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Questions tagged [bit-depth]

70 questions
27
votes
4 answers

Color banding and artifacts with gradients despite using RGBA_8888 everywhere

I'm aware that colour banding is an old chestnut of a problem that has been discussed many times before with various solutions provided (which essentially boil down to use 32-bit throughout, or use dithering). In fact not so long ago I asked and…
Trevor
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1 answer

What is a channel in a .wav file format?Do all channels play simultaneaously when a wav file is played?

I read about.wav file format by googling,all I could figure was that Frames are made of samples(of some defined bit depth) and a wav stereo file has a multiple of something called channels.... The confusion is whether a channel is made up of…
Soul Enrapturer
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9
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1 answer

LG G watch not displaying 32-bit Images or Gradients with full color depth

I've been struggling to get gradients to appear smooth on my LG G Watch running Android 5.0.1. Before you mark as a duplicate, I have tried every answer for several posts (like Why android lose image quality when displaying a png file?, Is it…
Jason
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9
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2 answers

How can I check the color depth of a Bitmap?

I'm working on an application that prints a folder of image files, including JPEG and TIFF. The TIFF images are usually Black and White (1bpp). After loading the image, I want to determine if the image is Color or B&W or Grayscale so I can send the…
Chris Thompson
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7
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1 answer

how to use sox to compress mp3?

I'd like to reduce the file size of some mp3 audios with sox. I think I can reduce stereo to only 1 channel (i.e. mono), reduce the sample rate and reduce the bit-depth. I find it seems sox can do none of that. Is this true or did I have done it…
RNA
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7
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3 answers

How to convert int32 numpy array into int16 numpy array?

I want to conert a numpy array from int32 type to int16 type. I have an int32 array called array_int32 and I am converting that to int16. import numpy as np array_int32 = np.array([31784960, 69074944, 165871616])` array_int16 =…
user8026974
6
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3 answers

Determining Bit-Depth of a wav file

I am looking for a fast, preferably standard library mechanism to determine the bit-depth of wav file e.g. '16-bit' or '24-bit'. I am using a subprocess call to Sox to get a plethora of audio metadata but a subprocess call is very slow and the only…
user3535074
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6
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1 answer

Changing the bit-depth of figures produced using Matplotlib

I'm using matplotlib to generate some figures via savefig. These figures are black and white and need to be saved at a very high resolution (1000 dpi) in TIFF format. It would therefore be beneficial to save them with a reduced bit depth so as to…
sircolinton
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6
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2 answers

Reduce bit-depth of PNG files from the command line

What command or series of commands could I execute from the CLI to recursively traverse a directory tree and reduce the bit-depth of all PNG files within that tree from 24bpp to 16bpp? Commands should preserve the alpha layer and should not increase…
teabot
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5
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1 answer

Using ffmpeg or ffprobe to get the pixel bit depth of a video

Is it possible to use ffprobe or ffmpeg to figure out the bit depth of a video file? I specifically want to know how many bits per channel (bpc) my video is. 8 is typical, but some fancier codecs can use higher bit depths, and I'm not sure how to…
joejoejoejoe4
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5
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1 answer

Does CGImage support 16 bits per channel?

bitsPerComponent says it's at most 8, but a couple of Stack Overflow questions imply 16 is supported.
Kartick Vaddadi
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4
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2 answers

How to PHP get bit depth of a given PNG image file?

In PHP code, given an .png image path, I need to detect the bit-depth of that image. How can I do that? I've tried to use getImageSize() and read the bits as below sample code but it always returns '8' for 24-bits/32-bits image. Please help. class…
Nam G VU
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4
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How to export 16-bit HEIF images in Swift?

I am trying to write an export function for my app that allows 16-bit depth HEIF files. Apple's documentation doesn't specify whether 16-bit is supported nor if the writeHEIFRepresentation() method requires any specific option for that. I have been…
AndreG
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Get color depth of a Bitmap

I want to get the bit depth (and color space) of an image file with c#. Here are my testfiles. Using the properties of the windows explorer, I verified their bit depths (8, 16, 24, 48, 96). BitmapImage.Format.BitsPerPixel var source = new…
Leander
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How can I get the bit depth/sample rate of audio JS?

I need to get the Sample Rate of Audio file, loaded by standard input element. I tried to use this function function func(e) { let reader = new FileReader(); reader.readAsArrayBuffer(e.files[0]); reader.onload = function(event) { …
Vera
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