Image processing apparatus and control method
An image processing device and technology for image data, which are applied in image data processing, image data processing, image communication, etc., and can solve the problem that the actual size becomes very large.
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no. 1 example
[0037] A first embodiment of the present invention will be described as follows. According to the image processing apparatus of this embodiment, in an environment of printing black-and-white image data generated from original color image data, it is possible to generate a barcode including color difference data from brightness data and color difference data in the original color image data, and to print Black and white image data is output together with the generated barcode. In addition, the image processing apparatus according to the present embodiment can read a black-and-white printed matter printed with a barcode containing color difference data by using a document reading apparatus such as a scanner, and can Black and white image data to restore the original color image data.
[0038] By including only color difference data instead of barcodes including all color data, the data volume of barcodes can be substantially reduced.
[0039]First, a printing system including ...
no. 2 example
[0139] In the above-mentioned first embodiment, in step 705, the CPU replaces the color difference data obtained by scanning with the color difference data included in the digital watermark image data.
[0140] More specifically, the CPU changes the color difference data of each pixel in the unit area obtained by scanning to a representative value of the color difference data included in the digitally watermarked image data as the color difference data in the unit area.
[0141] For the following reasons, in the second embodiment, the CPU executes Figure 11 The processing in Step 705 in the first embodiment is executed instead of the processing in Step 705 of the first embodiment. The following will refer to Figure 10 Simply state why.
[0142] refer to Figure 10 , Figure 10 Region 5 in the image shown includes blue pixels, red pixels and green pixels.
[0143] Figure 10 An example of a 48 x 48 pixel image is illustrated. Here, the area 5 is a unit area of 16×16 ...
no. 3 example
[0171] According to the second embodiment, the fact obtained from experiments or experiences is utilized in the system for restoring color image data: in a read image (black and white image), the part where the brightness changes is usually the part where the color changes . However, as described in the second embodiment, using this method may also fail.
[0172] In this regard, the third embodiment replaces Figure 11 Executed while processing in Figure 13 in order to reduce the probability of failure and improve the accuracy of restoring color image data. More specifically, in Figure 13 example, provides Figure 11 The configuration does not include the edge extracting unit 1301 and the reference range defining unit 1302.
[0173] The edge extraction unit 1301 performs processing to extract edges, and extracts edge information from the received divided luminance data. Here, the divided luminance data received from the area dividing unit 1101 is used. However, the lu...
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