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问题 I'm using qr_flutter to create QrImage. It's ok but I would like to convert QrImage into image in order to create a PDF file to print on the printer. Please kindly help! QrImage( data: qrString, size: 300.0, version: 10, backgroundColor: Colors.white, ), 回答1: Use a RepaintBoundary widget with a key to export the widget to a a b64 string which then you can export as an image. Example: Future<Uint8List> _getWidgetImage() async { try { RenderRepaintBoundary boundary = _renderObjectKey

问题 I'm using qr_flutter to create QrImage. It's ok but I would like to convert QrImage into image in order to create a PDF file to print on the printer. Please kindly help! QrImage( data: qrString, size: 300.0, version: 10, backgroundColor: Colors.white, ), 回答1: Use a RepaintBoundary widget with a key to export the widget to a a b64 string which then you can export as an image. Example: Future<Uint8List> _getWidgetImage() async { try { RenderRepaintBoundary boundary = _renderObjectKey

问题 I need to shrink every image I get that is more than 10MB. File types are png, jpg and gif. I saw that ImageSharp has an option to resize an image: Resize(new ResizeOptions { Mode = ResizeMode.Max, Size = new Size(maxFileSize) } I saw a lot of examples using the resize function with width and height, but none using this one size option, and no documentation explain exactly what "size" means. I've tried the following: Shrinking an image of 22.2MB using maxFileSize=1024 yielded a picture of 527

问题 I am currently trying to make some TensorFlow Inference (C backend) using Boost::GIL (challenging). I need a few thinks, I have been able to load my png image ( rgb8_image_t ) and did a conversion to rgb32_f_image_t . I still need 3 thinks, the raw pointer of the data, memory allocated, and dimensions. for the memory allocated unfortunately the function total_allocated_size_in_bytes() is private, so I did this: boost::gil::view(dest).size() * boost::gil::view(dest).num_channels() * sizeof

问题 How do I take a image with just white and transparent pixels (example) and recolor to, say, red or orange, using only CSS? Question below was asked previously - Change color of PNG image via CSS? The answer says to use filters, but does not indicate what combination of filters would make it work. Are there any filter combinations that would allow me to change a white-on-transparent image to red? To clarify: I would like to recolor the white portion of the image , not color the background. For

问题 I have a button on a C# Windows Form form, and want to show an image and some text, side by side, and centered on the button. I tried aligning the image to the left and the text to the right, and I'm getting this (the periods are spaces): |[IMAGE}.................Text| But I want this: |........[IMAGE] Text........| My code looks like this: btnChangeStatus.Text = "Change status to SUPPRESSED"; btnChangeStatus.TextAlign = ContentAlignment.MiddleRight; btnChangeStatus.Image=Image.FromFile(@"J:

问题 I have tryed many codes, and looked at Android developers but couldn't make it work. I want the seek bar to adjust my bitmap image brightness 回答1: check the example given at Increase/Decrease Brightness of Image and do as shown below on seekbar progress changes int brightness; SeekBar seekbarbrightness=(SeekBar)findViewById(R.id.seekBar1); seekbarbrightness.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar arg0) { // TODO Auto

问题 I have tryed many codes, and looked at Android developers but couldn't make it work. I want the seek bar to adjust my bitmap image brightness 回答1: check the example given at Increase/Decrease Brightness of Image and do as shown below on seekbar progress changes int brightness; SeekBar seekbarbrightness=(SeekBar)findViewById(R.id.seekBar1); seekbarbrightness.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar arg0) { // TODO Auto

问题 I wish to add a border to the single strip of images, using FFMPEG. I have been trying to search this thing on google, I tried this command ffmpeg -i input.jpg -vf "draw box= : x=50 : y=10 : w=104 : h=80 : color=white" output.jpg, I am unable to increase the border size as well as my desired color,Its work only black border.how can I increase the border and change the color to the single strip of images. Can anybody help me? 回答1: Adding border to an existing image is similar to add water mark

问题 i have a webhosting that gives maximum memory_limit of 80M (i.e. ini_set("memory_limit","80M");). I'm using photo upload that uses the function imagecreatefromjpeg(); When i upload large images it gives the error "Fatal error: Allowed memory size of 83886080 bytes exhausted" What maximum size (in bytes) for the image i can restrict to the users? or the memory_limit depends on some other factor? 回答1: The memory size of 8388608 is 8 Megabytes, not 80. You may want to check whether you can still