Morphological operation result is not displayed after applying Laplacian of Gaussian on the image.

Hello ! i have to apply morphoogical operation on the biomedical image...when i apply Laplcain of gaussian before the morphological operation then result is just a black image......what is the problem in this code.

    img_BlueRation=imread('imgage');% img_BlueRation is the input image
    Gauss_filter = fspecial('gaussian',[13,13],4.0); 
    img_Gauss = imfilter(img_BlueRation,Gauss_filter,'symmetric', 'conv');

    Laplac_filter = fspecial('laplacian'); 
    img_LOG = imfilter(img_Gauss,Laplac_filter,'symmetric', 'conv');

    struc_Element=strel('disk',3,8)
    img_MorphoOpen=imopen(img_LOG,struc_Element);
    img_MorphoClose=imclose(img_MorphoOpen,struc_Element);
    figure;
    imshow(img_MorphoClose,[]);

Answer 1

[Image Analyst]

It worked for me when I used cameraman.tif. Try casting to double right after you read it in:

img_BlueRation = double(img_BlueRation);

[Tahir]

for camerman image...it will work...but for my image it will not...because my image is medical image having fine details.

.

[Image Analyst]

Maybe everything got filtered away. Post your image if you want me to try it.