Compression techniques for the JPEG image standard by using image compression algorithm

الملخص EN

Because of the raising needs for transmitting images in computer, mobile milieus, the study in the area of compressing image maximized considerably.

Compressing image plays a critical part in processing digital images.

The essential concept of compressing data is to decrease the data correlation.

Through employing Discrete Cosine Transform (DCT), the data in time field could be transmuted into the field of frequency.

Due to the reduced sensitivity of human sight in higher frequency, I is possible to compress data of the image or video by overturning its high frequency constituents nonetheless do no alteration to the eye.

When pictures move like in video, the data in three-dimnsional space includes spatial plane and time axis.

Hence, beside decreasing spatial correlation, time correlation is needed to be decreased.

A process is presented named Motion Estimation (ME).

Moreover, we can substitute the image by a Motion Vector (MV) to decrease time correlation.

Thus, the improvement of effective methods for image compression becomes essential.

Through the study, we similarly present JPEG standard and MPEG standard that are reputed image and video compression standard, correspondingly.