after IMAQ threshold.vi,GRAYSCALE U8 type image turns into a completely black image.

[tuming]

i want to threshold the u8 image after equalize.vi,but the result is the image turns into a completely black image.before equalize.vi,i use histogram.vi and the interval is (0,0).where is the wrong?i really appreciate your help.

[muks]

Most likely you have not defined the buffers correctly. Right click the image go to pallete and view as Grayscale. Does this show the image?

[tuming]

you are the one who always help me,really thank you muks.when i change it to binary,i can see the image.the initial choice is grayscale.

[muks]

Can you post a screenshot of your vi?

[rpursley8 · Accepted solution]

Unless you input a value into the 'Replace Value' input of IMAQ Threshold, your output pixel values will be 0 and 1.  In a grayscale image, you will not be able to see anything.  Try setting the 'Replace Value' input to 255 and see if the data shows up.  Below is a note from the help file on this function.

Note  Use a binary palette when you plan to visualize an image to which a threshold has been applied in Replace mode. However, which palette to use for visualization depends on the value of Replace Value. For example, the visualization of a threshold image could be performed with a gray palette. However, in this case it is advised that you use a replacement value of 255 (white) to see the threshold image better.

[tuming]

thank you rpursley8,the problem was solved with your help.really thank you.

[tuming]

according to rpursley8's guidance,the problem is solved.thank you muks.

[rpursley8]

Your welcome.  This is a common mistake.  I do it about every other time I use this function.