=k1*2.0+k2;k1=k1*a+k2;k1=k1*2+k2;(NOT OK)k1=2.0*k1+k2;(NOT OK)end
Control Flow Statement
int x;function=main()x=1;If x==1 x=x+1;elseif x==2 x=x+2;elseif x==3 x=x+3;else x=x+4;endend
int x;funciton=main()x=1;If x==1 x=x+1;endend
Int x;function=main()x=1;if x==1x=x+1;elseif x==2x=x+2;end
Int x;function=main()x=1;if x==1x=x+1;else x=x+2;end
Control Flow Statement
function = main()int x;int i;for i=0:1:10 x=x+1;endend
function = main()Int x;while x<3 x=x+1;endend
Function
function = test()end function main()test();end
function main()Int d;d=test();Endfunction int m= test()end
function int m= test(int x) m=d;end function main()Int d;d=test(d);end
Recursion
function int m = foo (int x) if(x > 0) m=foo(x-1); else m=-1; endendfunction int m = bar (int x) m=x+1;endfunction = main() print(foo(bar(foo(5))));end
Example (Flip the image vertically)
Example (Flip the image vertically)
function image ret = flip(image im)int height;int width;int i;int j;height = getheight(im);width = getwidth(im);ret=imnew(width,height,"RGB");for j=0:height-1 for i=0:width-1 ret[i,height-j-1,"rgb"]=im[i,j,"rgb"]; endendend
function = main() image x; image y; x=imread("./rabbit.jpg"); imshow(x); y=flip(x); imshow(y); end
Example (Flip the image vertically)
Example (Flip the image horizontally)
function image ret = flip(image im) int height; int width; int i; int j; height = getheight(im); width = getwidth(im); ret=imnew(width,height,"RGB"); for j=0:height-1 for i=0:width-1 ret[width-i-1,j,"rgb"] = im[i,j,"rgb"]; end endend
function = main() image x; image y; x=imread("./rabbit.jpg"); imshow(x); y=flip(x); imshow(y);end
Example (Flip the image horizontally)
Example (Blur the image)
function = main() image x; image y; kernel k; k= [0.25,0.0,0.25;0.0,0.0,0.0;0.25,0.0,0.25]; x=imread("./rabbit.jpg"); #x=togray(x); imshow(x); y=x@k@k@k@k@k@k@k; imshow(y); imsave(y,"./r3.gif"); end
Example (Blur the image)
Example (Sharpen the image)
function = main() image x; image y; kernel k; k= [0.0,-1.0,0.0;-1.0,5.0,-1.0;0.0,-1.0,0.0];
x=imread("./rabbit.jpg"); imshow(x); y=x@k@k; imshow(y); imsave(y,"./r4.gif");end
Example (Sharpen the image)
Example (Inverse the image)function = main() image x; int i; int j; int width; int height; x=imread("./rabbit.jpg"); width=getwidth(x); height=getheight(x); imshow(x); for j=0:height-1 for i=0:2:width-1 x[i,j,"R"] = 255-x[i,j,"R"]; x[i,j,"G"] = 255-x[i,j,"G"]; x[i,j,"B"] = 255-x[i,j,"B"]; end end imshow(x);end
Example (Inverse the image)
Example (Rotate the image 900)function image ret = rotate90(image im) int height; int width; int i; int j; height = getheight(im); width = getwidth(im); ret=imnew(height,width,"RGB"); for j=0:height-1 for i=0:width-1
ret[height-j-1,i,"rgb"] = im[i,j,"rgb"]; end endendfunction = main() image x; image y; x=imread("./rabbit.jpg"); imshow(x); y=rotate90(x);end
Example (Rotate the image 900)
Edge Detection
kernel k;int i;int j;function image m=edge(image b,kernel k) imshow(b); b = b@k; for i=0:getheight(b) for j=0:getwidth(b) if b[j,i,"grey"] < 0 b[j,i,"grey"] = -b[i,j,"grey"]; end end end imshow(b); imsave(b,"./lena_edge.jpg");end
function = main() image a; image b; a = imread("./lena_color.jpg"); b = togray(a); k = [-5.0, 0.0, 0.0; 0.0, 0.0, 0.0; 0.0, 0.0, 5.0]; edge(b,k); end
Edge Detection
Architectural diagram
Lesson learned
• Whenever changes are made, do regression test immediately.
• Try to come up with a complete test suite before language design
• Use Version Control System• Try to finish the grammar before
implementation