Image Processing, Part 7: Spatial Frequency FilteringDr. Dobb's Journal
In mathematics, physics, and engineering, spatial frequency is a characteristic of any structure that is periodic across position in space. The spatial frequency is a measure of how often the structure repeats per unit of distance. The SI unit of spatial frequency is cycles per meter. In image...
Pitas, "Watermarking in the Space/Spatial-Frequency Domain Using Two-Dimensional Radon-Wigner Distribution," IEEE Trans. Image Processing, vol. 10, no. 4... S Stankovic,I Djurovic,I Pitas - 《IEEE Transactions on Image Processing A Publication of the IEEE Signal Processing Society》 被引量: ...
image pattern, wherein the chromatic image pattern includes a first chromatic image pattern, which appears as a result of making a copy, wherein the achromatic image pattern includes a first achromatic image pattern, which appears as a result of making a copy, wherein a spatial frequency of ...
Different from the conventional scheme, the interpolation of a digital image is achieved with a sub-unit... QS Chen,MS Weinhous - Medical Imaging: Image Processing 被引量: 7发表: 1999年 An error concealment technique in the spatial frequency domain Multimedia services requiring image and video ...
今天又复习了一遍<<Digital Image Processing>>的第四章,为了加深对频域的理解,我自己用PS画了一张图。如下: 然后做FFT,得到频谱图如下: 从左到右依次表示:图像的频谱、频谱图往横轴的投影、频谱图往纵轴的投影。原图与频谱图的关系可以从两个角度来理解: ...
i The input image of regular pentagon (left) with lp = 210 mm and output experimental results (right) of normalized electric field intensity distribution at the output focal length f2 = 100 mm and 10 GHz working frequency for 2D-edge detection. j The input image of regular...
The change in wave frequency for an observer that is moving relative to the wave source. For example, when an ambulance with a siren approaches an observer, a high-pitched sound (high frequency) is heard, but the perceived frequency drops when the ambulance passes and drives away. Bats know...
To reduce the influence of surface reflection from soybean seeds on the captured images, a polarizing film is installed in front of the projector. Fig. 2 Physical image of spatial frequency domain imaging system Full size image The imaging unit primarily consists of a lifting platform, computers,...
The samples were then washed three times (10 min per wash) in TBS and dried. Images were acquired using an Hyperion Imaging System, with the ablation frequency set to 200 Hz and the ablation energy set to 6 dB, with X and Y steps set to 1 µm. Breast cancer IMC data re...