Image Inversion: TestInvertIm.m - File Exchange

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Highlights from
Image Inversion

[invIm]=InvertIm(im, varargin... InvertIm generalized image inversion (grayscale reversal)
Example.m
TestInvertIm.m
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from Image Inversion by Stead Kiger
InvertIm inverts an image array im in the sense of reversing its grayscale (NOT matrix inversion)

TestInvertIm.m

% TestInvertIm
fmt='%s\t%6i\tInverse\t%6i\n';

cls='uint8';
fprintf('\n\n\n%s\n',cls)
x=uint8(0);
fprintf(fmt,cls,x,InvertIm(x))

x=uint8(128);
fprintf(fmt,cls,x,InvertIm(x))

x=uint8(255);
fprintf(fmt,cls,x,InvertIm(x))


cls='uint16';
fprintf('\n\n\n%s\n',cls)
x=uint16(0);
fprintf(fmt,cls,x,InvertIm(x))

x=uint16(intmax('uint16')/2);
fprintf(fmt,cls,x,InvertIm(x))

x=uint16(intmax('uint16'));
fprintf(fmt,cls,x,InvertIm(x))


cls='uint16 using 12 bits';
fprintf('\n\n\n%s\n',cls)
x=uint16(0);
fprintf(fmt,cls,x,InvertIm(x,12))

x=uint16(255);
fprintf(fmt,cls,x,InvertIm(x,12))

x=uint16(4095);
fprintf(fmt,cls,x,InvertIm(x,12))

x=uint16(intmax('uint16')/2);
fprintf(fmt,cls,x,InvertIm(x,12))

x=uint16(intmax('uint16'));
fprintf(fmt,cls,x,InvertIm(x,12))


cls='int8';
fprintf('\n\n\n%s\n',cls)
x=intmin('int8');
fprintf(fmt,cls,x,InvertIm(x))

x=int8(0);
fprintf(fmt,cls,x,InvertIm(x))

x=int8(128/2);
fprintf(fmt,cls,x,InvertIm(x))

x=int8(128);
fprintf(fmt,cls,x,InvertIm(x))


cls='int16';
fprintf('\n\n\n%s\n',cls)
x=intmin('int16');
fprintf(fmt,cls,x,InvertIm(x))

x=-int16(intmax('int16')/2);
fprintf(fmt,cls,x,InvertIm(x))

x=int16(0);
fprintf(fmt,cls,x,InvertIm(x))

x=int16(intmax('int16')/2);
fprintf(fmt,cls,x,InvertIm(x))

x=int16(intmax('int16'));
fprintf(fmt,cls,x,InvertIm(x))



cls='int16 using InvertIm lowerlimit 0';
fprintf('\n\n\n%s\n',cls)
x=intmin('int16');
fprintf(fmt,cls,x,InvertIm(x,[],0))

x=-int16(intmax('int16')/2);
fprintf(fmt,cls,x,InvertIm(x,[],0))

x=int16(0);
fprintf(fmt,cls,x,InvertIm(x,[],0))

x=int16(intmax('int16')/2);
fprintf(fmt,cls,x,InvertIm(x,[],0))

x=int16(intmax('int16'));
fprintf(fmt,cls,x,InvertIm(x,[],0))



cls='Double';
fmt='%s\t%5.3f\tInverse\t%5.3f\n';
fprintf('\n\n\n%s\n',cls)
x=0;
fprintf(fmt,cls,x,InvertIm(x))

x=0.5;
fprintf(fmt,cls,x,InvertIm(x))

x=1;
fprintf(fmt,cls,x,InvertIm(x))

fmt='%s\t%5.3f %5.3f %5.3f\tInverse\t%5.3f %5.3f %5.3f\n';
x=[0 128 255];
fprintf(fmt,cls,x,InvertIm(x))

fprintf(fmt,cls,x,InvertIm(x,[],[],129))

Highlights from Image Inversion

Highlights from
Image Inversion