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It would be nice if NI can provide Reset to default Values for settings in Vision assistant for many functions for e.g., Shape Detection etc. Currently either the developer should be getting default values from context help or delete the fuction and add it again.
I don't know if anyone else has requested this: It would be great if VA kept a track of the Template folder and Image file folder separately. I have to constantly load new templates and images and the program only remembers the last folder used, which means constantly navigating.
Binned images are very useful for reducing processing time when you are looking at the entire image. It would be very useful to have a function that would perform binning on an image to generate a new image. The binning factor could be anywhere from 2x2 to 32x32 or even larger. I would be happy with powers of two, but any integer value would be even more useful. Different values for the X and Y binning would also be useful. The values could be simply added together and divided by a user specified divisor, much like the filter options. It would be similar to the existing IMAQ Block Statistics, but the output would be a new image ready for processing.
Right now, binning can be accomplished by multiple steps - filtering with the appropriate size filter, then using IMAQ Extract to reduce the size of the image. This is much slower and less efficient than a single binning function would be, since the filter must be applied to every pixel, instead of just the pixels you are keeping. It could be done in place on the original image if desired.
When we create some geometries like circle, rectangle etc. in Custom Overlay step, we can not arrange the thickness of that geometry. We can not make something to be more apparent with changing the thickness.
The worst part comes out when you try to save/log an image while working with a high resolution camera. It is quite visible in VBAI Image Display window, but when you look at a logged image, you can not see any overlays because it has very small thickness(probably 1 pixel).
So, I think this feature can be added very easily and can help us create better visualization.
When working with LabVIEW Files, there are two ways to get the File Path back from the File Refnum -- one is to use the Close File function (which takes Refnum in and returns Path out) and the other is to use the Refnum to Path function (which I didn't know existed until today).
However, this very convenient "inverse transform" is not present in the NI Vision for AVI2 Files -- IMAQ AVI2 Close doesn't return the Path, and the Refnum to Path function won't accept an AVI Refnum as an input. Assuming that the original Path information is contained in the DLL at the time that AVI2 Close is called, please return it (as a Path or as a String) when the AVI is close. Alternatively, provide an AVI2 function (perhaps an extension to the existing IMAQ AVI2 Get Info) that returns the File Path.
Many times in computer vision, specifically when applied to field of robotics, it may be useful to perform an affine perspective transform on an image based on the robot's roll, pitch, and yaw angles coming in from an IMU. These VI's can be used to project input images into naider view which were originally taken at some alternate roll, pitch, and yaw angle. Applications include improved object recoginition, gimbal replacement, and more accurate visual servoing.
I am using NI Myrio FPGA to do image processing. With the help of NI Vision Assistant 2014, i am able to get the image from usb webcam. I want to use FPGA to convert the image to HSV. However the functions provided in NI Vision Assistant only allow me to get either H, S, or V image at once.
In order to solve it, i try to create one more FIFO to store the image. Here is my FPGA coding.
However, I do not know how to access these FIFO. Here is Labview coding.
All these coding are actually generated by NI Vision Assistant and i cant find where can specify which FIFO i am accessing. Any can help me?