Color space conversion tools
Color Space Conversion Introduction
Typically, when you are developing drivers for any particular sensor you will come across the problem of capturing image data in a not compressed format such as Bayer(RAW8, RAW10, RAW12), YUV, NV12, etc. On this wiki page, you will find useful tips to convert from raw images to a compressed format.
RAW Data Viewer
In order to analyze raw image data, you probably will need to display memory dumps of frame buffers, image buffers, and uncompressed image files. RawPixels is a web browser based image viewer that will allow you to explore with several settings the frame you are analyzing.
Bayer 8-bit,10-bit and 12-bit (RAW8, RAW10, RAW12) compression
Python
The following commands can be used in order to convert the RAW image to grayscale PNG.
import numpy as np
from PIL import Image
a = np.fromfile("test.raw",np.uint8,$width*$height,"").reshape(($height,$width))
Image.fromarray(a).save("test.png")
GStreamer
- On GStreamer 1.8, you can use the following command to convert to JPEG
GST_DEBUG=WARNING gst-launch-1.0 -v filesrc location=test0.raw blocksize=42923008 ! "video/x-bayer,format=bggr,width=5344,height=4016,framerate=1/1" ! bayer2rgb ! videoconvert ! avenc_mjpeg ! filesink location=frame.jpeg -v
Bayer2rgb
Command line utility to convert Bayer data to RGB data. Integrates with ImageMagick.
https://github.com/jdthomas/bayer2rgb
git clone https://github.com/jdthomas/bayer2rgb.git cd bayer2rgb/ make ./bayer2rgb --input=pic.raw --output=pic.tiff --width=1280 --height=800 --bpp=16 --first=RGGB --method=BILINEAR --tiff convert pic.tiff pic.png eog pic.png
raw2rgbpnm
Raw2rgbpnm is a tool to convert Bayer data to RGB data. The source code is available on: https://github.com/martinezjavier/raw2rgbpnm
So, run the following commands to download the tool and compile it:
git clone git clone git@github.com:martinezjavier/raw2rgbpnm.git cd raw2rgbpnm
Open the file raw2rgbpnm.c and change the line 489 with:
int c = getopt(argc, argv, "a:b:f:ghs:wn");
This is to enable the option to extract multiple frames from a file. Now, you can build the application:
make
 | Note: This tool converts from GRBG10 to pnm. |
And convert buffers with:
./raw2rgbpnm -f SGRBG10 -s 1920x1080 -b 5.0 -n test_1920x1080.bayer output_1920x1080
imagej
To install imagej, it is recommended to use the Java bundle obtained from: ImageJ bundled with Java 1.8.0_172
Download "Debayer Image" plugin from https://github.com/ij-plugins/ijp-DeBayer2SX
wget https://github.com/ij-plugins/ijp-DeBayer2SX/releases/download/v.1.3.2/ijp-debayer2sx_v.1.3.2.zip unzip ijp-debayer2sx_v.1.3.2.zip #unzip inside ImageJ/plugins directory, directory inside ImageJ bundled download.
Open ImageJ
./ImageJ
A new option will appear inside the "Plugins" tab, use the Debayer2 option after opening the Bayer file: Plugins -> Raw Processing -> Debayer2
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