Infrared Photography #003

It signals that during these hours of the day, terrestrial objects are not affected by the heat rays of the Sun, which means they emit their own heat. That is why the vast majority of thermal surveys, accompanied by aerial photography, are performed in the early morning or in the last bright hours of the day. Geophysicists surveyed 1,500 km2 of the land area that once held the Golden Fleece. A heat map of the ancient lowland, glued together from thin strips of photographs, revealed several anomalous zones. However, even an approximate, by eye, differentiation of these areas in a black-and-white image turned out to be a difficult task. Our eye distinguishes light levels much worse than the worst spectroscope. The situation is especially bad with degrees of blackness. In any case, the human eye is much better at distinguishing shades of color. The ability of the human eye to react more acutely to shades of color (than to the contrasts of a black-and-white image) was used to decode infrared images. Rather, knowing this feature of our vision, a black-and-white heat map is often translated into color. Twice a day, at approximately 9 and 21 o'clock local time, the OAA satellite crosses the territory of the United States of America and picks up infrared signals from terrestrial objects. The radiometer registers waves in the range of 0.7—12 microns and distinguishes individual objects about 1 km in size from a height of almost 300 km. Data from the satellite is transmitted to a computer, which independently builds a color map of thermal infrared imaging in a convenient (though unusual for us) scale of 1:22,000. Of course, the colors on this map are conditional: the black field corresponds to a temperature of -16 C, blue from -16 to -11 C, greenish-yellow — from 0 to 29 C. Intermediate temperatures are indicated by the corresponding transitional shades of colors. The entire range of phototones, from black to white, is divided into 256 shades — temperature levels. Each phototone level is assigned its own specific color, which is entered into memory. In the process of digital processing, the image undergoes certain mathematical transformations — it is differentiated (to emphasize thermal contrasts), smoothed (to eliminate shooting defects), etc. The object selected for final decoding is displayed, photographed on ordinary color film and the result of processing is placed on the interpreter's table in the form of a color photograph. gerçekten hoşuma gitti başarıbet Çünkü burada gerçek parayla oynayabilirsiniz.