What is bit-plane encoding?
Bit-plane encoding is a technique for reducing the data. required to describe a series of sample values in binary. form.
What is bit-plane graphics?
A bit plane of a digital discrete signal (such as image or sound) is a set of bits corresponding to a given bit position in each of the binary numbers representing the signal.
What is bit-plane slicing used for?
Bit plane slicing is a method of representing an image with one or more bits of the byte used for each pixel. One can use only MSB to represent the pixel, which reduces the original gray level to a binary image. The three main goals of bit plane slicing is: Converting a gray level image to a binary image.
What is bit-plane decomposition?
To change grayscale image pixels in substitution step, it is decomposed into several binary images, called bitplanes. Figure 3 illustrates bit plane decomposition process. Assume we have a grayscale input image in which each pixel has a value between 0 and 255.
Which bit-plane contains the most information?
The highest bit-plane is the Most Significant Bit (MSB) and the lowest bit-plane is the Least Significant Bit (LSB). As such, each bit-plane descending from MSB to LSB makes a decaying, marginal contribution to the overall information contained in the image.
Why decomposing an image into its bit planes is useful?
Moreover, the traditional encryption algorithms still need security improvements. Selective image encryption can be realized in the spatial domain by decomposing the image into bit-planes before compression. Consequently, encryption is achieved by encrypting a subset of the most significant bit-planes .
How many planes are in grayscale image?
Digital images can be classified as grayscale (8-bit-planes) or colored (24 bit-planes) which depends on each pixel intensity levels, i.e., each pixel can be represented by 24-bits, 8-bits or even only one bit.
How bit plane slicing is useful for steganography?
This technique is called Bit Plane Complexity Segmentation (BPCS) Steganography. The main principle of BPCS technique is that, the binary image is divided into informative region and noise-like region. The secret data is hidden into noise-like region of the vessel image without any deterioration.
Which bit plane contains the most information?
What is gray level slicing?
Gray Level Slicing. Grey level slicing is equivalent to band pass filtering. It manipulates group of intensity levels in an image up to specific range by diminishing rest or by leaving them alone. This transformation is applicable in medical images and satellite images such as X-ray flaws, CT scan.
What do you call black, white and grey?
The term monochrome comes from Ancient Greek μόνος (mónos) ‘one’, and χρῶμα (khrôma) ‘color’. A monochromatic object or image reflects colors in shades of limited colors or hues. Images using only shades of grey (with or without black or white) are called grayscale or black-and-white.
What is intensity slicing?
Intensity level slicing means highlighting a specific range of intensities in an image. In other words, we segment certain gray level regions from the rest of the image. Suppose in an image, your region of interest always take value between say 80 to 150.