Create image with black and white patterns

[Nghtcrwlr]

Hello

With the attached VI I am able to create an image which is completely black ( or white or any color according to values in color palette). See picture1.

Is it possible to create an image like Picture 2 and picture 3  Or any other form which consists of black and white patterns? I need an image with black and white regions which a camera can recognize.

Thanks for any help.

[mikeporter]

Yeah, there are a lot of ways, what exactly are you trying to do?

Mike...

[Nghtcrwlr]

i need to create a template image that looks like Picture2.

[Mark_Yedinak]

Do you need to do it programmatically or do you just need the image? Simple monochrome imagess are fairly easy to create. If you use a 2D Boolean array that is the same dimensions are your graphic simply set the bits you want black to True.

[mikeporter]

Use a 2D picture control functions to draw what you want and then save it as the proper file type.

Picture to Pixmap.vi converts the picture to a standard image format, Write to PNG File.vi will save that image to disk.

Mike...

PS: the files you posted said JPG, but they were really PNGs

[Nghtcrwlr]

Image as in Picture 2 has to automatically generated.

Yes mike. That was a mistake. Actual images have to be in PNG format.

[mikeporter]

Automatically generated based on what? The drawing functions could put a black rectangle wherever you want it.

Mike...

[Nghtcrwlr]

Hello Mike

I tried to draw a Black rectangle in a white IMAQ image. See the attached VI. I found a VI in a forum that converts IMAQ Image to picture ( https://decibel.ni.com/content/docs/DOC-20071)  and then i added the Draw Rect.vi from picture controls to draw a rectangle. But now i have a few problems. The IMAQ image being saved is white but it is not being read. The color to RGB vi should also work with a white image, right?  OR do i  need to convert it to 8/16bit image before converting to RGB?

See attachment

[mikeporter]

Where exactly are you getting the error that you mention on the block diagram of your code? What is the error?

If all you need is a black rectangle drawn on a 500x500 white background, why bother with the IMAQ drivers at all?

Mike...

[Nghtcrwlr]

Hi Mike

I cant open your vi. ( am having 2011 version) . But i managed to get the required result in another way. May b its not a perfect approach , but it works. 

I created an IMAQ white image ( PNG format). Then read the PNG file and convert it to picture. Then draw the rectangle and convert it back to IMAG PNG format.

I need the IMAQ drivers bcos later in the VI i need it for other purposes.

See Screenshot

Thanks anyway