how to save binary image

[nadiah]

Hello everyone.

How to save binary image in a computer? If I right click on the image, then choose 'Save Image...', the picture saved will appear blank. I understand the image is in 0 and 1 but I do not know how to set up the code.

Thank you.

[M.Siddeq]

Right click==>Save Image 

works perfect 

[nadiah]

If I right click and save image, the image will appear black.. 

[M.Siddeq]

I don't know about yours, but mine works absolutely perfect 

[BruceAmmons]

The image is saving correctly, but like you say it looks black.  Standard viewers do not rescale the pixel intensities.

If you want a black and white image, you need to increase the value of the brighter pixels before saving.  One trick I use is multiplying the image by 255, which turns all the non-zero pixels into the brightest possible pixel.  There are probably more efficient methods, such as a lookup table, but multiplying is quick and dirty.

Bruce

[AdnanZ]

Bruce is right. Here is a discussion on this:

http://forums.ni.com/t5/Machine-Vision/How-do-you-write-an-image-threshold-to-a-file/td-p/93172

[nadiah]

Hi Bruce.

I am not sure how to do the multiplication by 255. You mean multiply the whole program by 255 or just multiply the image?

Thanks.

[BruceAmmons · Accepted solution]

Use IMAQ Multiply to multiply the image times 255.

Bruce

[MRocky]

hi can plz help me out.....i want to show grayscale images into Bitmap (0-7 bits). Is it possible to show garyscale image into bitmap 1 bit, 2bit,..upto...7bit image.

[MRocky]

hi can plz help me out.....i want to show grayscale images into Bitmap (0-7 bits). Is it possible to show garyscale image into bitmap 1 bit, 2bit,..upto...7bit image.