Jpeg compression quantification method suitable for aerial images
A quantization method and aerial image technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of reducing the amount of data, picture distortion, unfavorable storage, etc., to achieve the effect of reducing the amount of data and facilitating storage
A quantization method and aerial image technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of reducing the amount of data, picture distortion, unfavorable storage, etc., to achieve the effect of reducing the amount of data and facilitating storage
CN110430429AInactive Publication Date: 2019-11-08土豆数据科技集团有限公司
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] see figure 1 , the present invention provides a technical solution: a jpeg compression and quantization method suitable for aerial images, comprising the following steps: Step 1, image preprocessing; Step 2, DCT transformation; Step 3, quantization processing; Step 4, Huffman coding;
[0022] Among them, in the above step 1, the aerial image is preprocessed:
[0023] 1) Color space conversion: Convert the aerial image from the RGB channel to the YCbCr...
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The invention discloses a jpeg compression quantification method suitable for aerial images. The jpeg compression quantification method comprises the following steps: step 1, carrying out image preprocessing; step 2, carrying out DCT transformation; step 3, carrying out quantification processing; step 4, carrying out Huffman coding; wherein in the step 1, aerial images are subjected to sexual preprocessing; wherein in the step 2, DCT transformation is carried out on a Y channel, a Cb channel and a Cr channel of a preprocessing result image in the step 1. A jpeg compression quantification method is used for aerial image compression processing. On the premise of ensuring that the pictures before and after compression have almost no difference, the jpeg compression quantization processing process is adopted. The data size of the aerial photo is greatly reduced, later storage is facilitated, a new quantization table is applied in the jpeg compression quantization processing process, and the problems that the compressed image block effect is particularly prominent, the image distortion is serious and the method is not suitable for aerial photo application of the unmanned aerial vehicleafter processing is completed by using the standard recommended quantization table are solved.
Description
technical field [0001] The invention relates to the technical field of image processing methods, in particular to a jpeg compression and quantization method suitable for aerial images. Background technique [0002] Aerial photography, also known as aerial photography, aerial photography or aerial photography, refers to taking pictures of the earth's landforms from the air and obtaining a top view. Platforms include airplanes, helicopters, hot air balloons, small spaceships, rockets, kites, parachutes, etc.; in order to stabilize aerial photos, sometimes advanced photography equipment such as Spacecam is used. There are more and more cameras, and the resolution of images is getting higher and higher, which makes the existing aerial photography data huge, which is not conducive to later storage; among them, JPEG has an extremely wide application in the field of static image compression, which can ensure that the images are In the case of less detail loss, a higher image compr...
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Patent Timeline
08 Nov 2019
Publication
CN110430429A
- IPC
- H04N19/122; H04N19/124; H04N19/176; H04N19/146
- CPC
- H04N19/122; H04N19/124; H04N19/146; H04N19/176
- Inventors
- 李延峰; 张晓飞