An image information transmission system that transmits image information, one frame of which is constituted by a plurality of image data. The plurality of pixel data corresponding to the one-frame image information is divided into a plurality of pixel blocks using a predetermined number of pixel data as a unit pixel block. Maximum and minimum values of pixel data within each pixel block are detected in units of divided pixel blocks. Maximum value data representing the detected maximum value and minimum value data representing a detected minimum value are output. One of the different quantization characteristics is selected in accordance with a difference between the maximum and minimum values of each pixel blocks output as described above. A level region between the maximum and minimum values is quantized to obtain a plurality of regions on the basis of the selected quantization characteristic. Position data representing one of the plurality of regions to which the pixel data within the pixel block belongs is output. The maximum and minimum value data output in units of pixel blocks and the position data output in correspondence with the pixel data within each pixel block are transmitted as described above, and therefore, a high-quality image information signal can be transmitted regardless of the characteristics of images.
Biometry for transforming, receiving, processing and analyzing electronic images of living biological objects is provided. The Biometry detects the objects, which produce insignificant periodical oscillations thereby making it possible to receive and analyze the images of the objects on a background of stationary and moving objects. Successive exposures of the object's image are received and picture-to-picture differences are evaluated, and a sum of differences of at least two successive exposures during the processing thereof is accumulated. The biometry comprises a photosensitive multielement transducer (1) and means for processing the images of the picture-to-picture difference which contain an exposure memory (2,3), a unit for evaluating the picture-to-picture difference (4), a picture-to-picture difference summator (5) and control registers (6). The device accumulates the sum of the exposure differences detected by the photosensitive multielement transducer.
