How to find length, width,edges of rice in this image??

Answer 1

[Image Analyst]

See my Image Processing Tutorial in My File Exchange

Answer 2

[Mark Sherstan]

Use the Image Processing Toolbox and this code:

I = imread('download.jpg');
I = rgb2gray(I);
BW = imbinarize(I);

stats = regionprops(I)

You can retrive the results from the structure in stats. Alternatively you could use the Image Region Analyzer app which is also part of the toolbox:

[Jasleen Kaur]

rice named image exists in my laptop but it gives error, i dint know why

[Mark Sherstan]

You have an extra space at the end of your string. Also please confirm that the image and your script are in the same directory.