pixel

How to edit pixel values of an image in Java. Is there any method to change pixel values? For example: BufferedImage image = ... image.setRGB(x, y, 0); From documentation : void setRGB(int x, int y, int rgb) //Sets a pixel in this BufferedImage to the specified RGB value. In BufferedImage : public void setRGB(int x, int y, int rgb) Sets a pixel in this BufferedImage to the specified RGB value. The pixel is assumed to be in the default RGB color model, TYPE_INT_ARGB, and default sRGB color space. For images with an IndexColorModel, the index with the nearest color is chosen. http://download

I am trying to calculate the pixel width of Excel columns, as described in this post , using the official formula from the OpenXML specification. However, in order to apply this formula, I need to know the Maximum Digit Width of the Normal font, which is the pixel width of the widest numeric digit. The OpenXML specification gives this example as a clarification: Using the Calibri font as an example, the maximum digit width of 11 point font size is 7 pixels (at 96 dpi). I have checked that this is correct by visually examining a Calibri 11-point digit and it is indeed 7 pixels wide. So, I am

What are the most commonly used pixel sizes (primarily widths) and what are there advantages and disadvantages? How can I best find a happy medium to give a good experience to people with a wide variety of monitor sizes? An answer with an explanation rather than just the size would be greatly appreciated. the most grids use a width of 960px. (When the design has a fixed width). When you take a look at global statistics 1024 range resolutions are still the most common: http://gs.statcounter.com/#resolution-ww-monthly-201006-201106 Do not use 1000 width. (You have to count in the border width of

There is this image comparison code I am supposed to modify to highlight/point out the difference between two images. Is there a way to modify this code so as to highlight the differences in images. If not any suggestion on how to go about it would be greatly appreciated. int width1 = img1.getWidth(null); int width2 = img2.getWidth(null); int height1 = img1.getHeight(null); int height2 = img2.getHeight(null); if ((width1 != width2) || (height1 != height2)) { System.err.println("Error: Images dimensions mismatch"); System.exit(1); } long diff = 0; for (int i = 0; i < height1; i++) { for (int j

Is it possible to specify the pixel unit in code. What I mean is, say I have a layout and I want the size to be 20dp, then is there any way to do so without writing in a layout xml Ted Hopp In a view: DisplayMetrics metrics = getContext().getResources().getDisplayMetrics(); float dp = 20f; float fpixels = metrics.density * dp; int pixels = (int) (fpixels + 0.5f); In an Activity, of course, you leave off the getContext() . To convert from scaled pixels ( sp ) to pixels, just use metrics.scaledDensity instead of metrics.density . EDIT: As @Santosh's answer points out, you can do the same thing

I have a window that designed at WPF and I used that on center of a WinForms owner. Now, I want to move the owner form and at the moment my WPF window has also to be moved in the center of the form! But I have a problem, Only when window is in the center of the form that form in the center of the screen. And otherwise act in a different form than the Windows coordinates. I just add the displacement values of the form to window location. Now I have come to the conclusion that the coordinates of the pixels on WPF Windows are different by WinForms! How to convert WPF window location to WinForms

I would like to know how i can select a pixel with a mouse click in an image (QImge) and get pixel position and value. Thanks Jared self.image = QLabel() self.image.setPixmap(QPixmap("C:\\myImg.jpg")) self.image.setObjectName("image") self.image.mousePressEvent = self.getPos def getPos(self , event): x = event.pos().x() y = event.pos().y() xioxox First you have to draw the image. You can do this my making a QLabel widget and call setPixmap . You need to convert your QImage to QPixmap before doing this (you can use QPixmap.fromImage(img) ). You can get mouse clicks by subclassing the QImage and

I'm wanting to do something like the following: ... pixel[0,0] = [ 254, 0, 0 ] # Draw R at pixel x0y0 pixel[2,1] = [ 0, 254, 0 ] # Draw G at pixel x2y1 pixel[4,2] = [ 0, 0, 254 ] # Draw B at pixel x4y2 ... I hope to display many different configurations of pixels and colours in a short space of time -- writing to an intermediary file would be too expensive. How should I best go about achieving this goal in Python? hamstergene Direct answer: This can only be done with OS-specific APIs. Some OSes does not allow changing pixels on the screen directly. On Windows, you can use pywin32 libraries to