Landsat satellite MSS/TM/fe-data-band combination

Reprinted from lianyi_dyq

321:True color synthesis, that is, the 3, 2, and 1 bands are respectively red, green, and blue, then the natural color synthesis image is obtained. The color of the image is consistent with the actual color of the original region or scene, applicable to non-Remote Sensing Application professionals.
432:Standard pseudo-color synthesis, that is, the 4, 3, and 2 bands are respectively red, green, and blue, respectively. The obtained image vegetation turns red, which highlights the characteristics of vegetation and is widely used, it is called standard fake color.
Example: satellite remote sensing images show blue-green algae outbreaks
First, let's take a look at the remote sensing monitoring mechanism during the outbreak of blue-green algae. When a blue-green algae outbreak occurs, the green algae are mixed with white foam pollutants on the surface of the water body. The spectral characteristics of the blue-green algae coverage area are significantly different from those of the surrounding Lake. Due to its high chlorophyll a, the blue-green zone has a high reflectivity in the landsattm2 band. The reflectivity in the tm3 band is slightly lower but still higher than that in the lake, and the highest reflectivity in the TM4 band. Therefore, on the TM4 (red), 3 (green), 2 (blue) pseudo-color synthetic images, the blue-green zone is red, which is significantly different from the surrounding dark blue and blue-black lakes. In addition, the outbreak of blue-green algae is subject to the effect of lake flow and wind direction, and is stretched along a band. The TM image shows a band structure and a float texture, which is significantly different from the surrounding lake surface.
451:The most abundant combination of information, TM image light wave information has 3 ~ 4-dimensional structure, which has the physical meaning of brightness, greenness, heat and humidity. Of the tm7 band spectral images, the 5th band generally contains the most abundant land information. There is a high correlation between the three visible bands (namely, 1st, 2, and 3) and between the two mid-infrared bands (I .e. 4th and 7, it indicates that the information in these bands is highly repetitive or redundant. The band 4th and Band 6 are special, especially the correlation between the band 4th and other bands is very low, indicating that the band information is highly independent. The results of calculating the entropy values of various combinations show that color synthetic images composed of a visible band, a mid-infrared band, and a 4th band generally have the most abundant ground information, generally, the combination of the 4, 5, 3, 4, 5, and 1 bands is the best. The 7th band only plays a special role in detecting forest fires, rock-ore alteration belts, and soil clay mineral types. After selecting the best band combination, you must consider the problem of color assignment to get the best color synthetic image. The most sensitive color to human eyes is green, followed by red and blue. Therefore, green should be given to the band with the largest variance. In accordance with this principle, the four, five, and three bands are respectively red, green, and blue. The color contrast is obvious and the layers are rich, in addition, the color display rules of various types of features are similar to those of conventional synthetic films, which meets the visual interpretation habits of conventional films in the past. For example, if you change the color of the 4 and 5 bands, that is, the 5, 4, and 3 are respectively given red, green, and blue, then an approximate natural color synthetic image is obtained, applicable to non-Remote Sensing Application professionals.

741:Band combination images are compatible with mid-infrared, near-infrared, and visible-light band information. They are rich in color and have a good sense of hierarchy. They have extremely rich geological information and surface environmental information, and have a high definition, there is little interference information, a high degree of geological interpretation, various structural traces (folds and fractures) are clearly displayed, and the boundary of different types of rocks is clear, the boundary of the rock formation unit, the distribution of special lithology, And the volcanic structure are also clearly displayed.

742:In 1615, the comprehensive interpretation of remote sensing geology was completed in the mining area of the gold and silver mine in the southeast of Guangxi province. The interpretation was carried out using a 481-tm7, 4, and 2 pseudo-color compositing tablets. A total of linear structures and ring images were obtained, the remote sensing image features and features of typical ore deposits of structural alteration rocks, Z vein and volcanic rocks are summarized.
On the basis of the mining model, the prediction of the ore-forming process in the whole region is to delineate 2 gold and silver a ore-forming distant scenic spots, 4 B categories, and 5 C categories. It provides a remote sensing basis for the optimal prospecting target area in this area.

743: Our country has successfully monitored forest fire and post-disaster changes in daxing'anling using us land Satellite Thematic Graphic System images. This is because the tm7 band (2.08-2.35 microns) is sensitive to temperature changes. The TM4 and tm3 bands belong to the infrared and red regions, respectively, and can reflect the optimal band of vegetation, in addition, it can reduce the impact of smoke. At the same time, tm7, TM4, tm3 (respectively given red, green, blue) color synthesis map colors are close to natural color, therefore, we can analyze the color Synthetic Map tm743 to control forest fire spreading and disaster recovery.
754:For lake water level changes in different periods, different bands can also be used, such as the blue and dark blue colors in standard fake color images synthesized by Landsat mss7, mss5, and mss4. This can be used to analyze the geological rules of lake water level changes.

541:Remote Sensing Investigation of sand and gravel ore in XX development zone is conducted through the selection of the best band fefee7 combination (TM5, TM4, TM1) of the Land satellite TM and interpretation and analysis of various remote sensing data of aviation and aerospace, in the preliminary interpretation, we found out the Quaternary landform of the investigation area. For example, if you change the color of the 4 and 5 bands, that is, the 5, 4, and 3 are respectively given red, green, and blue, then an approximate natural color synthetic image is obtained, applicable to non-Remote Sensing Application professionals.

543:Band Selection and principal component analysis our research uses the TM data of August 2, 1995. For screen display and screen image analysis, use the most informative combination of 5, 4, and 3 bands to generate a false color synthetic image in three colors: Red, green, and blue, this combination of synthetic images is not only similar to natural colors, but also a symbol of People's visual habits. Due to the rich information, it can fully display the differences between the image features of various features, making it easy to select training sites, to ensure the accuracy of the training site; for Computer Automatic Identification Classification, using Principal Component Analysis (K-L transformation) data compression, the formation of three components of the image data for Automatic Identification Classification. This work is a comprehensive method that combines the interpretation of remote sensing images with geological and geophysical data. The interpretation is a visual interpretation. The interpretation of remote sensing images is as follows: the images were processed and amplified as March 1984 satellite TM pseudo-color films (5
, 4, 3 band synthesis) and shot in July 1979. 60 thousand black and white aerial films are the main types of work films, and TM fake colored films (7, 4, and 2 band synthesis in) are used as the reference films.

453:In this study, the remote sensing information source was received by the satellite remote sensing ground receiving station of the Chinese Emy of Sciences in October 1995 by the us mss Satellite Remote Sensing TM band 4 (red), band 5 (green), band 3 (blue) CCT tape data creation and
A-bit pseudo-color synthetic satellite image. The features of the mountain, Hill, plain, and other Karst landscapes and images of various types of land use are clearly differentiated. During the imaging period, the late rice is close to harvest, and there is no water in the rice field, so the color of the paddy field in the farmland type is pink. In the dry land, most of the crops are harvested, and the soil moisture is less and gray-white; because the vegetables grow well, the colors are bright and red. The color of the garden area is light brown, and the plot rules are neat and clear. The color of the trees in the forest area is dark brown, while the shrubs distributed in the mountainous and hill areas of the karst area are yellow to yellow. Most pastures are yellow-green. The towns in the construction land are blue, the roads are linear, And the colors are gray. The railway lines are light blue, the runway is blue, and the background grass is blue-green; the construction site of the new airport is white rectangular; the old airport is white, with clear and relatively clear shape
Rules. Both reservoirs and rivers are dark blue. The red, green, and blue colors are synthesized in the 4, 5, and 3 bands. The color contrast is obvious and the layers are rich. In addition, the color display rules of various kinds of features are similar to those of conventional synthetic films, meets the visual interpretation habits of conventional films in the past.472:In terms of TM4, 7, 2 band pseudo-color synthesis and computer interpolation amplification technology
The TM image map features a engineering geological map, quantitative monitoring of the Bank's development rate, and measuring the rock (broken) layer occurrence on a single aerial photograph.
Iii. Type extraction:
1. city and township extraction: TM1 + tm7 + tm3 + TM5 + TM6 + TM2-TM4
2. Villages and Towns: TM1 + TM2 + tm3 + TM6 + TM7-TM4-TM5
3. River extraction: TM5 + TM6 + TM7-TM1-TM2-TM4
4. Road Extraction: TM6-(TM1 + TM2 + tm3 + TM4 + TM5 + tm7)

Iv. spectral differences
It is difficult to separate TM1 residential land from river vegetable land.
TM2 residential land and river vegetable land are not easy to score
Rural and vegetable fields in tm3 are not easy to score
TM4 farmland and roads are not easy to classify, towns, roads, and beaches are easily muddy.
TM5 county towns and farmland are not easy to score
TM6 villages and rivers are easy to mix
First, we need to know the differences between a pseudo-color image and other images. Generally, the single-band or full-color image in RS is a black and white image. The quality of the black and white images is generally measured in "gray scale. The three-band combination shows a color image including:
True color (true color): (three-band combination), which respectively gives three RGB colors to the three RGB bands, one-to-one correspondence, the color of the synthesized image is consistent with the actual color of the original region or scene. It is called true color and true color is the only synthetic color.
Pseudo color: converts black and white images to color images, and assigns different colors or a color series to different gray scales or gray ranges based on values, the color of the obtained image is different from that of the actual color, that is, the pseudo-color image.
False Color: (three-band combination). The RGB three colors are assigned to the images of different bands, which is not one-to-one correspondence with the RGB three bands of the original band, the color of the image is different from that of the actual color. This is called a fake color image. A fake color image aims to make the features of some features more obvious and help us to interpret and analyze the image.