How can I compress a ppm file using JPEG compression with 66% ?

Hi

I have written following line

a = imread('Barbara_orig.ppm');
imwrite(a,'Barbara_orig.jpg','Quality',66, 'jpeg');

But it shows following error:

Error using imwrite>parse_inputs (line 558)

Invalid input syntax or unrecognized format "Quality".

Error in imwrite (line 418)

[data, map, filename, format, paramPairs] = parse_inputs(varargin{:});

Error in Untitled3 (line 2)

imwrite(a,'Barbara_orig.jpg','Quality',66, 'jpeg');

Answer 1

[Walter Roberson]

imwrite(a, 'Barbara_orig.jpg', 'Quality', 66);