Abstract
Recently, there have been several automatic approaches to color grayscale images, which depend on the internal features of the grayscale images. There are several scales which are considered as a prominent key to extract the corresponding chromatic value of the gray level. In this aspect, colorizing methods that rely on automatic algorithms are still under investigation, especially after the development of neural networks used to recognize the features of images. This paper develops a new model to obtain a color image from an original grayscale image through the use of the Support Vector Machine to recognize the features of grayscale images which are extracted from two stages: the first stage is Haar Discrete Wavelets Transform used to configure the vector that combines with six of Statistical Measurements: (Mean, Variance, Skewness, Kurtosis, Energy and Standard Deviation) extracts from the grayscales image in the second stage. After the Support Vector Machine recognition has been done, the colorization process uses the result of Support Vector Machine to recover the color to greyscale images by using YCbCr color system then it converts the color to default color system (RGB) to be more clear. The proposed model will be able to move away from relying on the user to identify the source image which matches in color levels and it exceeds the network determinants of image types with similar color levels. In addition, Support Vector Machine is considered to be more reliable than neural networks in classification algorithms. The model performance is evaluated by using the Root Mean Squared Error (RMSE) in measuring the success of the assumed modal of matching the coloring (resulting) images and the original color images. So, a reality-related result has been obtained at a good rate for all the tested images. This model has proved to be successful in the process of recognizing the chromatic values of greyscale images then retrieving it. It takes less time complexity in trained data, and it isn’t complex in working.
Highlights
The colorization process can be done automatically by using a computer to recover the color of black-and-white and grayscale images or films
These images are subject to the unification of each size in order to obtain a vector of equal length for all images when extracted the vector using the first stage (Haar-Discrete Wavelet Transform (DWT)) in extract features process
This paper developed an automatic technique to colorize grayscale images by using Support Vector Machine (SVM) as a recognition technique for the most similar color images to convert its colors to target grayscale images
Summary
The colorization process can be done automatically by using a computer to recover the color of black-and-white and grayscale images or films. There is a wide use of this technique in image processing and it can be used scientifically to recover the color of black-and-white films or to restore old color films. LL M RBF si u x YCbCr. Diagonal-Frequency Components (Sub Image) In Haar-DWT. Horizontal-Frequency Components (Sub Image) In Haar-DWT Kernel Function. Vertical-Frequency Components (Sub Image) In Haar-DWT Low-Frequency Components (Sub Image) In Haar-DWT Number of Image Gaussian Radial Basis Function Support Vectors Train Vector Test Vector Color Space Consists Of A Three Channels Y, Cb, and Cr. So Y Channel and this depends on different methods and each process requires time and technical accuracy to restore the colors suitable for grayscale images
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