对于图像处理的研究（Research about image processing)

电子科技大学 格拉斯哥学院 2017级李奕凡

Image Processing is a technology that
analysing,editing and processing images,which could satisfy the visual and
mental needs.Image processing is included in the application field of signal
processing.Nowadays most images are saved as digital form,thus we also call it
digital image processing.Besides,the processing method based on optical theory
is still significant.

Image processing is one of the branches of
signal processing,which related to computer science,artificial intelligent,etc.

Many traditional techniques and concept of
one-dimension signal processing could be used in image processing till
today,such as de-noising and quantization.However,image belongs to
two-dimension signal,compared with one-dimension signal,it has some difference.

Several decades ago,most image processing
are operated by optical devices in simulation mode.Because of the parallel
quality of these optical means,they are still in core position in most
application fields,for example,the holograpy.But with the rapid increase of
computers’ speed,these techniques are gradually replaced by digital image
processing.

In general,digital image processing is more
adaptable,reliable and accurate.In comparison with simulation means,they are
easier to achieve.Specific hardware is used for digital image processing and it
own huge commercial success.At present,hardware solution is widely used in
video processing system,but commercial image processing is always done by
software on PC.

Most concepts served for one-dimension
signal have their own extension in two-dimension image processing field.But in
some situations they are pretty complicated.Meanwhile the image processing
itself has some new concepts,such as connectivity and rotational invariance,etc.These
concepts have extraordinary meaning when it comes to two-dimension or
higher-dimension situations.

Fourier transform if often used in image
processing,for it can drop the workload and processing time.

As for the application,image processing is
widely used in many fields.For example,photography and publishing,satellite
image processing,medical image processing,face detection,feature
detection,microscope image processing and car barrier detection.