Image quality is enhanced

[ymadhuri@rediffmail.com]

Hi

When I tried to run the attached program it shows the following error.

Error -1074396080 occurred at IMAQ Extract Single Color Plane

Possible reason(s):

IMAQ Vision: Invalid image type.

My input image is also attached.

Please help me debug.

[TiTou · Accepted solution]

Look, you define your 3 images as "grayscale U8" type, then you read a colour image (your png file attached) and then try to extract a colour pane from it... I bet that if you put a probe just after the "IMAQ ReadFile"the image will be in graysclae, and if you use a "Extract Colour Pane" on a grayscale image, it's understandable that you get an error.

Image 1 need to be allocated as a colour image ; then instead of using twice the "image copy" maybe just linking a graysclae buffer to the "image dst" input of the "extract colour pane" will make it easier.

Look at this, I've re-worked your VI a bit, I think it works as you expect : 

Hope this helps

[ymadhuri@rediffmail.com]

Thank you for your kind response.

Can you attach the modified vi.

[TiTou]

I think it's best if I don't, you should read my diagram, try to understand it, ask question if something is not clear for you and then try to fix your VI without looking at my diagram. If you succeed in this it will mean you learnt something.

good luck!

[ymadhuri@rediffmail.com]

Thankyou very much. My deepest gratitude for your timely help.

I tried the code you suggested. It worked as I expected. I did a little modification. When I run the program , the acquired image is displayed but nothing appears in the next display. No errors are shown.

I did not understand what could be the reason. 

[ymadhuri@rediffmail.com]

Hi,

I don't know why, but the program is giving an output when it is selected in dilate mode but no output appears in erode mode.

And the when the displayed output in dilate mode is observed it shows different output contrast in successive images.

As the input image is constant should'nt the output image also be stable without flickering?

[TiTou]

very interesting question, it shows that there is still a little thing that you're missing with image ref, I'll try to explain...

[TiTou]

that will teach me to not do my homework... not too sure about the flickering image but surely if you understand well what I've tried to explain to you then you'll be able to solve it yourself!

Enjoy.

[ymadhuri@rediffmail.com]

Your teaching methodology is excellent. The way you explained the code step by step is very helpful for beginners like me.

It actually creates more interest  towards labview programming. Thankyou very much.

After removing the IMAQ Equalize the image is more clear. But the flickering effect, I dont know how to solve it. My College project dead line is nearing.So I cannot spend more time trying to identify the cause. As the image quality is good I am going to ignore the flickering effect for now.

[TiTou]