png8 | wrapper around pngquant , pngnq and pngout for Mac OS X | Image Editing library
kandi X-RAY | png8 Summary
kandi X-RAY | png8 Summary
png8 is a commandline tool for OS X that converts 24-bit PNG images to 8-bit PNG. Most common graphic programs can't export to 8-bit PNG with alpha transparency even though it's by far the most useful file format for the web.
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QUESTION
I am trying to make sense of the following presentation, see page 27:
Could someone please describe the command line tools available in libjxl that can help me work with existing palettes ?
I tried a naive:
...ANSWER
Answered 2022-Mar-29 at 15:39The libjxl encoder either takes a JPEG bitstream as input (for the special case of lossless JPEG recompression), or pixels. It does not make any difference if those pixels are given via a PPM file, a PNG8 file, a PNG24 file, an RGB memory buffer, or any other way, if the pixels are the same, the result will be the same.
In your example, you have an image that is just solid white, so it will be encoded the same way regardless of how you pass it to cjxl.
Now if those pixels happen to use only few colors, as will be the case for PNG8 since there can be at most 256 colors in that case, the encoder (at a default effort setting) will detect this and use the jxl Palette transform to represent the image more compactly. In jxl, palettes can have arbitrary sizes, there is no limit to 256 colors. The --palette option in cjxl can be used to set the maximum number of colors for which it will still use the Palette transform — if the input image has more colors than that, it will not use Palette.
The use of Palette is considered an internal encoding tool in jxl, not part of the externally exposed image metadata. It can be used by the encoder to effectively recompress PNG8 files, but by no means will it necessarily always use that encoding tool when the input is PNG8, and it might also use Palette when the input has more than 256 colors. The Palette transform of jxl is quite versatile, it can also be applied to individual channels, to more or less than 3 channels, and palette entries can be not only specific colors but also so-called "delta palette entries" which are not a color but signed pixel values that get added to the predicted pixel value.
QUESTION
My code is the following in my component, I defined this:
...ANSWER
Answered 2022-Feb-10 at 02:04I've got modified a version of the documentation example to use what you've shared and it's working at https://stackblitz.com/edit/angular-3pnr1l with the TS/Angular versions you specified. It's ng-bootstrap 11.0 for what it's worth, but you hadn't specified that.
One difference in the implementation is the use of .
QUESTION
I have an application using ngx-leaflet, Leaflet for Angular, and I'm trying to do a L.titleLayer.wms
but adding an extra option to tileLayer.wms
. It looks likes this:
ANSWER
Answered 2021-Oct-11 at 22:59All I needed to do to get it to work is:
QUESTION
I need to generate 1000 images each with different numbers. Doing this is found a script online which works fine, but it doesn't work with 00 in front of the increments.
I can't just add 00 in front of every number because when it hits 10 it's doing 0010 instead of 010 like I want it to.
That means I need to change the code a bit. And it's probably REALLY basic, but I just can't figure it out. There is no log sadly, because I am running the script in Photoshop.
Here is the code I have trouble with. And underneath is the result:
...ANSWER
Answered 2021-Sep-24 at 09:18You can add the number to a string of zeroes, and then slice the resulting string based on desired length:
QUESTION
I made a GUI Application which looks like this:
The ones marked red are Tkinter Text widgets
and the ones marked yellow are Tkinter Entry widgets
After taking user input, the data is to be added to a PSD file and then rendered as an image. But Lets say, after taking the following data as input:
It renders the following Photoshop file:
How do I fix this issue that it does not recognize "\n"
properly and hence the rendered document is rendered useless.
Here is the code which deals with converting of the accepted user data into strings and then adding it to Photoshop template and then rendering it:
...ANSWER
Answered 2021-May-19 at 18:10There are 3 ways of expressing new line characters:
- MacOS uses
\r
- Linux uses
\n
- Windows uses
\r\n
Python and tkinter
use \n
but it looks like psApp.Application
uses \r
instead. That is why the document isn't rendered properly. For more info read the answers to this question.
QUESTION
I am using imageArcgisRest source and I need to filter data by ids in export layer API, ids can be in thousands. so get a request is not possible to do that. is there any way to request data as a post method with OpenLayers imageArcGisRest source?
here is my code of creating source:
...ANSWER
Answered 2021-Apr-21 at 18:53This setup works in a simple test (using a test browser because the sample server does not support CORS) to filter highways in the OpenLayers example https://openlayers.org/en/latest/examples/arcgis-image.html
QUESTION
I've been trying to parse through a large number of json files within subdirectories and search-replace the URLs/strings. No matter what I try I can't seem to get sed to actually make any changes within the files.
The strings must be in this format as it's what's required in the json files. My reasoning for this is there could be other image urls within other files with different tags I hadn't accounted for and therefore this would catch all basically.
In my current environment, I don't have jq and can't install it, but I could move these files somewhere else and use jq or python or whatever...
Here's the general structure of the files, I believe I am piping the correct files, just sed not playing nice.
...ANSWER
Answered 2021-Feb-10 at 08:00You may be overthinking. Please try instead something like:
QUESTION
I am rendering a few markers on my React JS application using HERE maps. On clicking a marker the map center changes to the clicked hub and map zoom increases. On clicking another marker the map location changes to the other marker. This change of map center should take place with a nice animation/transition but instead, the map center changes instantaneously without animation. I could not find any other way to do this. Here's what my map instantiation looks like:
Imported the below in index.js:
...ANSWER
Answered 2020-Feb-03 at 13:31I think the problem is not React itself, but the fact that you try to set the center and immediately the zoom. This way the second animation cancels the first one.
For the correct way of animating multiple properties you should use H.map.ViewModel#setLookAtData method:
QUESTION
I have XAMMP x86, on Windows 7, PHP 7.3.2.
Installed Imagick following instructions: https://github.com/Imagick/imagick
Everything works fine, except HEIC format reading.
I get an error:
ImagickException: NoDecodeDelegateForThisImageFormat HEIC' @ error/constitute.c/ReadImage/509
PHPINFO:
...ANSWER
Answered 2020-Jan-09 at 21:22The version of ImageMagick that you are using is too old. You will need to upgrade to at least the version below but I would advise you to upgrade to the latest version.
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