Patent ID: 9715362
Date: 2017-07-25
CPC Classifications: G06F,G06K,G06T,H04N

Claim:
1. A print controlling apparatus connected to an image forming apparatus, comprising: a user interface to input a printing command of a document displaying a plurality of overlaid objects; an image processor to detect a transparency region where a transparency is set, in the overlaid objects, to generate a transparency image by calculating a pixel value of the transparency region, based on a pixel value of each object and the transparency, and to generate printing data including the transparency image; and a communication interface to send the printing data to the image forming apparatus, the image forming apparatus being configured to print the printing data, wherein when an XOR rendering command, an AND rendering command, and an XOR rendering command are sequentially input for the same region, the image processor detects the region as the transparency region, the image processor calculates the transparency of the detected transparency region by calculating a ratio of a background value to a whole size of a transparency pattern, and the image processor renders each object in the document according to a rendering command, detects an input region of the rendering commands of the preset combination, as the transparency region when rendering commands of a preset combination are input for the same region, and generates the transparency image by calculating a pixel value of the detected transparency region, and generates the printing data comprising the generated transparency image.