I'm trying to make a program in LabVIEW to adjust the brightness of an image.
I'm increasing the brightness by adding a specific value to every red, green and blue value.
I get that value by my moving the slider.
I have made the program with the formula node but it always gives an error.
I hoped you can help me.
Block diagrams:
Error:
Error on line 6 is marked by a '#' character: "...Blue; int truncate(#int value); new"
There's a function for this shipped with LabVIEW it's called hilite color:
(this image is a snippet that you drag and drop directly to your VI block diagram)
Ton
Correct me if I am wrong, but I though it was not possible to use C-like functions inside Formula Node. You'd need to use LabVIEW to limit the range. I've attached the screenshot of the equivalent code, but I am sure there's a more efficient way of changing image brightness.
Related
I was translating a Java sketch to a Python sketch in Processing. It is using the P3D engine and it is not showing anything in the window while it is showing what I want in Java mode. When I run it just shows a blank black window instead of a grid. I can change its background color but I can not draw in the shapes or something window. Please help me! And I can not share its code as it is not an open source project.
It was my fault. It was a mistake in the code. I was making the grid using for loop and the variables that were needed for for loop were not defined properly it was not giving an error because the value of variables was 0. Sorry for wasting your time. Enjoy!
It seems not possible to view the exact margin between font-elements in XD (dev-view). Below you'll find a screenshot of a situation where we need to measure the exact distance between two Font-elements (XD developer-view).
It needs to bypass the line-height, but it doesn't. To be able to do this, we need the line-height to be zero. But when we edit the line-height in XD for a word or sentence on a single row, XD does not change that line-height.
Anybody encountered the same situation?
In this example the line-height is 32. We go to XD. Change it to zero, save it and SHARE FOR DEVELOPMENT. But the line-height remains 32. Also changing it to 1 instead of zero won't make any difference.
To fix this issue, you have to select the Text within Adobe XD. Right Click and select Path > Convert to Path. The margins around the Text will disappear and when in DEVELOPMENT view it becomes possible to see the right margin. A small problem remains. When you want to edit the text when it's a shape, you have to delete it and place a new text and turn it into a shape again. the text when converted to a shape
The default selector in Adobe XD will not give you the exact margin between two text. You have to convert the text layer into paths (Convert to Outlines) to get the exact margin.
But remember after converting text layer into path the text cannot be edited because now the letter are separate vector shapes.
To convert text layer into Path, select the layer and goto Object>Path>Click Convert to Path
You can use the Guides to drag one below your text and another one on top of the second text, and then you can see the distance between the 2 guides.
Check this youtube video for a quick tutorial on it. This is going to be a manual action. I don't think there's a key to press to check the distance automatically.
In Windows 7 and Windows XP you can find the "Window Color and Appearance" dialog under "Control Panel\Appearance and Personalization\Personalization".
Changing "Color1" of item "3D-Border" will result in a change of the following entries in the registry key
[HKEY_CURRENT_USER\Control Panel\Colors]
containing the resulting rgb-values:
Group1 (same values):
InactiveTitle, AppWorkspace, ButtonShadow, Graytext
Group2 (same values, different to those of group1):
Scrollbar, ButtonHilight
Does anyone know how these value are being calculated from the given rgb-values of "Color1"?
After searching the web without results and playing around with many values I did not happen to find a plausible way of how to do this.
Does anyone know the rules for this?
Any help would be appreciated.
I uploaded some demo values, systematically dealing with values in the lower parts. Also a text file comparing the affected registry key [HKEY_CURRENT_USER\Control Panel\Colors] after change of Color to Red (255 0 0).
When you set the "3D Border" color to red, it changed the "Button Face" color to red and interpolated this color to generate various lighter and darker shades of red, which were used to set some related color values.
The point is to create a consistent-looking theme with minimal effort. All you need to do is set the "base" color for 3D objects, and all of the other colors are automatically calculated to ensure that objects have the appropriate 3D appearance.
Some of these values, like the highlight and shadow colors used for 3D objects, are not directly configurable from the control panel applet. However, they can be set manually in the registry, and you can call the SetSysColors function to update currently running applications.
Why do you think you need to know the actual algorithm that Windows is using? What problem are you trying to solve? What are you going to use this information to do?
I do not imagine that the exact algorithm is documented anywhere. The code has been part of the OS since at least Windows 95.
I'm trying to calculate the actual size needed for uicontrols in a GUI so the GUI can resize itself appropriately. My problem is that the Extent property of a uicontrol is only the text area, and I can't find a way to determine the size of the surrounding control (such as the down arrow in a popup or the margin of an edit control). Is there a way to get the size of the decorations on a control?
I saw this related question on MATLAB Answers, which looked like it ended with no solution as well.
Edit:
For example, I want to calculate how big this popup should be to avoid cutting off the contents:
uicontrol('style', 'popup', 'string', {'a long string'})
Extent only tells me how big "a long string" is, and I still don't know how big to make the popup. I want a way to determine how much extra space is needed on the user's display (without assuming which OS or font sizes they use).
You can use get(hObject,'extent') to find out how much space the string contained in the uicontrol takes up. You can see if this is larger than the uicontrol's position.
The uicontrol Position property gives you the height and width of the bounding rectangle for the control. This has always worked for me. Is there a control where this property does not provide enough information?
If the GUI you're building can be assembled exclusively from Java components, you can use MATLAB's Java integration to create and drive a window using Java Swing components (all from M-code). That sidesteps the problem entirely, since the Java layout managers can do UI layout properly.
I have a QCView that loads a Quartz file which gives you iSights feedback (basically like a QTCaptureView)
Everything displays fine
The button simply takes a snapshot using the following simple lines of code
- (void)takePicture:(id)sender {NSImage *currentImage = [outputView valueForOutputKey:#"ImageOutput"];
[[currentImage TIFFRepresentation] writeToFile:#"/Users/hendo13/Desktop/capture.tiff" atomically:NO];}
The exported image however has some very wonky colouring issues like so:
http://kttns.org/gjhnj
No filters of any sort have been applied. Does anyone know what is causing this?
It's inverted. You can use the CIInvert filter to correct it (assuming there's no way to correct the actual output of the QC view).
Oh, and I think the blue and green alpha channels are the wrong way around, too (possibly an endianness problem?). If you go with the CIInvert solution, you can use CIColorMatrix to rearrange the channels, swapping blue and green back to their proper places. Here's a tutorial I wrote for it—I wrote it for the user interface in Core Image Fun House, but using it programmatically shouldn't be too hard once you understand how the filter works.