contrast

问题 I have imported a project for an assignment and eclipse has decided to auto highlight parts which make them unreadable. I have looked in the text editor settings and found nothing matching this. 回答1: You are seeing that output because you (probably accidentally) selected Coverage As > Java Application instead of Run As > Java Application from the context menu for your project node in Project Explorer . Note that Coverage As is immediately above Run As in the context menu. The colors in the

问题 I am using the dummies package to generate dummy variables for categorical variables, some with more than two categories. testdf<- data.frame( "A" = as.factor(c(1,2,2,3,3,1)), "B" = c('A','B','A','B','C','C'), "C"= c('D','D','E','D','D','E')) # #Generate dummy variables: # testdf<- cbind(testdf, dummy(testdf$C, sep='_')) testdf<- cbind(testdf, dummy(testdf$B, sep='_')) For both commands I get: Warning message: In model.matrix.default(~x - 1, model.frame(~x - 1), contrasts = FALSE) : non-list

问题 I'm looking for a way to change the color of text to either #000 or #fff depending on the main color of a background image within a div called "banner". The background images are chosen at random on each page so I need to be able to do this automatically. I came across JavaScript color contraster but I'm struggling to understand how to use it properly. I notice the link I've posted gives a solution in javascript and I've also read about a possible solution in jquery. I'm clueless with

问题 I have a tool with trackbar slider controls used to adjust an image's brightness, contrast, gamma, etc. I am trying to get real-time updates to my image while the user drags the slider. The brightness and gamma algorithms are an acceptable speed (around 170ms). But the contrast algorithm is about 380ms. Basically my form is a tool window with sliders. Each time the image is updated, it sends an event to the parent which redraws the new image. The tool window keeps the original unmodified

问题 I'm working on an image stitching project, and I understand there's different approaches on dealing with contrast and brightness of an image. I could of course deal with this issue before I even stitched the image, but yet the result is not as consistent as I would hope. So my question is if it's possible by any chance to "balance" or rather "equalize" the contrast and brightness in color pictures after the stitching has taken place? 回答1: You want to determine the histogram equalization

问题 Hi I want to implement contrast filter in my application like this link or this contrast but with color matrix and track bar for value I already found color matrix for it float c = mytrackbar.value * 0.01f //maxTrackbarValue = 100, minTrackbarValue = -100 float t = 0.01f; cmPicture = new ColorMatrix(new float[][] { new float[] {c,0,0,0,0}, new float[] {0,c,0,0,0}, new float[] {0,0,c,0,0}, new float[] {0,0,0,1,0}, new float[] {t,t,t,0,1} }); but the result is very different. I try to change 0

问题 I've reviewed this thread on how to get the current status of the 'High Contrast Text' mode by calling : isHighTextContrastEnabled from within AccessibilityManager. See this thread: Detect if 'High contrast' is enabled in Android accessibility settings Is there a way one can use AccessibilityManager to enable the 'Hight Contrast Text' mode from within an application? Looking at the available methods I didn't see anything. 来源： https://stackoverflow.com/questions/37402880/enabling-high-contrast

问题 I realise this is a similar question to this Conditional CSS based on background color variable but I need to do it inside a loop in LESS. If a background colour is too dark I want to generate another class so I can make the text on top lighter but not sure how as I don't think you can use lighten and darken functions with hex colours...? Here is my LESS http://codepen.io/anon/pen/IlsJE?editors=110 .for(@i, @n) {.-each(@i)} .for(@n) when (isnumber(@n)) {.for(1, @n)} .for(@i, @n) when not (@i

问题 Im attempting to input my image to this method, but when i try to draw the image, it comes totally black. I tried inputing just one image and inputing the whole MNIST dataset. Same result. https://github.com/lisa-lab/pylearn2/blob/master/pylearn2/expr/preprocessing.py if GCN is True: trainingFolder = "../inputData/converted_training/GCN/" testingFolder = "../inputData/converted_testing/GCN/" img0 = (data[1,1:]).reshape((28,28)).astype('uint8')*255 im = Image.fromarray(img0) im.show() #GCN#

问题 Adjust the contrast of an image in C# efficiently solution for above question is not working in vb 2005 i need solution in vb2005 this is c# code below public static Bitmap AdjustContrast(Bitmap Image, float Value) { Value = (100.0f + Value) / 100.0f; Value *= Value; Bitmap NewBitmap = (Bitmap)Image.Clone(); BitmapData data = NewBitmap.LockBits( new Rectangle(0, 0, NewBitmap.Width, NewBitmap.Height), ImageLockMode.ReadWrite, NewBitmap.PixelFormat); unsafe { for (int y = 0; y < NewBitmap