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frog amphibian nature wildlife animal eye macro photography branch leaf green orange white background close-up portrait detail texture pattern color form shape line space composition depth-of-field focus blur light shadow contrast brightness saturation hue temperature tint vibrance clarity sharpness noise grain texture resolution megapixels pixels per-pixel ppi dpi scan scanning digital digitization digitized computer technology science research development innovation discovery invention creation art design illustration graphic visual image picture photo photograph photography photographer camera lens aperture shutter speed iso exposure metering focus depth-of-field composition rule of thirds leading lines symmetry balance contrast color hue saturation light shadow brightness temperature tint vibrance clarity sharpness noise grain texture resolution megapixels pixels per-pixel ppi dpi scan scanning digital digitization digitized computer technology science research development innovation discovery invention creation