MegaPixel | GUI for avif , webp , jpegxl , mozjpg and ect | Image Editing library
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kandi X-RAY | MegaPixel Summary
GUI for avif, webp, jpegxl, mozjpg and ect
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QUESTION
When I read a PNG image in Java using javax.imageio.ImageIO.read()
, the resulting BufferedImage
is of TYPE_3BYTE_BGR
or TYPE_4BYTE_ABGR
depending on transparency.
I'm processing very large images (64+ megapixels), and need them in TYPE_INT_RGB
/ TYPE_INT_ARGB
format, which requires an expensive and very-large-chunk-of-memory hogging repainting of the image onto a new image in the correct format, which is causing OOMs.
It would be much better if I could somehow persuade ImageIO
to read the image in the desired format from the get-go - is there any way of doing that? Thanks!
ANSWER
Answered 2022-Feb-22 at 07:26Yes, it is possible to read into a predefined type of BufferedImage
, given that the type is supported by and compatible with the reader plugin. Most often the TYPE_#BYTE_*
types are compatible with the TYPE_INT_*
types, and this is the case for the standard PNGImageReader
.
To make it work, you need access to the ImageReader
directly, and use the read
method that takes an ImageReadParam
to control the type of image. It's possible to read into a pre-allocated image by using the ImageReadParam.setDestination(..)
method, or to just specify the type of image and let the reader plugin allocate it for you by using ImageReadParam.setDestinationType(..)
like I will show below.
Here's a short stand-alone code sample that shows how to read into a specific image type:
QUESTION
Product Image is not rendering in the custom Spartacus Component. Below is a code snippet of HTML Code.
I have checked the cx-media which takes the Image container and loads the image. But I was not able to figure out what is missing in my custom Spartacus storefront.
Also no request is triggered from spartacus to get the image. But the same happens on PDP. I am using the OOTB cx-media. Will this not call it internally?
...ANSWER
Answered 2022-Feb-10 at 10:24I think the response is simple 😁
TL;DR : Apply normalizer pipe as soon as you get the data:
QUESTION
Unfortunately I have a problem with my code. Over the months I have added a few things to my program every now and then. Now the code is a bit "misbuild(t)" and I need your help.
I have a program in which there are threads and posts – like in a classic Internet forum. A thread can contain multiple posts; a posting contains several images and texts. So... You can click on a certain posting in the ListBox and display its images as large as possible. This is done with a separate form. With 3 different radio buttons I can sort it according to the size of the images (megapixel), or according to the modification date, or according to the file name. To be able to sort by megapixel, I once created an class Bildeigenschaften
(image properties class). The sorted_List
is therefore a List(of Bildeigenschaften)
.
Today, I discovered that sorting by name is unlike sorting by name in Windows Explorer. Windows Explorer sorts Natural (as I found out), so this is how it is
ABC9
ABC10
instead of like in my program
ABC10
ABC9
. So I got some code that sorts "Natural". How do I get this linked now?
the Form
...ANSWER
Answered 2022-Jan-08 at 15:29You can use Windows' StrCmpLogicalW
that is also used by the explorer:
QUESTION
ANSWER
Answered 2021-Nov-24 at 16:25It seams PIL and crop has some problems with LZW compression. Removing the compression with Photoshop makes the script running like expected.
QUESTION
update when i write (as answerer said)
...ANSWER
Answered 2021-Nov-03 at 21:27I think you want something more like this to process multipage TIFFs. I have tried to improve your variable names from nondescript names like data
, var
to make it more readable.
QUESTION
I try to add image to the product detail JSP page. Here is the table structure of table:
...ANSWER
Answered 2021-Sep-07 at 12:12Looks to me that you have a typo in your url. It should read:
QUESTION
I'm writing a macOS app which performs a complicated chain of CIFilter
operations on an image to greatly change the appearance of high resolution photographs, often 24 megapixels or larger.
Some of these effects included are gaussian blurs, unsharp masks, bloom, gloom, as well as a custom "grain" fragment shader I wrote in Metal using a custom CIKernel
. The CIContext
is using a Metal device to render it. Essentially, it's a long chain of initialImage -> CIFilter -> outputImage -> CIFilter -> outputImage -> CIFilter -> ...
Not only must all of these CIFilters be run in sequence for a final output, they must also be run on the full resolution for effects to be correctly scaled.
The problem I face is that executing entire process results in a massive usage of memory. With a 6000x4000 input image, the memory usage jumps to 6.6GiB while rendering.
I used the Metal instrumentation in Xcode to diagnose the problem and it seems that CoreImage is recursively allocating memory for each filter, so that memory just piles up and up until it can finally let go of all of the resources at the end.
I would have hoped this was sequential, releasing each source buffer before the next operation. I'm not sure exactly how to help the situation. Is there some way to pass each output image to the next filter, forcefully cleaning up each input CIImage
rendering first?
ANSWER
Answered 2021-Jul-06 at 05:27This seems to work well with only a few hundred MB of memory usage when displaying a 24 megapixel CIImage
to an NSImageView
without any CIContext.
QUESTION
These operations works:
- HEIC to other formats, e.g. convert IMG_8293.HEIC c.jpg
These operations produce invalid output:
- convert any format to HEIC, e.g.: convert c.jpg c.heic
- rotate HEIC: convert IMG_8293.HEIC -rotate 90 IMG_8293.HEIC
- other HEIC operations, e.g. flip, flop, etc.
Invalid output means: the metadata are shown properly but MacOS preview complains: "The file “c.heic” could not be opened. It may be damaged or use a file format that Preview doesn’t recognise.
".
The metadata of the input file c.jpg
...ANSWER
Answered 2021-Jun-22 at 08:27Upgrade to latest 7.1.0 version solved the issue.
QUESTION
There are 2 ways (that I'm aware of) to capture images/videos from the camera in an ionic app:
- Native camera app
- 'Camera Preview' library
The first option I know will allow users to maximise the potential of the camera (quality, megapixels etc.), but I need the flexibility of adding an overlay (basically I need the flexibility of the second option).
QuestionIn the docs I can only see the ability to see a 'quality' argument as part of the 'takePicture' call, how would a maximum of 100 here compare to the quality of a pic I'd have got from the native app?
I know this is called 'camera preview' but ideally I need it to be the best image quality the camera's capable of capturing (same as the native app).
https://github.com/cordova-plugin-camera-preview/cordova-plugin-camera-preview
...ANSWER
Answered 2021-Feb-18 at 05:04Take snapshot of the camera preview. The resulting image will be the same size as specified in startCamera
options. The argument quality defaults to 85 and specifies the quality/compression value: 0=max
compression, 100=max
quality.
QUESTION
I have a JPEG that I think has no EXIF data and I want to see if it is possible to detect scrubbing.
When I run exiftool on it I get the output below.
Are these fields derived by exiftool, even if there are no EXIF data, or does the output necessarily indicate the presence of EXIF inside the JPEG?
Or do all JPEGs contain EXIF even if they were to be scrubbed?
Is there a way to disable output of the derived information below to enable scrubbing detection?
...ANSWER
Answered 2021-Feb-03 at 17:01The command you want to run is this
exiftool -G0 -a -s dummy.jpg
This command will show tags with duplicate names (-a
(-duplicates
) option) and the groups they belong to (-G
(-groupNames
) option). Also, the -s
(short) option will give you tag names, not tag descriptions (see exiftool FAQ #2).
The resulting output would look similar to this
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