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问题 My .png images show up im Qt Creator and also when i build my project in both debug and release situations. When I try to deploy my exe and run it my images don't show up. My .pro file: QT += core gui multimedia multimediawidgets greaterThan(QT_MAJOR_VERSION, 4): QT += widgets TARGET = WinSim TEMPLATE = app DEFINES += QT_DEPRECATED_WARNINGS SOURCES += main.cpp\ mainwindow.cpp HEADERS += mainwindow.h FORMS += mainwindow.ui RESOURCES += \ resourcefile.qrc win32:RC_ICONS += icons\uokicon.ico My

问题 I am using ImageMagick to programmatically reduce the size of a PNG image by reducing the colors in the image. I get the images unique-colors and divide this by 2. Then I assign this value to the -colors option as follows: variable = unique-colors / 2 convert image.png -colors variable -depth 8 I thought this would substantially reduce the size of the image but instead it increases the images size on disk. Can anyone shed any light on this. Thanks. EDIT: Turns out the problem was dithering.

问题 I'm planning to make a colored overlay to put over a map of my city. However I want the overlay to only be semitransparent. I know about rgba values and how the a value is what determines the transparency, but when working with the BufferedImage class, I can only assign one color to one pixel. Lets say you're given two images of the same size. How would I go about overlaying one over the other with the overlay having only half the opacity as the original image. 回答1: Modify the alpha channel

问题 i followed this link to screenshot my webview completely. It works fine. But I have an issue. The screenhot that I get from the webview contains white spaces on the top and bottom of the picture? How do I get rid of this? Kindly let me know. This is the code that I've used for capturing from webview. IF YOU LOOK PROPERLY THERE IS WHITESPACE BOTH AT THE BOTTOM AND TOP PARTS OF THE IMAGE. public static String saveCapturedImageToSdCard() { Picture picture = WebViewActivity.sWebViewEx

问题 i followed this link to screenshot my webview completely. It works fine. But I have an issue. The screenhot that I get from the webview contains white spaces on the top and bottom of the picture? How do I get rid of this? Kindly let me know. This is the code that I've used for capturing from webview. IF YOU LOOK PROPERLY THERE IS WHITESPACE BOTH AT THE BOTTOM AND TOP PARTS OF THE IMAGE. public static String saveCapturedImageToSdCard() { Picture picture = WebViewActivity.sWebViewEx

问题 I needed to be able to convert different image formats to the .PNG format. With the help of some others, I was able to make that happen. The only issue is, I also need to be able to convert .BMP files to .PNG without the use of ImageMagick. Here is the code I used for the conversion of other files: <?php $filename = "myfolder/test.jpg"; $jpg = @imagecreatefromjpeg($filename); if ($jpg) { header("Content-type: image/png"); imagepng($jpg); imagedestroy($jpg); exit; } ?> If anyone knows how I

问题 Are there good tools for checking PNG files for issues that can be how I have ended up here? At first i feared with was an issue with the many thousands of "tiles" in my learning app (at 3 resolutions), but it seems one or more specific png files have an internal issue. 回答1: pngcheck works well and is a good resource. In addition, an OS-X app (in the app store) called "Quick Opaque" easily stripped out the (unneeded) alpha channel data from my png file, which cured the IDAT problem. 来源： https

问题 Are there good tools for checking PNG files for issues that can be how I have ended up here? At first i feared with was an issue with the many thousands of "tiles" in my learning app (at 3 resolutions), but it seems one or more specific png files have an internal issue. 回答1: pngcheck works well and is a good resource. In addition, an OS-X app (in the app store) called "Quick Opaque" easily stripped out the (unneeded) alpha channel data from my png file, which cured the IDAT problem. 来源： https

问题 I know how to save an image with Bitmap.compress(), but I really want to save the image as a PNG with its alpha-transparency, and using Bitmap just kills my efforts. I can save it as a opaque PNG, but not as a transparent PNG file. Is there any approach to this? Thank you. 回答1: Try this out. I haven't tested it but it should work. Bitmap bitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888); OutputStream stream = new FileOutputStream("/sdcard/test.png"); bitmap.compress(CompressFormat

问题 I'm trying to modify graphic assets of the software I'm using (for aesthetic puroposess, I guess it's hard to do something harmful with graphic assets) but developer encrypted them. I'm not sure why he decided to do that since I used and modified a bunch of similar softwares and developers of those didn't bother (as I can see no reason why encrypting those assets would be necessary). So anyway here are examples of those encrypted graphic assets: http://www.mediafire.com/view/sx2yc0w5wkr9m2h